changing specific routes for eigrp with different AD in NXOS

[zulkarnain]

Hi All.

I have a situation here where I got specific routes need to change the AD in EIGRP. I attached the diagram.

SW5# show ip route 10.176.10.0
IP Route Table for VRF "default"
'*' denotes best ucast next-hop
'**' denotes best mcast next-hop
'[x/y]' denotes [preference/metric]
'%<string>' in via output denotes VRF <string>

10.176.10.0/24, ubest/mbest: 2/0
*via 10.188.35.1, Eth1/41, [170/1587712], 00:16:15, eigrp-LAB, external
*via 10.188.57.2, Eth1/47, [170/1587712], 00:16:17, eigrp-LAB, external
SW5#

I want to change the AD for 10.176.10.0/24 via 10.188.57.2 (Eth1/47) to become 180 so that it will less preferred.

How to achieve that? I have tried to do at SW7

1. change distance table-map in the 10.188.57.2 (SW7) but it does not propagate to SW5.

2. use ip summary-address eigrp LAB 10.176.10.0/24 180 in SW7 toward SW2 interface also did not propagate the AD.

Thank You

[Giuseppe Larosa · Accepted solution]

Hello @zulkarnain ,

in your network scenario playing with AD on switch07 does not provide anything on switch SW05. You can try to use offset-list that can increase the delay component of metric to achieve your goal.

AD is not advertised in EIGRP updates so you need to act on the composite metric.

Hope to help

Giuseppe

[David Ruess]

Hello,

You can achieve this multiple ways:

First as @Giuseppe Larosa mentioned you can create an offset list referencing an ACL with the specified network you want to affect.

-You can increase the delay in the interface going to SW7 but that will affect all networks

-You can put the summary on SW3 of the exact route of 10.176.10.0/24 and a summary on SW7 of a less specific route like 10.176.0.0/16 (not quite that efficient).

Hope this helps

-David

[Elliot Dierksen]

You could also change the bandwidth on the interface going to SW7. You could also use a route-map as an inbound distribute list to alter metrics (bandwidth/delay) on certain routes.