Dell PowerConnect B-FCXs, Руководство по настройке

Страница: 1085 / 1494

PowerConnect B-Series FCX Configuration Guide 1043
53-1002266-01
Filtering
30
If the route map contains set statements, routes that are permitted by the route map match
statements are modified according to the set statements.
Match statements compare the route against one or more of the following:
•
The route BGP4 MED (metric)
•
A sequence of AS-path filters
•
A sequence of community filters
•
A sequence of address filters
•
The IP address of the next hop router
•
The route tag
•
For OSPF routes only, the route type (internal, external type-1, or external type-2)
•
An AS-path ACL
•
A community ACL
•
An IP prefix list
•
An IP ACL
For routes that match all of the match statements, the route map set statements can perform one
or more of the following modifications to the route attributes:
•
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 on the basis of the
length of the AS-path.
•
Add a user-defined tag to the route or add 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 router.
•
Set the origin to IGP or INCOMPLETE.
•
Set the weight.
For example, when you configure parameters for redistributing routes into RIP, one of the optional
parameters is a route map. If you specify a route map as one of the redistribution parameters, the
router will match the route against the match statements in the route map. If a match is found and
if the route map contains set statements, the router will set attributes in the route according to the
set statements.
To create a route map, you define instances of the map. Each instance is identified by a sequence
number. A route map can contain up to 50 instances.
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.
PowerConnect(config)#route-map GET_ONE permit 1
PowerConnect(config-routemap GET_ONE)#
Syntax: [no] route-map <map-name> permit | deny <num>