PBR/Static routes or other? Help!

[Ableton34]

Hi all,

After some advice, we have a project where I work to divert traffic across a back up link as a test.

Basically we have two campus sites with 2 links between them,a WAN link provided by standard ISP and a back up link direct between the 2 sites which is 1gb compared to the 100mb WAN.

We have been asked to come up with implementation to divert all traffic from campus 2 to campus 1 (core) on the back up link.

We are using EIGRP in the LAN to route all traffic currently over the WAN.

Now would I use PBR to push all traffic originating at campus 2 across the back up, would this be the best option? If so would the access list used be something like eg:

access-list 1 permit 192.168.10.0 0.0.0.255

route-map (name) permit 10

match ip address 1

set ip next-hop (ip address of the router at the campus 2 end of the back up link)

interface vlan 10

ip policy route-map (name)

Presumably if the back up link fails then normal EIGRP would resume and push traffic back over the WAN? Is this correct or do I need IP sla?

Or is there another way, the customer wants us to use routing priorities and supernets but I am not sure this is the way to go, simple PBR should do this right?

thanks in advance

Ableton

[Jon Marshall]

Steve

Not sure what you mean by supernets unless you mean advertise a supernet across the main link and the more specific subnets across the backup link.

This would work without needing to manipulate metrics because the more specific routes will always be used.

So you could on the main link advertise a supernet with the "ip eigrp summary-address ..." command. And on the backup link just advertise the more specific subnets and it will work.

Note also that if you want the traffic to use the same return path ie. the backup link you will need to do both ends.

Jon

[paul driver]

Hello

You could manipulate the eigpp metric of the Primary advertising eigrp router via a distribute list?

Example:

advetising routers 1.1.1.1  -Primary
advetising routers 2.2.2.2 - Backup

access-list 10 permit any
router eigrp xxx
distance 91  1.1.1.1 0.0.0.0 10

res

Paul

the

[rosaho]

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