122 Brocade ICX 6650 Security Configuration Guide
53-1002601-01
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-length command 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-list command.
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-name permit | deny num
The map-name is 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.