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This article mainly introduces how to configure PBR+SLA, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

This paper mainly describes the diversion of data packets through policy routing PBR and IP service level protocol SLA.

Suppose: the default route is set to 192.168.1.0 on Outside, and the next line points to R6: ip route 0.0.0.0 255.255.255.0 1.1.56.6

Requirements: but packets from the source IP:5.5.5.5/32 must go to R4: and ensure the availability of the link:

R5 basic configuration:

Interface Loopback0

Ip address5.5.5.5 255.255.255.255

Interface FastEthernet1/0

Ip address 1.1.56.5 255.255.255.0

Interface FastEthernet1/1

Ip address 1.1.45.5 255.255.255.0

Ip policy route-map AAA

Ip local policy route-map AAA

Ip route 0.0.0.0 0.0.0.0 1.1.56.6

Route-map AAA permit 10

Match interface Loopback0

Set ip next-hop 1.1.45.4

R5#debug ip policy

R5#ping 4.4.4.4 sou lo0: note here: if the traffic is generated locally, the route-map does not match by default. You need to enable: [ip local policy route-map AAA]: to make the local traffic match AAA:

* Dec 3 18 len 48 Dec 32.823: IP: slots 5.5.5.5 (local), dice 4.4.4.4, len 100, policy match

* Dec 3 18 item 48 item 32.823: IP: route map AAA, item 10, permit

* Dec 3 18 FastEthernet1/1 48 local 32.827: IP: slots 5.5.5.5 (local), dudes 4.4.4.4 (FastEthernet1/1), len 100, policy routed

* Dec 3 18 local to FastEthernet1/1 48V 32.827: IP: local to FastEthernet1/1 1.1.45.4

At this point, if you shut down the F1amp1 interface of R4: at this time R5 and pingR4: is the link normal?

Explanation: route-map cannot tell whether the next hop is reachable. But it can be implemented in combination with SLA:

Ip sla monitor 1

Type echo protocol ipIcmpEcho1.1.45.4

Frequency 10

Ip sla monitor schedule 1 life forever start-time now

Track 2 rtr 1

Route-map AAA permit 10

Match interface Loopback0

Set ip next-hop verify-availability 1.1.45.4 1 track 2

R5#ping4.4.4.4 sou lo0: note here: if you turn off the F1 route-map of R4 at this time, the policy will not be implemented even if the traffic matches it. Go to the normal routing table: for more information, please see the following debug information.

Wan30#debug ip policy

* Dec 3 18 len 49 len 42.115: IP: slots 5.5.5.5 (local), dice 4.4.4.4, len 100, policy match

* Dec 3 18 item 49 item 42.115: IP: route map AAA, item 10, permit

* Dec 3 18 len 49 len 42.115: IP: slots 5.5.5.5 (local), dice 4.4.4.4, len 100, policy rejected-- normal forwarding

Through the above configuration experiments, packet shunting is realized.

Thank you for reading this article carefully. I hope the article "how to configure PBR+SLA" shared by the editor will be helpful to everyone. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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