EIGRP offset list route-map in n7k

[Josh Sprang]

Can someone shed some light on the following N7k EIGRP command:

{ip | ipv6} offset-list eigrp instance-tag {prefix-list name| route-map name} {in | out} offset

I have two neighbors connected on the same LAN segment/Interface VLAN.  Right now I am learning routes ECMP and I would like to prefer one neighbors prefix over the other.

I tried to use the IOS distance command but it does not allow you to select a neighbor using this in NX-OS from what I have seen.  Can the route-map influence a neighbor using match route-source or match ip next-hop.  So if I have neighbor 192.168.1.1 and 192.168.1.2 and I was to prefer routes from 192.168.1.1 I can:

ip prefix-list all-routes 0.0.0.0/0 le 32

ip prefix-list not-preferred 192.168.1.2/32

route-map off-set permit 10

match  route-source prefix-list not-preferred

int eth3/1

ip offset-list eigrp 100 prefix-list all-routes route-map off-set in 1000

Will this add 1000 to the metric of routes learned from 192.168.1.2 and not influence the metric to 192.168.1.1?

Thanks..

[Aaron Harrison]

Hi

Looks like you want 'match ip route-source' (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx-os/unicast/configuration/guide/l3_cli_nxos/l3_rpm.html#wp1071532). Otherwise looks OK to me.

Also may need to ensure that your outbound advertised routes don't result in the inbound traffic to this site routing over the non-preferred route.

Aaron

[Josh Sprang]

Just wanted to let you know I tried this out and it appears to be working.  I'll update once I do a full test thanks

[Aaron Harrison]

Great!

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