Brocade Communications Systems 6650 manual Configuring the route map

Policy Based Routing

If you prefer to specify the wildcard (mask value) in CIDR format, you can enter a forward slash after the IP address, then enter the number of significant bits in the mask. For example, you can enter the CIDR equivalent of “10.157.22.26 0.0.0.255” as “10.157.22.26/24”. The CLI automatically converts the CIDR number into the appropriate ACL mask (where zeros instead of ones are the significant bits) and changes the non-significant portion of the IP address into zeros. For example, if you specify 10.157.22.26/24 or 10.157.22.26 0.0.0.255, then save the changes to the startup-config file, the value appears as 10.157.22.0/24 (if you have enabled display of subnet lengths) or 10.157.22.0 0.0.0.255 in the startup-config file.

If you enable the software to display IP subnet masks in CIDR format, the mask is saved in the file in “/mask-bits” format. To enable the software to display the CIDR masks, enter the ip show-subnet-lengthcommand at the global CONFIG level of the CLI. You can use the CIDR format to configure the ACL entry regardless of whether the software is configured to display the masks in CIDR format.

NOTE

If you use the CIDR format, the ACL entries appear in this format in the running-config and startup-config files, but are shown with subnet mask in the display produced by the show ip access-listcommand.

The host source-ip hostname parameter lets you specify a host IP address or name. When you use this parameter, you do not need to specify the mask. A mask of all zeros (0.0.0.0) is implied.

The any parameter configures the policy to match on all host addresses.

NOTE

Do not use the log option in ACLs that will be used for PBR.

Configuring the route map

After you configure the ACLs, you can configure a PBR route map that matches based on the ACLs and sets routing information in the IP traffic.

NOTE

The match and set statements described in this section are the only route-map statements supported for PBR. Other route-map statements described in the documentation apply only to the protocols with which they are described.

To configure a PBR route map, enter commands such as the following.

Brocade(config)# route-map test-route permit 99

Brocade(config-routemap test-route)# match ip address 99

Brocade(config-routemap test-route)# set ip next-hop 192.168.2.1

Brocade(config-routemap test-route)# exit

The commands in this example configure an entry in a route map named “test-route”. The match statement matches on IP information in ACL 99. The set statement changes the next-hop IP address for packets that match to 192.168.2.1.

Syntax: [no]route-map map-namepermit deny num

The map-nameis a string of characters that names the map. Map names can be up to 32 characters in length. You can define an unlimited number of route maps on the Brocade device, as long as system memory is available.

122	Brocade ICX 6650 Security Configuration Guide
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