6.2 Policy-based Routing

PBR (policy-based routing) is allows user manually to defined policy that how to received packets should be routed and also allows user to identify packets using several attributes to specify the next hop to which the packet should be sent.

route-mapmap-name [deny permit] sequence-number – to define the condition for policy routing

match ip address access-list number – to specify the condition by access-list

match length min max – to establish criteria based on packet length.

set ip next-hopip address for next hop – to specify the next-hop router in path that packets should be forward.

ip policy route-mapmap name – identify a route map to use for policy routing on an interface.

set interface type of interface – specify a list of interface which the packets can be routed.

traceroute Trace route to destination address - discovers the routes packets follow when traveling to their destinations

Configuration Example

router# show run

Building configuration ...

service password-encryption service timestamps debug

!

hostname router

!

enable password 7 wonRBhc01DcE

!

interface fastethernet 0/0

ip address 192.168.98.63 255.255.255.0

!

interface serial 0/0 encapsulation hdlc

ip address 10.0.0.2 255.0.0.0 ip policy route-map richard

!

interface async 0/0

!

77