Brocade Virtual ADX Switch and Router Guide (Supporting ADX v03.1.00) - Manual (Page 267)

Brocade Virtual ADX Switch and Router Guide 253
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Filtering
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• Prepend AS numbers to the front of the route AS-path. By adding AS numbers to the AS-path,
you can cause the route to be less preferred when compared to other routes based on the
length of the AS-path.
• Add a user-defined tag an automatically calculated tag to the route.
• Set the community value.
• Set the local preference.
• Set the MED (metric).
• Set the IP address of the next-hop device.
• Set the origin to IGP or INCOMPLETE.
• Set the weight.
• Set a BGP4 static network route.
When you configure parameters for redistributing routes into BGP4, one of the optional parameters
is a route map. If you specify a route map as one of the redistribution parameters, the device
matches the route against the match statements in the route map. If a match is found and if the
route map contains set clauses, the device sets the attributes in the route according to the set
clauses.
To create a route map, you define instances of the map by a sequence number.
To define a route map, use the procedures in the following sections.
Entering the route map into the software
To add instance 1 of a route map named “GET_ONE” with a permit action, enter the following
command.
Virtual ADX(config)# route-map GET_ONE permit 1
Virtual ADX(config-routemap GET_ONE)#
Syntax: [no] route-map map-name permit | deny num
As shown in this example, the command prompt changes to the route map level. You can enter the
match and set clauses at this level. Refer to
“Specifying the match conditions” on page 254 and
“Setting parameters in the routes” on page 258.
The map-name is a string of characters that names the map. Map names can be up to 32
characters in length.
The permit | deny parameter specifies the action the device will take if a route matches a match
statement:
• If you specify deny, the device does not advertise or learn the route.
• If you specify permit, the device applies the match and set clauses associated with this route
map instance.
The num parameter specifies the instance of the route map you are defining.
To delete a route map, enter a command such as the following. When you delete a route map, all
the permit and deny entries in the route map are deleted.
Virtual ADX(config)# no route-map Map1
This command deletes a route map named Map1. All entries in the route map are deleted.
To delete a specific instance of a route map without deleting the rest of the route map, enter a
command such as the following.