This chapter describes how to access the MAC Filtering configuration and monitoring prompts and how to use the available commands. It includes the following sections:
Use the feature command from the CONFIG process to access the MAC filtering configuration commands. The feature command lets you access configuration commands for specific features outside the protocol and network interface configuration processes.
Enter a question mark after the feature command to obtain a listing of the features available for your software release. For example:
Config> feature ?
WRS
BRS
MCF
Feature name or number [MCF]?
To access the MAC filtering configuration prompt, enter the feature command followed by the feature number (3) or short name (MCF). For example:
Config> feature mcf MAC Filtering user configuration Filter config>
Once you access the MAC filtering configuration prompt, you can begin entering specific configuration commands. To return to the CONFIG prompt at any time, enter the exit command at the MAC filtering configuration prompt.
This section summarizes the MAC filtering configuration commands. Enter these commands at the Filter config> prompt.
Use the following commands to configure the MAC filtering feature.
Table 6. MAC Filtering Configuration Command Summary
| Command | Function |
|---|---|
| ? (Help) | Displays all the commands available for this command level or lists the options for specific commands (if available). See "Getting Help". |
| Attach | Adds a filter list to a filter. |
| Create | Creates a filter list or an INPUT or OUTPUT filter. |
| Default | Sets the default action for the specified filter to EXCLUDE, INCLUDE, or TAG. |
| Delete | Removes all information associated with a filter list. Also deletes a filter that was created using the create filter command. |
| Detach | Removes a filter list from a filter. |
| Disable | Disables MAC Filtering entirely or disables a particular filter. |
| Enable | Enables MAC Filtering entirely or enables a particular filter. |
| List | Lists a summary of all the filter lists and filters configured by the user. Also generates a list of attached filter lists for this filter and all subsequent information for the filter. |
| Move | Reorders the filter lists attached to a specified filter. |
| Reinit | Re-initializes the entire MAC Filtering system from an updated configuration, without affecting the rest of the router. |
| Set-Cache | Changes the cache size for a filter. |
| Update | Adds or deletes information from a specific filter list. Brings you to a menu of appropriate subcommands. |
| Exit | Returns you to the previous command level. See "Exiting a Lower Level Environment". |
Use the attach command to add a filter-list to a filter.
A filter is constructed by associating a group of filter-lists with an interface number. A filter-list is built from one or more filter-items.
Syntax:
Use the create command to create a filter-list or an INPUT or OUTPUT filter.
Syntax:
Use the default command to set the default action for the filter with a specified filter number to exclude, include, or tag.
Syntax:
Use the delete command to remove all information associated with a filter-list and to free an assigned string as a name for a new filter-list. If filter-list is attached to a filter that has already been created by the user, then this command will display an error message on the console without deleting anything. In addition all filter-items belonging to this list are also deleted
This command also deletes a filter that was created using the create filter command.
Syntax:
If the filter-list is attached to a filter that has already been created by the user, then this command will display an error message on the console without deleting anything. All filter-items belonging to this list are also deleted when this command is used.
Use the detach command to delete a filter-list name (filter-list parameter) from a filter (filter-number parameter).
Syntax:
Use the disable command to disable MAC Filtering entirely or to disable a particular filter.
Syntax:
Use the enable command to enable MAC Filtering entirely or to enable a particular filter.
Syntax:
Use the list command to list a summary of all the filter-lists and filters configured by the user. A list of all the filter-lists attached to a filter is not given. Other information displayed includes:
In addition, the following information is displayed for each filter:
This command also generates a list of attached filter-lists for this filter and all subsequent information for the filter.
Syntax:
Use the move command to reorder the filter-lists attached to a specified filter (given by filter-number parameter). The list given by Filter-list-name1 is moved immediately before the list given by Filter-list-name2.
Syntax:
Use the reinit command to re-initialize the entire MAC Filtering system from an updated configuration, without affecting the rest of the router.
Syntax:
Use the set-cache command to change the default cache size (16) to a number in the range 4 to 32768.
Syntax:
Use the update command to add information to or delete information from a specific filter-list. Using this command with the desired filter-list-name brings you to the Filter filter-list-name Config> prompt for that specific filter-list. From this new prompt you can then change information in the specified list.
The new prompt level is used to add or delete filter-items from filter-lists. The order in which the filter-items are specified for a given filter-list is important as it determines the order in which the filter-items are applied to a packet.
Syntax:
This section summarizes the MAC filtering configuration subcommands.
Enter these subcommands at the Filter filter-list-name config>
prompt.
Table 7. Update Subcommands Summary
| Subcommand | Function |
|---|---|
| ? (Help) | Displays all the commands available for this command level or lists the options for specific commands (if available). See "Getting Help". |
| Add | Adds source or destination MAC address filters or a window filter. Adds filter-items to a filter-list. |
| Delete | Removes filter-items from a filter-list. |
| List | Lists a summary of all the filter-lists and filters configured by the user. Also generates a list of attached filter-lists for this filter and all subsequent information for the filter. |
| Move | Reorders the filter-lists attached to a specified filter. |
| Set-Action | Sets a filter-item to evaluate the INCLUDE, EXCLUDE or TAG (with a tag-number option) condition. |
| Exit | Returns you to the previous command level. See "Exiting a Lower Level Environment". |
Use the following subcommands to update a filter-list.
Use the add subcommand to add filter-items to a filter-list. This subcommand specifically lets you add a hexadecimal number to compare against the source or destination MAC address, or a sequence of window data with a mask to compare against a packet data.
The order in which the filter-items are added to a given filter-list is important because it determines the order in which the filter-items are applied to a packet.
Each use of the add subcommand creates a filter-item within the filter-list. The first filter-item created is assigned filter-item-number 1, the next one is assigned number 2, and so on. After you enter a successful add subcommand, the router displays the number of the filter-item just added.
The first match that occurs stops the application of filter-items, and the filter-list evaluates to INCLUDE, EXCLUDE, or TAG, depending on the designated action of the filter-list. If none of the filter-items of a filter-list produces a match, then the default action (INCLUDE, EXCLUDE or TAG) of the filter is returned.
The hex-mask parameter must be the same length as hex-MAC-address and is logically ANDed with the designated MAC address in the packet. The default hex-mask argument is to be all binary 1s.
The hex-MAC-addr parameter can be specified in canonical or noncanonical bit order. A canonical bit order is specified as just a hex number (for example, 000003001234). It may also be represented as a series of hex digits with a hyphen (-) between every two digits (for example, 00-00-03-00-12-34).
A noncanonical bit order is specified as a series of hex digits with a colon (:) between every two digits (for example, 00:00:C9:09:66:49). MAC addresses of filter-items will always be displayed using either a hyphen (-) or a colon (:) to distinguish canonical from noncanonical representations.
Use the delete subcommand to remove filter-items from a filter-list. You delete filter-items by specifying the filter-item-number assigned to the item when it was added.
When the delete subcommand is used, any gap created in the number sequence is filled in. For example, if filter-items 1, 2, 3, and 4 exist and filter-item 3 is deleted, then filter-item 4 will be renumbered to 3.
Syntax:
Use the list subcommand to print out a listing of all the filter-item records. The following information about each MAC-Address filter-item is displayed:
Syntax:
The move subcommand reorders filter-items within the filter-list. The filter-item whose number is specified by filter-item-name1 is moved and renumbered to be just before filter-item-name2.
Syntax:
The set-action subcommand lets you set a filter-item to evaluate the INCLUDE, EXCLUDE, or TAG (with a tag-number option) condition. If one of the filter-items of the filter-list matches the contents of the packet being considered for filtering, the filter-list will evaluate to the specified condition. The default setting is INCLUDE.
Syntax:
Use the feature command from the GWCON process to access the MAC filtering monitoring commands. The feature command lets you access monitoring commands for specific router features outside of the protocol and network interface monitoring processes.
Enter a question mark after the feature command to obtain a listing of the features available for your software release. For example:
+ feature ?
WRS
BRS
MCF
To access the MAC filtering monitoring prompt, enter the feature command followed by the feature number (3) or short name (MCF). For example:
+ feature mcf
MAC Filtering user monitoring
Filter>
Once you access the MAC filtering monitoring prompt, you can begin entering specific monitoring commands. To return to the GWCON prompt at any time, enter the exit command at the MAC Filtering monitoring prompt.
This section summarizes the MAC filtering monitoring commands. Enter
these commands at the Filter> prompt.
Table 8. MAC Filtering Monitoring Command Summary
| Command | Function |
|---|---|
| ? (Help) | Displays all the commands available for this command level or lists the options for specific commands (if available). See "Getting Help". |
| Clear | Clears the "per filter" statistics listed in the list filter command. |
| Disable | Disables MAC Filtering globally or on a "per filter" basis. |
| Enable | Enables MAC Filtering globally or on a "per filter" basis. |
| List | Lists a summary of statistics and settings for each filter currently running in the router. |
| Reinit | Re-initializes the entire MAC Filtering system from an updated configuration, without affecting the rest of the router. |
| Exit | Returns you to the previous command level. See "Exiting a Lower Level Environment". |
Use the following commands to monitor the MAC filtering feature.
Use the clear command to clear filter statistics.
Syntax:
Use the disable command to disable MAC filtering globally. This command does not individually disable each filter.
The command also disables a filter as specified by filter-number. This filter is disabled without modifying configuration records. If no argument is given, MAC filtering is globally disabled.
Syntax:
Use the enable command to enable MAC filtering globally. This command does not individually enable each filter.
The command also enables a filter as specified by filter-number. This filter is enabled without modifying configuration records. If no argument is given, MAC filtering is globally enabled.
Syntax:
Use the list command to list a summary of statistics and settings for each filter currently running in the router. The following information is displayed for each filter when the list all command is used:
In addition, the following information is also displayed by the list filter command for a specified filter:
Syntax:
Use the reinit command to re-initialize the entire MAC Filtering system from an updated configuration, without affecting the rest of the router.
Syntax:
This section describes dynamic reconfiguration (DR) as it affects Talk 6 and Talk 5 commands.
MAC Filtering supports the CONFIG (Talk 6) delete interface command with no restrictions.
MAC Filtering supports the GWCON (Talk 5) activate interface command with the following consideration:
If there are any MAC filters defined for the newly activated interface, then all MAC filters for every interface are reinitialized.
All MAC Filtering interface-specific commands are supported by the GWCON (Talk 5) activate interface command.
MAC Filtering supports the GWCON (Talk 5) reset interface command with the following consideration:
If there are any MAC filters defined for the newly reset interface, then all MAC filters for every interface are reinitialized.
All MAC Filtering interface-specific commands are supported by the GWCON (Talk 5) reset interface command.
MAC Filtering supports the following MAC Filtering-specific GWCON (Talk 5) reset command:
All MAC Filtering commands are supported by the GWCON, feature mcf, reinit command.
MAC Filtering supports the following CONFIG (Talk 6) activate command:
All MAC Filtering commands are supported by the CONFIG, feature mcf, reinit command.