Dell PowerConnect B-RX Configuration Manual page 880

26
Filtering
The next-hop <address-filter-list> parameter compares the IP address of the route's next hop to the
specified IP address filters. The filters must already be configured.
The route-type internal | external-type1 | external-type2 parameter applies only to OSPF routes.
This parameter compares the route's type to the specified value. The level-1 parameter compares
ISIS routes only with routes within the same area. The level-2 parameter compares ISIS routes only
with routes in different areas, but within a domain. The level-1-2 parameter compares ISIS routes
with routes the same area and in different areas, but within a domain.
The tag <tag-value> parameter compares the route's tag to the specified tag value.
The following sections are some examples of how to configure route maps that include match
statements that match on ACLs.
Matching based on AS-path ACL
To construct a route map that matches based on AS-path ACL 1, enter the following commands.
BigIron RX(config)# route-map PathMap permit 1
BigIron RX(config-routemap PathMap)# match as-path 1
Syntax: match as-path <num>
The <num> parameter specifies an AS-path ACL and can be a number from 1 – 199. You can
specify up to five AS-path ACLs. To configure an AS-path ACL, use the ip as-path access-list
command. Refer to "Defining an AS-path ACL" on page 795.
Matching based on community ACL
To construct a route map that matches based on community ACL 1, enter the following commands.
BigIron RX(config)# ip community-list 1 permit 123:2
BigIron RX(config)# route-map CommMap permit 1
BigIron RX(config-routemap CommMap)# match community 1
Syntax: match community <string>
The <string> parameter specifies a community list ACL. To configure a community list ACL, use the
ip community-list command. Refer to "Defining a community ACL" on page 798.
Matching based on destination network
You can use the results of an IP ACL or an IP prefix list as the match condition.
To construct a route map that matches based on destination network, enter commands such as
the following.
BigIron RX(config)# route-map NetMap permit 1
BigIron RX(config-routemap NetMap)# match ip address 1
Syntax: match ip address <ACL-name-or-num>
Syntax: match ip address prefix-list <name>
The <name-or-num> parameter with the first command specifies an IP ACL and can be a number
from 1 – 199 or the ACL name if it is a named ACL. To configure an IP ACL, use the ip access-list or
access-list command. Refer to Chapter 21, "Access Control List".
The <name> parameter with the second command specifies an IP prefix list name. To configure an
IP prefix list, refer to "Defining and applying IP prefix lists" on page 799.
804 BigIron RX Series Configuration Guide
53-1002253-01