Using and Configuring Features Version 3.4

Configuring and Monitoring Bandwidth Reservation

This chapter describes the Bandwidth Reservation System (BRS) configuration and operational commands.

This chapter includes the following sections:

"Bandwidth Reservation Configuration Overview"
"Bandwidth Reservation Configuration Commands"
"Accessing the Bandwidth Reservation Monitoring Prompt"
"Bandwidth Reservation Monitoring Commands"
Bandwidth Reservation Dynamic Reconfiguration Support

Bandwidth Reservation Configuration Overview

To access bandwidth reservation configuration commands and configure bandwidth reservation on your router:

At the OPCON (*) prompt, enter talk 6.
At the Config> prompt, enter feature brs.
At the BRS Config> prompt, enter interface #. The interface must be a point-to-point or Frame Relay interface. BRS cannot be configured on Frame Relay subinterfaces. See "Using Frame Relay Interfaces" in Access Integration Services Software User's Guide for more information.
At the BRS [i 0] Config> prompt, enter enable.
This is the interface prompt level, and the interface number is zero in this instance. You need to repeat step 3 and step 4 for each interface you are configuring.
If you are configuring BRS on a Frame Relay interface, continue with step 4a:
If you are configuring BRS on any other interface, go directly to step 5.
1. At the BRS [i 0] Config> prompt, enter circuit #, where # is the number of the circuit you want to configure.
2. At the BRS [i 0] [dlci 16] Config> prompt, enter enable. This is the circuit prompt level and the circuit (DLCI) number is 16 in this instance.
3. At the BRS [i 0] [dlci 16] Config> prompt, enter exit to return to the interface level prompt.
4. Repeat steps 4a through 4c for each circuit for which you want to define BRS t-classes.
Restart your router.
Repeat steps 1 through 3 to configure bandwidth reservation for the particular interface that you have enabled.
If you are configuring BRS on a PPP interface, at the BRS[i 0]Config> prompt, configure traffic classes and assign protocols, filters, and tags to the traffic classes using the configuration commands listed in Table 3. If you are configuring BRS on a FR interface, follow steps 8 through 10.
If you are configuring BRS on a FR interface, you can configure circuit classes and assign circuits to circuit classes using the commands listed in Table 2
If you want to use default circuit definitions then enter the set-circuit-defaults command at the BRS[i 0]Config> prompt. This gets you to the BRS[i 0][circuit defaults] prompt where you can use the appropriate commands from Table 3 to configure traffic classes and assign protocols, filters, and tags to the traffic classes. Once you are through defining default circuit definitions for traffic class handling, enter "exit" to return to the BRS[i 0] Config> prompt.
If you have FR circuits that cannot use default circuit definitions for traffic class handling, enter circuit permanent-virtual-circuit circuit_number. This will access the circuit prompt where you can use the commands listed in Table 3 to create circuit-specific definitions for traffic class handling.

Note:

You do not need to restart the router for t-class and c-class configuration changes to take effect.

The talk 6 (t 6) command lets you access the configuration process.

The feature brs command lets you access the BRS configuration process. You can enter this command by using either the feature name (brs) or number (1).

The interface # command selects the particular interface that you want to configure for bandwidth reservation. Before configuring any BRS classes, you must use the enable command to enable BRS on the interface. In Step 4, the prompt indicates that the selected interface's number is zero.

The circuit # command selects the circuit on the FR interface on which you want to configure BRS traffic classes. Before configuring any BRS t-classes for the circuit, you must use the enable command to enable BRS on the circuit. In step 4b, the prompt indicates that circuit 16 on interface 0 has been selected.

You must enable bandwidth reservation for the selected interface and circuit and then restart your router before configuring circuit classes (Frame Relay only), and traffic classes.

To return to the Config> prompt at any time, enter the exit command at the different levels of BRS prompts until you are at the Config> prompt.

Bandwidth Reservation Configuration Commands

This section describes the Bandwidth Reservation configuration commands. The commands that can be used differ depending on the BRS configuration prompt that is displayed (BRS Config>, BRS [i x] Config>, or BRS [i x] [dlci y] Config>, or BRS [i x] [circuit defaults] Config>).

Table 1. Bandwidth Reservation Configuration Command Summary (Available from BRS Config> prompt)

Command Function
? (Help) Displays all the commands available for this command level or lists the options for specific commands (if available). See "Getting Help".
Activate-IP-precedence-filtering Activates BRS IPv4 precedence filtering of APPN and SNA packets that are sent over a secure IP tunnel or that are in secondary TCP or UDP fragments. You also must configure the setting of the IPv4 precedence bits when you configure DLSw, HPR over IP or TN3270.
Deactivate-IP-precedence-filtering Deactivates IPv4 precedence filtering processing.
Enable-hpr-over-ip-port-numbers Enables the use of BRS filtering for APPN-HPR over IP traffic and allows the configuration of the UDP port numbers used to identify HPR over IP packets.
Note: If APPN is in the load image, this command is not supported since BRS learns from APPN if HPR over IP has been configured and, if it has been configured, learns the UDP port numbers that will be used for HPR over IP packets from the APPN support.

Disable-hpr-over-ip-port-numbers Disables BRS filtering of APPN-HPR over IP traffic.
Note: If APPN is in the load image, this command is not supported since BRS learns from APPN whether or not HPR over IP has been configured.

Interface Selects an interface on which to configure bandwidth reservation.
Note: This command must be entered before using any other configuration commands.
See Table 2 and Table 3.
List Lists the interfaces that can support bandwidth reservation and, for each interface, indicates if bandwidth reservation is enabled or disabled.
Exit Returns you to the previous command level. See "Exiting a Lower Level Environment".

Table 2. BRS Interface Configuration Commands Available from BRS [i #] Config> prompt for Frame Relay Interfaces

Command Function
? (Help) Displays all the commands available for this command level or lists the options for specific commands (if available). See "Getting Help".
Add-circuit-class Sets the name of a bandwidth c-class and its percentage of bandwidth.
Assign-circuit Assigns a specified circuit to the specified bandwidth c-class.
Change-circuit-class Changes the amount of bandwidth configured for a bandwidth c-class.
Circuit Accesses the BRS circuit-level prompt (BRS [i x][dlci y] Config>) prompt where you can use the commands listed in Table 3 to configure Bandwidth Reservation on the Frame Relay circuit.
Clear-block Clears the configuration data associated with the current interface from SRAM. Circuit class configuration data and default circuit definitions for traffic class handling are cleared.
Deassign-circuit Restores the specified circuit to the default c-class
Default-circuit-class Assigns the name of a default bandwidth c-class and its percentage of the interface's bandwidth.
Del-circuit-class Deletes the specified bandwidth c-class.
Disable Disables bandwidth reservation on the interface .
Enable Enables bandwidth reservation on the interface.
List Displays the c-classes and assigned circuit definitions from SRAM.
Queue-length Sets the maximum and minimum values for the number of packets in a priority queue.
Set-circuit-defaults Accesses the BRS [i x] [circuit defaults] Config> command prompt so that you can use the appropriate commands from Table 3 to create default circuit definitions for traffic class handling.
Show Displays the currently defined c-classes and assigned circuits from SRAM.
Exit Returns you to the previous command level. See "Exiting a Lower Level Environment".

Command	Function
? (Help)	Displays all the commands available for this command level or lists the options for specific commands (if available). See "Getting Help".
Add-circuit-class	Sets the name of a bandwidth c-class and its percentage of bandwidth.
Assign-circuit	Assigns a specified circuit to the specified bandwidth c-class.
Change-circuit-class	Changes the amount of bandwidth configured for a bandwidth c-class.
Circuit	Accesses the BRS circuit-level prompt (`BRS [i x][dlci y] Config>`) prompt where you can use the commands listed in Table 3 to configure Bandwidth Reservation on the Frame Relay circuit.
Clear-block	Clears the configuration data associated with the current interface from SRAM. Circuit class configuration data and default circuit definitions for traffic class handling are cleared.
Deassign-circuit	Restores the specified circuit to the default c-class
Default-circuit-class	Assigns the name of a default bandwidth c-class and its percentage of the interface's bandwidth.
Del-circuit-class	Deletes the specified bandwidth c-class.
Disable	Disables bandwidth reservation on the interface .
Enable	Enables bandwidth reservation on the interface.
List	Displays the c-classes and assigned circuit definitions from SRAM.
Queue-length	Sets the maximum and minimum values for the number of packets in a priority queue.
Set-circuit-defaults	Accesses the `BRS [i x] [circuit defaults] Config>` command prompt so that you can use the appropriate commands from Table 3 to create default circuit definitions for traffic class handling.
Show	Displays the currently defined c-classes and assigned circuits from SRAM.
Exit	Returns you to the previous command level. See "Exiting a Lower Level Environment".

The following table lists BRS circuit commands Available from BRS [i x] Config> for PPP interfaces, BRS [i x] dlci [y] Config> prompt for Frame Relay circuits, and from the BRS [i x] [circuit defaults] Config> prompt.

Table 3. BRS Traffic Class Handling Commands

Command Function
? (Help) Displays all the commands available for this command level or lists the options for specific commands (if available). See "Getting Help".
Add-class Allocates a designated amount of bandwidth to a user-defined traffic class.
Create-super-class Defines the t-class called super-class.
Assign Assigns a protocol or filter to a configured traffic class.
Change-class Changes the amount of bandwidth configured for a bandwidth t-class.
Clear-block Clears the traffic class and protocol, filter, and tag assignment configuration data from SRAM for the PPP interface or Frame Relay circuit.
Note: This command cannot be used from the BRS [i x] [circuit defaults] Config> prompt.

Deassign Restores the queuing of the specified packet or filter to the default t-class and priority.
Default-class Sets the default t-class and priority to a desired value and assigns all unassigned protocols to the new default t-class.
Del-class Deletes a previously configured bandwidth t-class.
Disable Disables bandwidth reservation on the PPP interface or Frame Relay circuit.
Note: BRS cannot be enabled or disabled from the BRS [i x] [circuit defaults] Config> prompt.

Enable Enables bandwidth reservation on the PPP interface or Frame Relay circuit.
Note: BRS cannot be enabled or disabled from the BRS [i x] [circuit defaults] Config> prompt.

List Lists the configured t-classes and protocol, filter and tag assignments stored in SRAM.
Queue-length Sets the maximum and minimum values for the number of packets in a priority queue.
Note: This command is not supported at the BRS [i x] [circuit defaults] Config> prompt.

Show Displays the currently defined t-classes and protocol, filter, and tag assignments stored in RAM.
Note: This command is not supported at the BRS [i x] [circuit defaults] Config> prompt.

Tag Assigns a BRS tag name (TAG1 - TAG5) to a MAC filter that has been tagged during the configuration of the MAC Filtering feature.
Untag Removes the relationship between a BRS tag name (TAG1 - TAG5) and a MAC filter that has been tagged during configuration of the MAC filtering feature.
Use-circuit-defaults Allows the user to delete the circuit-specific definitions and use the circuit-defaults definitions for the traffic-class handling. This command is valid at the BRS [i x] dlci [y] Config> prompt for Frame Relay only.
Note: The router must be restarted in order for the defaults to become operational.

Exit Returns you to the previous command level. See "Exiting a Lower Level Environment".

Use the appropriate commands to configure bandwidth reservation for the Point-to-Point protocol (PPP) and Frame Relay. For Frame Relay, you need to configure the circuit and the network interface. For PPP, you only need to configure the network interface.

Notes:

When the clear-block, disable, enable, list, and show commands are issued from within the BRS interface menu, they affect or list the bandwidth reservation information configured for the selected interface. When these commands are issued from within the BRS circuit menu, only the Frame Relay bandwidth reservation information configured for the permanent virtual circuit (PVC) is affected or listed.
Before using the bandwidth reservation commands, keep the following in mind:
- You must use the interface command to select an interface before you use any other configuration commands. (BRS configuration enforces this.)
- The Class-name parameter is case-sensitive.
- To view the current class-names, use the list or show command.
- After you enable bandwidth reservation on an interface or circuit, you can add/delete/change circuit and traffic classes and assign circuits or protocols dynamically. The only commands that require a router restart before taking effect are the enable, disable, use-circuit-defaults, and clear-block commands.
You do not need to restart the router for t-class and c-class configuration changes to take effect.

Activate-IP-precedence-filtering

Use the activate-ip-precedence-filtering command to activate BRS IPv4 precedence filtering of APPN and SNA packets that are sent over a secure IP tunnel or that are in secondary TCP or UDP fragments. You also must configure the setting of the IPv4 precedence bits when you configure DLSw, HPR over IP or TN3270. See Using IP Version 4 Precedence Bit Processing for SNA Traffic in IP Secure Tunnels and Secondary Fragments for more information.

Syntax:

activate-ip-precedence-filtering

Add-circuit-class

Note:

Used only when configuring Frame Relay.

Use the add-circuit-class command at the interface level to allocate a designated amount of bandwidth to be used by the group of circuits assigned to the user-defined bandwidth c-class.

Syntax:

add-circuit-class: class-name %

Add-class

Use the add-class command to allocate a designated amount of bandwidth to a user-defined bandwidth t-class.
Note: If this command is used for a Frame Relay circuit that is currently using default circuit definitions for traffic class handling, you will be asked whether or not you want to override the default circuit definitions. If you answer "Yes", the circuit will be changed to use circuit-specific definitions for traffic class handling and the command will be allowed. If you answer "No", the command is aborted and default circuit definitions will continue to be used for the circuit. If you want to change the default circuit definitions, you should go to the BRS [i x][circuit defaults]Config> command prompt.

Syntax:

add-class: [class-name or class#] %

Example 1: Adding one class named CIRC17 on a Frame Relay circuit

 BRS [i 1] [dlci 17] Config>add-class
 This circuit is currently using circuit defaults...
 Are you sure you want to override the defaults ?(Yes or [No]):y
 Class name [DEFAULT]? CIRC17
 Percent bandwidth to reserve [10]?5
 BRS [i 1] [dlci 17] Config>list
 
 BANDWIDTH RESERVATION listing from SRAM
 bandwidth reservation is enabled
 interface number 1, circuit number 17
 maximum queue length 10, minimum queue length 3
 total bandwidth allocated 65%
 total classes defined (counting one local and one default) 5
 
 
 class LOCAL has 10% bandwidth allocated
   protocols and filters cannot be assigned to this class.
 
 
 class DEFAULT has 40% bandwidth allocated
   the following protocols and filters are assigned:
     protocol DNA with default priority is not discard eligible
     protocol VINES with default priority is not discard eligible
     protocol IPX with default priority is not discard eligible
     protocol OSI with default priority is not discard eligible
     protocol VOFR with default priority is not discard eligible
     protocol AP2 with default priority is not discard eligible
     protocol ASRT with default priority is not discard eligible
 
 
 class DEF1 has 5% bandwidth allocated
   protocol IP with priority NORMAL is not discard eligible.
 
 
 class DEF2 has 5% bandwidth allocated
  protocol ARP with priority NORMAL is not discard eligible.
 
 
 class CIRC171 has 5% bandwidth allocated
   no protocols or filters are assigned to this class.
 
 assigned tags:
 
 default class is DEFAULT with priority NORMAL

Example 2: Adding one class named class1 on a Frame Relay circuit

BRS [i 2] [dlci 128]>add
This circuit is currently using circuit defaults...
Are you sure you want to override the defaults ?(Yes or [No]): y
Class name [DEFAULT]?
Class is already allocated.
BRS [i 2] [dlci 128]>add class1
Percent bandwidth to reserve [10]?
BRS [i 2] [dlci 128]>
 
BRS [i 2] [dlci 128]>list
 
BANDWIDTH RESERVATION listing from SRAM
bandwidth reservation is enabled
interface number 2, circuit number 128
maximum queue length 10, minimum queue length 3
total bandwidth allocated 60%
total classes defined (counting one local and one default) 3
 
 
class LOCAL has 10% bandwidth allocated
  protocols and filters cannot be assigned to this class.
 
 
class DEFAULT has 40% bandwidth allocated
  the following protocols and filters are assigned:
    protocol IP with default priority is not discard eligible
    protocol ARP with default priority is not discard eligible
    protocol DNA with default priority is not discard eligible
    protocol VINES with default priority is not discard eligible
    protocol IPX with default priority is not discard eligible
    protocol OSI with default priority is not discard eligible
    protocol VOFR with default priority is not discard eligible
    protocol AP2 with default priority is not discard eligible
    protocol ASRT with default priority is not discard eligible
 
class class1 has 10% bandwidth allocated
  no protocols or filters are assigned to this class.
 
assigned tags:
 
default class is DEFAULT with priority NORMAL
 
BRS [i 2] [dlci 128]>

Assign

Use the assign command to assign specified tags, protocol packets, or filters to a given t-class and priority within that class. The four priority types include:

Urgent
High
Normal (the default priority)
Low.

Note: The protocol Voice over Frame Relay (VOFR) is used when voice packets are sent over a Frame Relay interface. If a circuit will carry voice packets only, assign only one t-class on the circuit and specify the protocol as VOFR. Only one t-class is allowed because one t-class does not have priority over another. If there is more than one t-class, a t-class that does not carry voice can get control of the bandwidth and interfere with the transmission of the voice traffic. To ensure that voice traffic will receive immediate transmission, VOFR traffic and VOFR traffic only should be given the priority type Urgent.
Fragmentation over Frame Relay as described in the enable fragmentation command in the chapter "Configuring and Monitoring Frame Relay Interfaces" in Access Integration Services Software User's Guide must be configured over the circuit if it will carry data traffic as well as voice. This is necessary so that large data packets will not use up the bandwidth and prevent the voice packets from getting through quickly enough.

Syntax:

assign: [protocol-class or TAG or filter-class] [class-name or class#]

The assign command also allows you to set the Discard-eligible (DE) bit for Frame Relay frames.
Note: If this command is used for a Frame Relay circuit that is currently using default circuit definitions for traffic class handling, you will be asked whether or not you want to override the default circuit definitions. If you answer "Yes", the circuit will be changed to use circuit-specific definitions for traffic class handling and the command will be allowed. If you answer "No", the command is aborted and default circuit definitions will continue to be used for the circuit. If you want to change the default circuit definitions, you should go to the BRS [i x][circuit defaults]Config> command prompt.

Example 1:

assign IPX test
priority <URGENT/HIGH/NORMAL/LOW>: [NORMAL]? low
protocol IPX maps to class test with priority LOW Discard eligible <yes/no> [N]?

Example 2: Assigning a TOS filter to class1; class1 has previously been added to the configuration using the add class command.

BRS [i 2] [dlci 128]>assign ?
IP
ARP
DNA
VINES
IPX
OSI
VOFR
AP2
ASRT
TUNNELING-IP
SDLC/BSC-IP
RLOGIN-IP
TELNET-IP
NETBIOS
SNA/APPN-ISR
SNMP-IP
MULTICAST-IP
DLSW-IP
TAG1
TAG2
TAG3
TAG4
TAG5
APPN-HPR
NETWORK-HPR
HIGH-HPR
MEDIUM-HPR
LOW-HPR
XTP-IP
UDP_TCP1
UDP_TCP2
UDP_TCP3
UDP_TCP4
UDP_TCP5
TOS1
TOS2
TOS3
TOS4
TOS5
Protocol or filter name [IP]? TOS1 (1)
Class name [DEFAULT]? class1 (2)
Priority  [NORMAL]?
Frame Relay Discard Eligible  [NO]?
TOS Mask [1-FF] [FF]? 
TOS Range (Low) [0-FF] [0]? 1
TOS Range (High) [1]? 3
BRS [i 2] [dlci 128]> list
 
BANDWIDTH RESERVATION listing from SRAM
bandwidth reservation is enabled
interface number 2, circuit number 128
maximum queue length 10, minimum queue length 3
total bandwidth allocated 60%
total classes defined (counting one local and one default) 3
 
 
class LOCAL has 10% bandwidth allocated
  protocols and filters cannot be assigned to this class.
 
 
class DEFAULT has 40% bandwidth allocated
  the following protocols and filters are assigned:
    protocol IP with default priority is not discard eligible
    protocol ARP with default priority is not discard eligible
    protocol DNA with default priority is not discard eligible
    protocol VINES with default priority is not discard eligible
    protocol IPX with default priority is not discard eligible
    protocol OSI with default priority is not discard eligible
    protocol VOFR with default priority is not discard eligible
    protocol AP2 with default priority is not discard eligible
    protocol ASRT with default priority is not discard eligible
 
 
class class1 has 10% bandwidth allocated
  the following protocols and filters are assigned:
    filter TOS1 with priority NORMAL is not discard eligible
       with TOS range x1 - x3 and TOS mask xFF
 
assigned tags:
 
default class is DEFAULT with priority NORMAL
 
BRS [i 2] [dlci 128]>show
 
BANDWIDTH RESERVATION currently in RAM
interface number 2, circuit number 128
maximum queue length 10, minimum queue length 3
3 current defined classes:
  class LOCAL has 10% bandwidth allocated
  class DEFAULT has 40% bandwidth allocated
  class class1 has 10% bandwidth allocated
 
protocol and filter assignments:
 
Protocol/Filter      Class              Priority    Discard Eligible
---------------      -----              --------    ----------------
IP                   DEFAULT              NORMAL             NO
ARP                  DEFAULT              NORMAL             NO
DNA                  DEFAULT              NORMAL             NO
VINES                DEFAULT              NORMAL             NO
IPX                  DEFAULT              NORMAL             NO
OSI                  DEFAULT              NORMAL             NO
VOFR                 DEFAULT              NORMAL             NO
AP2                  DEFAULT              NORMAL             NO
ASRT                 DEFAULT              NORMAL             NO
TOS1                 class1               NORMAL             NO
   with TOS range x1 - x3
    and TOS mask xFF
 
BRS [i 2] [dlci 128]>

(1)Using the TOS filter requires you to enter three parameters: TOS mask, TOS range-low, and TOS range- high. Refer to the command "Add" in the chapter "Configuring and Monitoring IP" in the Protocol Configuration and Monitoring Reference Volume 1 for a description of these parameters.

Assign-circuit

Note:

Used only when configuring Frame Relay.

Use the assign-circuit command at the interface level to assign the specified circuit to the specified bandwidth c-class. Use the DLCI when assigning a PVC to a circuit class and the circuit name when assigning an SVC to a circuit class.
Note: You must use the circuit command to enable BRS on the virtual circuit and restart or reload the router before you can use this command to assign the circuit to a circuit class.

Syntax:

assign-circuit: # class name

Change-circuit-class

Note:

Used only when configuring Frame Relay.

Use the change-circuit-class command at the interface level to change the percentage of the bandwidth to be used by the group of circuits assigned to the specified c-class.

Syntax:

change-circuit-class: class-name %

Change-class

Use the change-class command to change the amount of bandwidth configured for a bandwidth t-class.
Note: If this command is used for a Frame Relay circuit that is currently using default circuit definitions for traffic class handling, you will be asked whether or not you want to override the default circuit definitions. If you answer "Yes", the circuit will be changed to use circuit-specific definitions for traffic class handling and the command will be allowed. If you answer "No", the command is aborted and default circuit definitions will continue to be used for the circuit. If you want to change the default circuit definitions, you should go to the BRS [i x][circuit defaults]Config> command prompt.

Syntax:

change-class: [class-name or class#] %

Circuit

Note:

Used only when configuring Frame Relay.

Use the circuit command to configure a Frame Relay permanent virtual circuit (PVC) or switched virtual circuit (SVC). This command can only be issued from the BRS interface configuration prompt (BRS [i #] Config>).

Syntax:

circuit

Before you can use the add-class, assign, default-class, del-class, deassign, or change-class commands, you must enable BRS on the circuit and restart or reload the router.

PVC example:

  BRS [i 1] Config> circuit
  Circuit (PVC number or SVC name) to reserve bandwidth:  [16]
 
  BRS [i 1 ] [dlci 16] Config> enable

SVC example:

  BRS [i 1] Config> circuit
  Circuit (PVC number or SVC name) to reserve bandwidth:  [16] svc01
 
  BRS [i 1 ] [svc svc01] Config> enable

After the enable command is issued for the Frame Relay circuit and the router is restarted or reloaded, the following configuration commands are available for the circuit:

add-class deassign enable tag
assign default-class exit untag
change-class del-class list clear-block
disable show use-circuit-defaults

Clear-block

Use the clear-block command to clear the current bandwidth reservation configuration data from SRAM.

Syntax:

clear-block

If you enter this command from the interface prompt for PPP, all BRS configuration data is cleared for the interface.
If you enter this command from the interface prompt for Frame Relay, BRS is no longer enabled on the interface or on any circuits of the interface, and all circuit-class configuration data and default circuit definitions for traffic class handling are cleared. However, the traffic-class configuration data for each individual circuit is not cleared and is available if you re-enable BRS on the interface.
To clear a circuit's traffic-class configuration data, you first enter the circuit command from the interface-level prompt and then the clear-block command from the circuit-level prompt. After you have cleared the traffic-class configuration data for each circuit, enter the clear-block command from the interface-level prompt to clear the circuit-class configuration data. The changes do not take effect until the router is restarted or reloaded.

Example:

clear-block
You are about to clear BRS configuration information for this interface
Are you sure you want to do this (Yes or No): y
BRS [i 1] Config>

Create-super-class

Use the create-super-class command to configure a t-class called super-class on the PPP interface or Frame Relay circuit. Only one super-class can be configured for each PPP interface or Frame Relay circuit. No bandwidth percentage is associated with the super-class. Any protocol or filter data that is assigned to a super-class will be transmitted prior to protocol or filter data assigned to any other t-classes on the PPP interface or the Frame Relay circuit. A super-class for the Voice over Frame Relay (VOFR) protocol should be configured for a circuit that transports both voice and data packets. In this environment, configuring the super-class to carry voice helps to insure that voice packets get priority.

Syntax:

create-super-class

Deactivate-IP-precedence-filtering

Use the deactivate-ip-precedence-filtering command to deactivate IPv4 precedence filtering processing.

Syntax:

deactivate-ip-precedence-filtering

Deassign

Use the deassign command to restore the queuing of the specified protocol packet or filter to the default t-class and priority.
Note: If this command is used for a Frame Relay circuit that is currently using default circuit definitions for traffic class handling, you will be asked whether or not you want to override the default circuit definitions. If you answer "Yes", the circuit will be changed to use circuit-specific definitions for traffic class handling and the command will be allowed. If you answer "No", the command is aborted and default circuit definitions will continue to be used for the circuit. If you want to change the default circuit definitions, you should go to the BRS [i x][circuit defaults]Config> command prompt.

Syntax:

deassign: [prot-class or filter-class]

Deassign-circuit

Note:

Used only when configuring Frame Relay.

Use the deassign-circuit command at the interface level to restore the queuing of the specified circuit to the default c-class.

Syntax:

deassign-c: #

Default-circuit-class

Note:

Used only when configuring Frame Relay.

Use the default-circuit-class command at the interface level to set the user-defined name of the default bandwidth c-class and the percentage of the bandwidth allocated to that class of circuits, including orphans, that are not assigned to a bandwidth c-class.

Syntax:

default-circuit-class: class-name %

Del-circuit-class

Note:

Used only when configuring Frame Relay.

Use the del-circuit-class command at the interface level to delete the specified bandwidth c-class.

Syntax:

del-circuit-class: class-name

Default-class

Use the default-class command to set the default t-class and priority to a desired value. If no value has been previously assigned, system default values are used. Otherwise, the last previously assigned value is used.
Note: If this command is used for a Frame Relay circuit that is currently using default circuit definitions for traffic class handling, you will be asked whether or not you want to override the default circuit definitions. If you answer "Yes", the circuit will be changed to use circuit-specific definitions for traffic class handling and the command will be allowed. If you answer "No", the command is aborted and default circuit definitions will continue to be used for the circuit. If you want to change the default circuit definitions, you should go to the BRS [i x][circuit defaults]Config> command prompt.

Syntax:

default-cl: [class-name or class#] priority

Del-class

Use the del-class command to delete a previously configured bandwidth t-class from the specified interface or circuit.
Note: If this command is used for a Frame Relay circuit that is currently using default circuit definitions for traffic class handling, you will be asked whether or not you want to override the default circuit definitions. If you answer "Yes", the circuit will be changed to use circuit-specific definitions for traffic class handling and the command will be allowed. If you answer "No", the command is aborted and default circuit definitions will continue to be used for the circuit. If you want to change the default circuit definitions, you should go to the BRS [i x][circuit defaults]Config> command prompt.

Syntax:

del-class: [class-name or class#]

Disable

Use the disable command to disable bandwidth reservation on the interface (if entered from the interface prompt) or on the circuit (if entered from the circuit prompt). The changes do not take effect until the router is restarted or reloaded.

To verify that bandwidth reservation is disabled, enter the list command.

Syntax:

disable

Disable-hpr-over-ip-port-numbers

Use the disable-hpr-over-ip-port-numbers command to disable BRS filtering of HPR over IP traffic.

Syntax:

disable-hpr-over-ip-port-numbers

To verify that BRS filtering of HPR over IP traffic is disabled, enter the list command.
Note: If APPN is included in the load image, you configure whether or not HPR over IP traffic will be used at the APPN Config> command prompt.

Enable

Use the enable command to enable bandwidth reservation on the interface (if entered from the interface prompt) or the circuit (if entered from the circuit prompt). The changes do not take effect until the router is restarted or reloaded.

Syntax:

enable

Notes:

When configuring BRS on a PPP interface, issue the enable command at the interface prompt, and then restart or reload the router before configuring any traffic classes and assigning protocols and filters to traffic classes.

When BRS is initially enabled on a Frame Relay circuit, the circuit is initialized to use default circuit definitions for traffic class handling. Issue the enable command at the interface prompt and at the circuit prompt of each circuit for which you want to define traffic classes. Then restart or reload the router before configuring circuit classes for the interface and traffic classes for each circuit. For example:

 t 6
 Gateway user configuration
 Config>f brs
 Bandwidth Reservation User Configuration
 BRS Config>interface 1
 BRS [i 1] Config>enable
 Please restart router for this command to take effect
 BRS [i 1] Config>list
 
 BANDWIDTH RESERVATION listing from SRAM
 bandwidth reservation is enabled
 interface number 1
 maximum queue length 10, minimum queue length 3
 total bandwidth allocated 10%
 total circuit classes defined (counting one default) 1
 
 
 class DEFAULT has 10% bandwidth allocated
   no circuits are assigned to this class.
 
 default class is DEFAULT
 
 BRS [i 1] Config>circ 16
 BRS [i 1] [dlci 16] Config>enable
 Defaults are in effect for this circuit.
 Please restart router for this command to take effect.
 BRS [i 1] [dlci 16] Config>ex
 Please restart router for this command to take effect.
 BRS [i 1] [dlci 16] Config>
 *restore
 Are you sure you want to restart the gateway? (Yes or [No]): y

Enable-hpr-over-ip-port-numbers

Use the enable-hpr-over-ip-port-numbers command to enable BRS filtering of APPN-HPR over IP traffic and to configure UDP port numbers used to identify HPR over IP packets.
Note: If APPN is included in the load image, you enable HPR over IP and specify the UDP port numbers used for HPR over IP traffic at the APPN Config> command prompt.

Syntax:

enable-hpr-over-ip-port-numbers

Example:

BRS Config> enable-hpr-over-ip-port-numbers
XID exchange port number [12000]?
HPR net  trans prio port number [12001]?
HPR high trans prio port number [12002]?
HPR medium trans prio port number [12003]?
HPR low    trans prio port number [12004]?

XID exchange port number

This parameter specifies the UDP port number to be used for XID exchange. This port number must be the same as the one defined on other devices in the network.

Valid Values: 1024 - 65535

Default Value: 12000

Network priority port number

This parameter specifies the UDP port number to be used for network priority traffic. This port number must be the same as the one defined on other devices in the network.

Valid Values: 1024 - 65535

Default Value:12001

High exchange port number

This parameter specifies the UDP port number to be used for high priority traffic. This port number must be the same as the one defined on other devices in the network.

Valid Values: 1024 - 65535

Default Value:12002

Medium exchange port number

This parameter specifies the UDP port number to be used for medium priority traffic. This port number must be the same as the one defined on other devices in the network.

Valid Values: 1024 - 65535

Default Value:12003

Low exchange port number

This parameter specifies the UDP port number to be used for low priority traffic. This port number must be the same as the one defined on other devices in the network.

Valid Values: 1024 - 65535

Default Value:12004

Interface

Use the interface command to select the serial interface to which bandwidth reservation configuration commands will be applied. Bandwidth reservation is supported on routers running PPP (Point-to-Point Protocol) and Frame Relay interfaces.
Note: Bandwidth Reservation is not supported over Frame Relay subinterfaces. See Using Frame Relay Interfaces in Access Integration Services Software User's Guide for more information.

Syntax:

interface: interface#

Notes:

To enter bandwidth reservation commands for a new interface, this command must be entered before using any other bandwidth reservation configuration commands. If you have exited the bandwidth reservation prompt and wish to return to make bandwidth reservation changes to a previously configured interface, this command must again be entered first.
If WAN Restoral is used and BRS is configured on a primary interface, BRS should also be configured on the secondary interface. Typically when WAN Restoral is used, the secondary interface takes on the identity of the primary interface. This is not true for BRS; therefore, BRS needs to be configured on both the primary and secondary interfaces.

To enable Bandwidth Reservation on a particular interface, at the BRS Config> prompt, enter the number of the interface that supports the particular protocol or feature. You can then use the BRS Talk 6 enable command as described in this chapter. After enabling the interface number, you must restart or reload the 2212 for the command to take effect before you can make any other configuration changes to the interface.
Note: If you are configuring BRS on a Frame Relay interface, you can use the circuit command to select circuits and enable bandwidth reservation on those circuits before you restart or reload the router.

List

Use the list command to display currently defined bandwidth classes and their guaranteed percentage rates.

The list command and show command are similar. The list command displays the current SRAM definitions and the show command displays the current RAM definitions.

Syntax:

list: interface#

Depending on the prompt at which you issue the list command, various outputs are displayed. You can issue the list command from the following prompts:

BRS [i 1] [dlci 16] Config>
BRS [i 1] Config>
BRS Config>
BRS [i 1] [circuit defaults] Config>

Note: When you use this command from a Frame Relay circuit prompt (BRS [i x] [dlci y] Config>) it indicates if the circuit is using default circuit definitions or circuit-specific definitions for traffic class handling. If the circuit is using default circuit definitions, the traffic class, protocol, filter, and tag assignments currently defined for default circuit definitions are displayed. However, if you want to alter the default circuit definitions, you need to get to the BRS[i x] [circuit defaults] Config> prompt to make changes.

At the BRS interface level prompt (BRS [i 0]) for PPP interfaces and at the BRS circuit level prompt (BRS [i 0] [dlci 16] Config>) for Frame Relay interfaces, the list command lists the traffic classes, their configured bandwidth percentages, and the assigned protocols and filters.

At the BRS interface level prompt for Frame Relay, the list command lists the circuit classes, their configured bandwidth percentages, and the assigned circuits.

Example 1

BRS Config>list
 Bandwidth Reservation is available for 2 interfaces.
 
 Interface   Type            State
 ---------   ----            -----
         1   FR              Enabled
         2   PPP             Enabled
 
 The use of HPR over IP port numbers is disabled
 
 BRS Config>interface 1
 BRS [i 1] Config>list
 
 BANDWIDTH RESERVATION listing from SRAM
 bandwidth reservation is enabled
 interface number 1
 maximum queue length 10, minimum queue length 3
 total bandwidth allocated 10%
 total circuit classes defined (counting one default) 1
 
 
 class DEFAULT has 10% bandwidth allocated
   the following circuits are assigned:
       17
       16  using defaults.
       18  using defaults.
 
 default class is DEFAULT
 
 BRS [i 2] Config>exit
 BRS Config>interface 2
 BRS [i 2] Config>list
 
 BANDWIDTH RESERVATION listing from SRAM
 bandwidth reservation is enabled
 interface number 2
 maximum queue length 10, minimum queue length 3
 total bandwidth allocated 50%
 total classes defined (counting one local and one default) 2
 
 
 class LOCAL has 10% bandwidth allocated
   protocols and filters cannot be assigned to this class.
 
 
 class DEFAULT has 40% bandwidth allocated
   the following protocols and filters are assigned:
     protocol IP with default priority
     protocol ARP with default priority
     protocol DNA with default priority
     protocol VINES with default priority
     protocol IPX with default priority
     protocol OSI with default priority
     protocol VOFR with default priority
     protocol AP2 with default priority
     protocol ASRT with default priority
 
 assigned tags:
 
 default class is DEFAULT with priority NORMAL
 
 BRS [i 2] Config>

Example 2

 BRS [i 1] [dlci 17] Config>list
 
BANDWIDTH RESERVATION listing from SRAM
bandwidth reservation is enabled
maximum queue length 10, minimum queue length 3
total bandwidth allocated 60%
total classes defined (counting one local and one default) 3
 
 
class LOCAL has 10% bandwidth allocated
  protocols and filters cannot be assigned to this class.
 
 
class DEFAULT has 40% bandwidth allocated
  the following protocols and filters are assigned:
   protocol ASRT with priority NORMAL is not discard eligible
   filter NETBIOS with priority NORMAL is not discard eligible
 
 
class CLASS1 has 10% bandwidth allocated
  the following protocols and filters are assigned:
   protocol IP with priority NORMAL is not discard eligible
   protocol ARP with priority NORMAL is not discard eligible
   protocol DNA with priority NORMAL is not discard eligible
   protocol VINES with priority NORMAL is not discard eligible
   protocol IPX with priority NORMAL is discard eligible
   protocol OSI with priority NORMAL is not discard eligible
   protocol VOFR with priority NORMAL is not discard eligible
   protocol AP2 with priority NORMAL is not discard eligible

Example 3

 BRS [i 1] [circuit defaults] Config>list
 
 BANDWIDTH RESERVATION listing from SRAM
 bandwidth reservation is enabled
 interface number 1, default circuit
 maximum queue length 10, minimum queue length 3
 total bandwidth allocated 70%
 total classes defined (counting one local and one default) 4
 
 
 class LOCAL has 10% bandwidth allocated
   protocols and filters cannot be assigned to this class.
 
 
 
 class DEFAULT has 40% bandwidth allocated
   the following protocols and filters are assigned:
     protocol DNA with default priority is not discard eligible
     protocol VINES with default priority is not discard eligible
     protocol IPX with default priority is not discard eligible
     protocol OSI with default priority is not discard eligible
     protocol VOFR with default priority is not discard eligible
     protocol AP2 with default priority is not discard eligible
     protocol ASRT with default priority is not discard eligible
 
 
 class DEF1 has 10% bandwidth allocated
   protocol IP with priority NORMAL is not discard eligible.
 
 
 class DEF2 has 10% bandwidth allocated
  protocol ARP with priority NORMAL is not discard eligible.
 
 assigned tags:
 
 default class is DEFAULT with priority NORMAL
 
  BRS [i 1] [circuit defaults] Config>

Example 4

BRS Config>list
 Bandwidth Reservation is available for 2 interfaces.
 
 Interface   Type            State
 ---------   ----            -----
         1   FR              Enabled
         2   PPP             Enabled
 
 The use of HPR over IP port numbers is enabled.
 
    Transmission Type   Port Number
    -----------------   -----------
        XID exchange        12000
        HPR network         12001
        HPR high            12002
        HPR medium          12003
        HPR low             12004

Queue-length

Use the queue-length command to set the number of packets that can be queued in each BRS priority queue. Each BRS class has a priority value assigned to its protocols, filters, and tags, and each priority queue can store the number of packets that you specify with this command.

Syntax:

queue-length: maximum-length minimum-length

This command sets the maximum number of buffers that can be queued in each BRS priority queue as well as the maximum number that can be queued in each BRS priority queue when there is a shortage of router input buffers.

If you issue queue-length for a PPP interface, the command sets the queue-length values for each priority queue of each BRS t-class that is defined for the interface.

If you issue queue-length for a Frame Relay interface (at the prompt: BRS [i 0] Config>), the command sets the default queue-length values for each priority queue of each BRS t-class that is defined for each permanent virtual circuit of the interface.

If you issue queue-length for a Frame-Relay PVC (at a prompt like this: BRS [i 0] [dlci 16] Config>) the command sets the queue length values for each priority queue of each BRS t-class that is defined for the PVC. These values override the default queue length values set for the Frame Relay interface.

Attention: Do not use this command unless it is essential to do so. The default values for queue length are the recommended values for most users. If you set the values for queue length too high, you may seriously degrade the performance of your router.

Set-circuit-defaults

Use the set-circuit-defaults command to access the commands used to define default circuit definitions for traffic class handling. These default circuit definitions can then be used by any Frame Relay circuits on the interface that can use the same traffic classes and protocol, filter, and tag assignments.

Syntax:

set-circuit-defaults

Show

Use the show command to display currently defined bandwidth classes stored in RAM.

Syntax:

show: interface#

Depending on the prompt at which you issue the show command, various outputs are displayed. You can issue the show command from the following prompts:

BRS [i x] Config> - interface level prompt for interface number x.

BRS [i x] [dlci y] Config> - circuit level prompt for circuit y on Frame Relay interface number x. The following example shows the output of the show command from the circuit level prompt.

BRS [i 1] [dlci 17] Config>show
 
Protocol/Filter      Class              Priority    Discard Eligible
---------------      -----              --------    ----------------
IP                   CLASS1               NORMAL             NO
ARP                  CLASS1               NORMAL             NO
DNA                  CLASS1               NORMAL             NO
VINES                CLASS1               NORMAL             NO
IPX                  CLASS1               NORMAL             YES
OSI                  CLASS1               NORMAL             NO
VOFR                 CLASS1               NORMAL             NO
AP2                  CLASS1               NORMAL             NO
ASRT                 DEFAULT              NORMAL             NO
NETBIOS              DEFAULT              NORMAL             NO

At the interface prompt for PPP and the circuit prompt for Frame Relay, traffic class information is displayed. At the interface prompt for Frame Relay, circuit class information is displayed.

Notes:

When you use this command from a Frame Relay circuit prompt (BRS [i x] [dlci y] Config>) it indicates if the circuit is using default circuit definitions or circuit-specific definitions for traffic class handling. If the circuit is using default circuit definitions, the traffic class, protocol, filter, and tag assignments currently defined for default circuit definitions are displayed. However, if you want to alter the default circuit definitions, you need to get to the BRS [i x] [circuit defaults] Config> prompt to make changes.
This command cannot be used from the BRS [i x] [circuit defaults] Config> prompt.

Tag

Use the tag command to assign a MAC filter item that has been tagged during the configuration of the MAC filtering feature to the next available BRS tag name. The BRS tag names are TAG1, TAG2, TAG3, TAG4, and TAG5. You use the BRS tag name on the assign command to assign the tag to a BRS traffic class.

Syntax:

tag: mac_filter_tag#

Use the list command to list which MAC filter tags have been assigned to a BRS tag name and which BRS tag names have been assigned to a bandwidth traffic class.

Note: If this command is used for a Frame Relay circuit that is currently using default circuit definitions for traffic class handling, you will be asked whether or not you want to override the default circuit definitions. If you answer "Yes", the circuit will be changed to use circuit-specific definitions for traffic class handling and the command will be allowed. If you answer "No," the command is aborted and default circuit definitions will continue to be used for the circuit. If you want to change the default circuit definitions, you should go to the BRS [i x][circuit defaults]Config> command prompt.

Untag

Use the untag command to remove the MAC filter tag number and BRS tag name relationship. A tag can be removed only if its corresponding BRS tag name is not assigned to a bandwidth traffic class.

Syntax:

untag: mac_filter_tag#

Use the list command to show which MAC filter tags are assigned to a BRS tag name and which BRS tag names are assigned to a traffic class.
Note: If this command is used for a Frame Relay circuit that is currently using default circuit definitions for traffic class handling, you will be asked whether or not you want to override the default circuit definitions. If you answer "Yes", the circuit will be changed to use circuit-specific definitions for traffic class handling and the command will be allowed. If you answer "No", the command is aborted and default circuit definitions will continue to be used for the circuit. If you want to change the default circuit definitions, you should go to the BRS [i x][circuit defaults]Config> command prompt.

Use-circuit-defaults

Use the use-circuit-defaults command at the circuit level to delete the circuit-specific definitions and use the circuit default definitions for traffic-class handling. You will be prompted to confirm that you want to use the circuit defaults.

Syntax:

use-circuit-defaults

Notes:

This command is used only when configuring Frame Relay
The router must be restarted or reloaded for the defaults to become operational.

Example:

BRS [i 1] [dlci 17] Config>use-circuit-defaults
This circuit is currently NOT using circuit defaults...
 Are you sure you want to delete current definitions and use defaults ? (Yes or
 [No]): y
 Defaults are in effect for this circuit.
 Please restart router for this command to take effect.
 BRS [i 1] [dlci 17] Config>
 *restart
 Are you sure you want to restart the gateway? (Yes or [No]): y

Accessing the Bandwidth Reservation Monitoring Prompt

To access bandwidth reservation monitoring commands and to monitor bandwidth reservation on your router, do the following:

At the OPCON prompt (*), type talk 5.
At the GWCON prompt (+), type feature brs.
At the BRS> prompt, type interface #, where # is the number of the interface that you want to monitor. This takes you to the BRS interface-level prompt, BRS [i x]>, where x is the interface number.
For Frame Relay only, type circuit # at the interface prompt to specify the circuit on this interface that you want to monitor.
This takes you to the circuit-level prompt BRS [i x] [dlci y]>, where x is the interface number and y is the circuit number.
At the prompt, type the appropriate monitoring command. (Refer to "Bandwidth Reservation Monitoring Commands".)
The talk 5 (t 5) command lets you access the monitoring process.
The feature brs command lets you access the BRS monitoring process. You can enter this command by using either the feature name (brs) or number (1).
The interface # command selects the particular interface that you want to monitor for bandwidth reservation.
The circuit # command selects the DLCI of a Frame Relay permanent virtual circuit (PVC).
To return to the GWCON prompt at any time, type the exit command at the BRS> prompt.
Once you access the bandwidth reservation monitoring prompt (BRS>), you can enter any of the specific monitoring commands described in Table 4.

Bandwidth Reservation Monitoring Commands

This section summarizes and explains the Bandwidth Reservation monitoring commands. Table 4 shows the Bandwidth Reservation monitoring commands. The commands that can be used differ depending on the BRS monitoring prompt (BRS>, BRS [i x]>, or BRS [i x] [dlci y]>).

Table 4. Bandwidth Reservation Monitoring Command Summary

Command Used Only With FR Function
? (Help)
Displays all the commands available for this command level or lists the options for specific commands (if available). See "Getting Help"
Circuit yes Selects the DLCI of a Frame Relay permanent virtual circuit (PVC). To monitor Frame Relay bandwidth reservation traffic, you must be at the circuit prompt level.
Clear Clears the current t-class counters and stores them as last t-class counters. Counters are listed by class.
Clear-circuit-class yes Clears the current c-class counters and stores them as last c-class counters. Counters are listed by class.
Counters Displays the current t-class counters.
Counters-circuit-class yes Displays the current c-class counters.
Interface Selects the interface to monitor.
Note: This command must be entered before using any other bandwidth reservation monitoring commands.

Last Displays the last saved t-class counters.
Last-circuit-class yes Displays the last saved c-class counters.
Exit
Returns you to the previous command level. See "Exiting a Lower Level Environment"

Circuit

Note:

Used only when monitoring Frame Relay.

Use the circuit command to select the DLCI of a Frame Relay PVC for monitoring. This command can be issued only from the BRS interface monitoring prompt (BRS [i #]>).

Syntax:

circuit: permanent-virtual-circuit-#

After the Frame Relay circuit has been selected, the following commands can be used at the circuit prompt:

   CLEAR
   COUNTERS
   LAST
   EXIT

Clear

Use the clear command to save the current bandwidth reservation t-class counters so that they can be retrieved using the last command and clear the values. The counters are kept on a bandwidth traffic class basis.

Syntax:

clear

Clear-Circuit-Class

Note:

Used only when monitoring Frame Relay.

Use the clear-circuit-class command to save the current bandwidth reservation c-class counters so that they can be retrieved using the last-circuit-class command and clear the values. The counters are kept on a circuit class basis.

Syntax:

clear-circuit-class

Counters

Use the counters command to display statistics describing bandwidth reservation traffic for the traffic classes configured for a PPP interface or Frame Relay circuit.

Syntax:

counters

Example:

counters

Bandwidth Reservation Counters
interface number 1
Class            Pkt Xmit     Bytes Xmit     Bytes Ovfl     Pkt Ovfl    Q_len
 
LOCAL               10            914              0            0
   LOW               0              0              0            0        0
   NORMAL           10            914              0            0        0
   HIGH              0              0              0            0        0
   URGENT            0              0              0            0        0
DEFAULT             55           5555              0            0
   LOW               0              0              0            0        0
   NORMAL           20           5020              0            0        0
   HIGH              0              0              0            0        0
   URGENT           35            535              0            0        0
CLASS_1              5            910              0            0
   LOW               0              0              0            0        0
   NORMAL            5            910              0            0        0
   HIGH              0              0              0            0        0
   URGENT            0              0              0            0        0
CLASS_2             70           4123              0            0
   LOW              10            617              0            0        0
   NORMAL           55           3117              0            0        0
   HIGH              0              0              0            0        0
   URGENT            5            389              0            0        0
 
TOTAL              140          11502              0            0

Bytes Ovfl: Lists the number of bytes for packets that could not be transmitted because either the maximum queue-length was reached for a priority queue or the packet could not be queued because the priority queue was at the minimum queue length threshold and the packet came from an interface that was running low on receive buffers.
Pkt Ovfl: Lists the number of packets that could not be transmitted because either the maximum queue-length was reached for a priority queue or the packet could not be queued because the priority queue was at the minimum queue length threshold and the packet came from an interface that was running low on receive buffers.
Q_len: The current number of packets waiting for transmit on each of the priority queues within each traffic class.

Counters-circuit-class

Note:

Used only when monitoring Frame Relay.

Use the counters-circuit-class command to display statistics for the traffic classes configured for a Frame Relay circuit.

Syntax:

counters-circuit-class

Example:

counters-circuit-class

Bandwidth Reservation Circuit Class Counters
Interface 1
 
 
Class         Pkt Xmit     Bytes Xmit     Bytes Ovfl
DEFAULT             25           3402             26
CIRCLASS1            1             56              0
CIRCLASS2            0              0              0
 
TOTAL               26           3458             26

Interface

Use the interface command to select the serial interface to which bandwidth reservation monitoring commands will be applied. Bandwidth reservation is supported on routers running the PPP (Point-to-Point Protocol) and Frame Relay interfaces.

Syntax:

interface: interface#

Note: To enter bandwidth reservation commands for a new interface, this command must be entered before using any other bandwidth reservation monitoring commands. If you have exited the bandwidth reservation monitoring prompt (BRS>) and want to return to monitor bandwidth reservation, you must again enter this command first.

To monitor Bandwidth Reservation on a particular interface, at the BRS> monitoring prompt, type the number of the interface. You can then use bandwidth reservation monitoring commands as described in this chapter.

Last

Use the last command to display the last saved t-class statistics. The t-class statistics are displayed in the same format as they are for the counters command.

Syntax:

last

Last-circuit-class

Note:

Used only when monitoring Frame Relay.

Use the last-circuit-class command to display the last saved circuit class statistics. The c-class statistics are displayed in the same format as they are for the counters-circuit-class command.

Syntax:

last-circuit-class

Bandwidth Reservation Dynamic Reconfiguration Support

This section describes dynamic reconfiguration (DR) as it affects Talk 6 and Talk 5 commands.

CONFIG (Talk 6) Delete Interface

Bandwidth Reservation supports the CONFIG (Talk 6) delete interface command with no restrictions.

GWCON (Talk 5) Activate Interface

Bandwidth Reservation supports the GWCON (Talk 5) activate interface command with no restrictions.

All Bandwidth Reservation interface-specific commands are supported by the GWCON (Talk 5) activate interface command.

GWCON (Talk 5) Reset Interface

Bandwidth Reservation supports the GWCON (Talk 5) reset interface command with no restrictions.

All Bandwidth Reservation interface-specific commands are supported by the GWCON (Talk 5) reset interface command.

CONFIG (Talk 6) Immediate Change Commands

Bandwidth Reservation supports the following CONFIG commands that immediately change the operational state of the device. These changes are saved and are preserved if the device is reloaded, restarted, or you execute a dynamically reconfigurable command.

Commands
GWCON, feature brs, activate-ip-precedence-filtering
GWCON, feature brs, deactivate-ip-precedence-filtering
GWCON, feature brs, enable-hpr-over-ip-port-numbers
GWCON, feature brs, disable-hpr-over-ip-port-numbers
GWCON, feature brs, interface, add-circuit-class
GWCON, feature brs, interface, assign-circuit
GWCON, feature brs, interface, change-circuit-class
GWCON, feature brs, interface, deassign-circuit
GWCON, feature brs, interface, default-circuit-class
GWCON, feature brs, interface, del-circuit-class
GWCON, feature brs, interface, disable
GWCON, feature brs, interface, enable
GWCON, feature brs, interface, queue-length
GWCON, feature brs, interface, add-class
Note: This command can also be used at the circuit level for Frame Relay interfaces.

GWCON, feature brs, interface, assign
Note: This command can also be used at the circuit level for Frame Relay interfaces.

GWCON, feature brs, interface, change-class
Note: This command can also be used at the circuit level for Frame Relay interfaces.

GWCON, feature brs, interface, create-super-class
Note: This command can also be used at the circuit level for Frame Relay interfaces.

GWCON, feature brs, interface, deassign
Note: This command can also be used at the circuit level for Frame Relay interfaces.

GWCON, feature brs, interface, default-class
Note: This command can also be used at the circuit level for Frame Relay interfaces.

GWCON, feature brs, interface, del-class
Note: This command can also be used at the circuit level for Frame Relay interfaces.

GWCON, feature brs, interface, disable
Note: This command can also be used at the circuit level for Frame Relay interfaces.

GWCON, feature brs, interface, enable
Note: This command can also be used at the circuit level for Frame Relay interfaces.

GWCON, feature brs, interface, tag
Note: This command can also be used at the circuit level for Frame Relay interfaces.

GWCON, feature brs, interface, untag
Note: This command can also be used at the circuit level for Frame Relay interfaces.

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