Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 364)

346 Brocade ICX 6650 Layer 3 Routing Configuration Guide
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Filtering
Matching based on next-hop router
To construct match statements for a route map that match based on the IP address of the next-hop
router, use either of the following methods. 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 the next-hop router, enter commands such as the
following.
Brocade(config)#route-map HopMap permit 1
Brocade(config-routemap HopMap)#match ip next-hop 2
Syntax: match ip next-hop num
Syntax: match ip next-hop prefix-list name
The num parameter with the first command specifies an IP ACL and can be a number from 1
through 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 the chapter “Rule-Based IP ACLs” in the Brocade ICX 6650 Security
Configuration Guide.
The name parameter with the second command specifies an IP prefix list name. To configure an IP
prefix list, refer to
“Defining IP prefix lists” on page 340.
Matching based on the route source
To match a BGP4 route based on its source, use the match ip route-source statement. Here is an
example.
Brocade(config)#access-list 10 permit 192.168.6.0 0.0.0.255
Brocade(config)#route-map bgp1 permit 1
Brocade(config-routemap bgp1)#match ip route-source 10
The first command configures an IP ACL that matches on routes received from 192.168.6.0/24.
The remaining commands configure a route map that matches on all BGP4 routes advertised by
the BGP4 neighbors whose addresses match addresses in the IP prefix list. You can add a set
statement to change a route attribute in the routes that match. You also can use the route map as
input for other commands, such as the neighbor and network commands and some show
commands.
Syntax: match ip route-source ACL | prefix name
The ACL | prefix name parameter specifies the name or ID of an IP ACL, or an IP prefix list.
Matching on routes containing a specific set of communities
Brocade software enables you to match routes based on the presence of a community name or
number in a route, and to match when a route contains exactly the set of communities you specify.
To match based on a set of communities, configure a community ACL that lists the communities,
then compare routes against the ACL, as shown in the following example.
Brocade(config)#ip community-list standard std_1 permit 12:34 no-export
Brocade(config)#route-map bgp2 permit 1
Brocade(config-routemap bgp2)#match community std_1 exact-match