LECS Policies Add

The LECS uses criteria called assignment policies to assign a client to an ELAN and to the associated LES. You can add, change, or remove assignment policies. You can also create composite assignment policies by specifying multiple assignment policies of the same priority. Policies with equal priority are considered at the same time and are ANDed together.

Each assignment policy has an associated priority. Lower numbers indicate higher priority.

The Policies Add option adds a policy to the LECS. When adding a policy, you are prompted for the priority and type of the policy.

Priority specifies the order in which policies are considered; policies with lower priorities are considered earlier.

There are six types of assignment policies:

  1. Enter the priority of the policy you want to add to the list of configured policies.

    Policies with equal priority are considered at the same time and are ANDed together.

  2. Select the policy type.

Select the Submit button.


LECS Policies Disable

The Policies Disable option disables a policy in the static configuration of the LECS. Disabled policies will not become active on the next reload of the MSS Server.

Select the policy you want to disable from the list of choices.

Select the Submit button.


LECS Policies Enable

The Policies Enable option enables a policy in the static configuration of the LECS. Enabled policies will become active on the next reload of the MSS Server.

Select the policy you want to enable from the list of choices.

Select the Submit button.


LECS Policies Remove

The Policies Remove option removes a policy from the static configuration of the LECS.

Select the policy you want to remove from the list of choices.

Select the Submit button.


LECS Remove

The LECS Remove option removes the LECS from the static configuration of the MSS Server. Click the small button if you want to remove all other objects associated with the LECS (for example, policies and ELANs) from the static configuration.

Select the Submit button.


LECS Search ATM Address

The LECS Search option provides search keys to simplify configuration management. Each search key represents some unique aspect of LE Servers or LE Clients (ATM address, MAC address, name of ELAN, etc.).

Enter the ATM address prefix you want to search.

Click back for a list of the aspects for which you can search.

Select the Submit button.


LECS Search LES

The LECS Search option provides search keys to simplify configuration management. Each search key represents some unique aspect of LE Servers or LE Clients (ATM address, MAC address, name of ELAN, etc.).

Select the ATM address of the LES you want to search for.

Click back for a list of the aspects for which you can search.

Select the Submit button.


LECS Search MAC Address

The LECS Search option provides search keys to simplify configuration management. Each search key represents some unique aspect of LE Servers or LE Clients (ATM address, MAC address, name of ELAN, etc.).

Enter the MAC adress you want to search for.

Click back for a list of the aspects for which you can search.

Select the Submit button.


LECS Search Name of ELAN

The LECS Search option provides search keys to simplify configuration management. Each search key represents some unique aspect of LE Servers or LE Clients (ATM address, MAC address, name of ELAN, etc.).

Enter the ELAN name you want to search for.

Click back for a list of the aspects for which you can search.

Select the Submit button.


LECS Search Route Descriptor

The LECS Search option provides search keys to simplify configuration management. Each search key represents some unique aspect of LE Servers or LE Clients (ATM address, MAC address, name of ELAN, etc.).

Enter the route descriptor you want to search for.

Click back for a list of the aspects for which you can search.

Select the Submit button.


LECS Set Address

This option enables you to change the address of the LECS. This is the local ATM address of the LECS. At the ATM switches, you may also configure the well-known LECS address to be associated with this local ATM address.

  1. Select the End System Identifier (ESI) you want to be assigned to the LECS.

  2. Enter the Selector (in hex) you want to be assigned to the LECS.

    Valid Values: any one octet value in the range of 00 - FF that has not already been assigned to a LAN Emulation component.

Select the Submit button.


LECS Set Enable-Disable

This option enables or disables the LECS. If the LECS is disabled, it will not be started the next time the MSS Server is reloaded.

The selection acts as a toggle. If you remove the check from the Enabled field, the LECS is disabled.

Select the Submit button.


LECS Set Maximum Number of VCCs

This option sets the maximum number of configuration direct VCCs that the LECS supports at one time.

Valid Values: integers in the range of 1 to 128

Default Value: 128

If the actual number of VCCs to the LECS exceeds this number, the LECS releases all VCCs that have not been used in the number of seconds specified by the VCC idle time.

Enter the maximum number of simultaneous VCCs you want the LECS to support at one time.

Select the Submit button.


LECS Set Reserved Bandwidth Maximum

This option sets the maximum bandwidth (in Kbps) that the LECS accepts on any reserved bandwidth configuration direct VCC.

This rate is the maximum acceptable Sustained Cell Rate for the configuration direct VCC. This rate is used for both forward and backward directions on the configuration direct VCC.

Enter an integer Kbps for the value of the Sustained cell rate.

Valid Values: integer Kbps in the range of 0 - line speed of the ATM device.

Default Value: 0

Select the Submit button.


LECS Set Trace Mask

Packet tracing is a troubleshooting tool that allows you to see what is actually being transmitted between different components of the network. This information, along with Event Logging System messages, allows you to diagnose problems or provide trace information to network support. If you are having trouble as the result of information flow (as opposed to network up/down crashes), you can use packet tracing to figure out what is going on.

You can specify an ATM address filter for packet tracing. For each VCC, if the ATM address of the entity at the other end of the VCC matches the ATM-address-value on all bits set by the ATM-address-mask, then packet tracing may be performed on that VCC.

The ATM address value is compared with the bit string result of logically ANDing the ATM address trace filter mask that you specify and the calling party's ATM address. If the resulting bit string and the ATM address filter value match, and if packet tracing is enabled, then traffic over that VCC will be traced.

In order to see the packet traces, use the 'view' facility of the Event Logging System (ELS) (use the operator console in Talk5 of the Command Line Interface).

Example:

Trace all packets over all VCCs whose calling party ATM addresses contains the following network prefix.

Value: 0x3999999999999900009999070700000000000000

Mask: 0xFFFFFFFFFFFFFFFFFFFFFFFFFF00000000000000

ATM address of Pkt(1): 0x3999999999999900009999070710005A670AB502

ATM address of Pkt(2): 0x3999999999999911119999070710005A820D4401

Packet 1 will be traced and Packet 2 will not be traced.

Enter the ATM Address Trace Filter Mask value.

This value can be any 20-byte hexadecimal string. It is not required to be an actual ATM address.

For packet tracing to occur, you must enable it in the ELS subsystem. Enter a buffer size and number of bytes to be traced. Then issue 'trace subsystem lecs'.

Select the Submit button.


LECS Set Trace Value

Packet tracing is a troubleshooting tool that allows you to see what is actually being transmitted between different components of the network. This information, along with Event Logging System messages, allows you to diagnose problems or provide trace information to network support. If you are having trouble as the result of information flow (as opposed to network up/down crashes), you can use packet tracing to figure out what is going on.

You can specify an ATM address filter for packet tracing. For each VCC, if the ATM address of the entity at the other end of the VCC matches the ATM-address-value on all bits set by the ATM-address-mask, then packet tracing may be performed on that VCC.

The ATM address value is compared with the bit string result of logically ANDing the ATM address trace filter mask that you specify and the calling party's ATM address. If the resulting bit string and the ATM address filter value match, and if packet tracing is enabled, then traffic over that VCC will be traced.

In order to see the packet traces, use the 'view' facility of the Event Logging System (ELS) (use the operator console in Talk5 of the Command Line Interface).

Example:

Trace all packets over all VCCs whose calling party ATM addresses contains the following network prefix.

Value: 0x3999999999999900009999070700000000000000

Mask: 0xFFFFFFFFFFFFFFFFFFFFFFFFFF00000000000000

ATM address of Pkt(1): 0x3999999999999900009999070710005A670AB502

ATM address of Pkt(2): 0x3999999999999911119999070710005A820D4401

Packet 1 will be traced and Packet 2 will not be traced.

Enter the ATM Address value.

This value can be any 20-byte hexadecimal string. It is not required to be an actual ATM address.

For packet tracing to occur, you must enable it in the ELS subsystem. You should enter a buffer size and number of bytes to be traced. Then issue 'trace subsystem lecs'.

Select the Submit button.


LECS Set Validate Best Effort Peak Cell Rate

At the sending side of the network, data frames are broken into very short blocks called cells. At the destination side of the network, the cells are reassembled into data frames.

When you configure the LECS to validate best effort PCR, the peak cell rate (specified while setting up each VCC) is examined. If the peak cell rate is greater than the line rate, the requested VCC is rejected.

Select the check to validate Best Effort PCR.

Leave the check field blank for no validation.

Select the Submit button.


LECS Set VCC Idle Time

Enter the number of seconds (of idle time) a VCC can remain idle and not be released.

Select the Submit button.


Set ELAN Name for LES-BUS

Enter the name of a new ELAN, or select an ELAN name from the list of choices.

This ELAN will use the LES-BUS that you are configuring.

Valid Values: any alphanumeric character string of length in the range of 1 to 32 characters.

Select the Submit button.


Add LES-BUS

Use the LES-BUS Add option to specify the type, ESI, and selector of this LES-BUS.

Each LES-BUS must have a unique ELAN name, and the combination of ESI and selector must be unique among all LE components.

  1. Select an ELAN type from the list of choices.

  2. Select an ESI from the list of choices.

  3. Select the Submit button.

  4. Enter a Selector value to be used for this LES/BUS.

    Valid Values: any octet value in the range of x'00' to the number of reserved selectors per ESI value

    Default Value: The default selector will be in the range of x'02' to the number of reserved selectors per ESI value

Select the Submit button.


Set Address for LES-BUS

This option specifies the ESI and the selector components of the ATM address of the LES-BUS.

Select the ESI from the list of choices.

You can modify the address of an existing LES-BUS.

Select the Submit button.


Enable Redundancy

This option enables redundancy.

  1. Select the Redundancy protocol role.

  2. Select the Submit button. If you selected Primary LES-BUS, you are prompted for the ATM address of the Backup LES-BUS.

    Valid Values: any valid ATM address

    Default Value: none

Select the Submit button.


Set Broadcast Static Entries for LES-BUS

This option defines static entries for the Broadcast Manager (BCM).

Broadcast Management is an enhancement of the BUS function in LAN Emulation. Without Broadcast Management, every broadcast and multicast frame sent to the BUS is forwarded to all LAN Emulation clients on the ELAN. Also, clients that are serving as proxy for other stations then forward the broadcast frame on to other LAN segments.

When Broadcast Management is enabled, BCM attempts to transform broadcast frames into unicast frames and sends them only to interested LAN Emulation clients and end stations. Reduced broadcast traffic results in fewer nuisance frames sent to clients and an overall reduction in network utilization.

You can statically configure a LEC to receive all managed broadcasts for a BCM managed protocol.

When enabled for IP, Broadcast Manager scans all IP ARP requests and replies to learn the location of IP addresses in the subnet containing the ELAN. Broadcast Manager then takes each broadcast ARP request frame and forwards it as a unicast frame directly to the LEC representing the IP station.

When enabled for IPX, Broadcast Manager dynamically identifies the set of IPX routers and servers based on IPX Routing Information Protocol and Service Advertising Protocol advertisement transmissions and forwards these RIP/SAP advertisements only to other IPX routers and servers. You may want to configure a network management station to monitor RIP/SAP broadcasts in order to discover the IPX topology. You accomplish this by configuring the network management station as a static target for IPX broadcasts. This causes the station to receive RIP/SAP broadcasts.

Any device that requires reception of IPX advertisements that does not transmit advertisements must be configured as a Static Target. An example would be a station running software that discovers IPX network topology by monitoring IPX advertisements. Broadcast Manager for IPX is not aware of this "quiet" station without a Static Target definition of its MAC address and the address of the representing LEC.

A Static Target also can be used effectively when many IPX Routers and Servers are represented by a single LEC. By configuring a Static Target with the ATM address of the LEC, but with a broadcast MAC address of all Fs, all IPX Routers and Servers behind the LEC receive a single broadcast advertisement rather than multiple unicast advertisements.

  1. Enter the ATM address.

    Valid Values: any valid ATM address

    Default Value: none

  2. Enter the MAC address of the Static Entry to identify it on the network.

    Valid Values: any valid MAC address

    Default Value: none

Select the Submit button.


Set BUS Monitor Duration of Sample

Enter the sample time (in seconds) of each BUS Monitor sample.

This is the time during which samples are taken, as compared to the time between samples, which is the time during which the BUS Monitor waits before taking another sample.

Valid Values: integer number of seconds in the range of 1 to 600.

Default Value: 10 seconds

Select the Submit button.


Set BUS Monitor Sample Rate

BUS Monitor allows system administrators to identify clients that over-utilize the BUS or are improperly configured. Administrators can eliminate these clients from the ELAN, freeing BUS resources for other users.

Enter the Frame Sampling rate.

This value specifies the rate at which the BUS Monitor samples frames sent to the BUS during a duration of sample. A value of 10 means that 1 out of every 10 frames is sampled.

Valid Values: An integer number of seconds in the range of 1 to 1000.

Default Value: 10

Select the Submit button.


Set BUS Monitor Time Between Samples

Enter the number of minutes between sample intervals.

This is the time between the start of one BUS Monitor duration of sample and the start of the next duration of sample. Time between samples is the time during which the BUS Monitor waits before taking another sample, as compared to the duration of sample, which is the time during which samples are taken.

Valid Values: An integer number of minutes in the range of 1 to 1000.

Default Value: 30

Select the Submit button.


Set BUS Monitor Top Number of MACs

This parameter specifies the number of MAC addresses to be recorded with the highest quantity of sampled frames sent to the BUS in a sample interval. For example, if you specify 10 users, the 10 top users will be identified by their MAC addresses.

Enter the number of top MAC addresses to record.

Valid Values: An integer number of MAC addresses in the range of 1 to 100.

Default Value: 10

Select the Submit button.


Set Control Timeout

This option sets the control timeout, in seconds, for the LE Server. This is the period used for timing out request/response frame interactions.

Enter the Control timeout value.

Valid Values: An integer number of seconds in the range of 10 to 300

Default Value: 120

This parameter maps to the S4 parameter in the ATM Forum LAN Emulation Over ATM Specification.

Select the Submit button.