EIGRP ROUTE SELECTION.

[Ramirov]

Hi guys , I have a simple question , which is the best way to prefer a router over another route , for example in this scenario.

             g0/0----------------g0/0

SW1(L3)                                          R2

             g0/1----------------g0/1

R2#sh ip eigrp neighbors

IP-EIGRP neighbors for process 100

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

0 1.1.1.1 Gig0/0 14 00:20:53 40 1000 0 75

1 2.2.2.1 Gig0/1 13 00:20:39 40 1000 0 73

D 192.168.1.1/32 [90/130816] via 1.1.1.1, 00:07:44, GigabitEthernet0/0

                             [90/130816] via 2.2.2.1, 00:07:44, GigabitEthernet0/1

So I want to use just one path to reach 192.168.1.1 , I read that the best way is modified the interface delay parameter , but I think that is the best way if you have two devices to the same destination.

The only method that I tried was modified AD on R2 .

distance 91 1.1.1.1 0.0.0.0  

Its works , but I dont know if this is the best way .. .....

Thanksssss in advance.

[Giuseppe Larosa · Accepted solution]

Hello Ramirov,

 changing the AD has effects only on the local router.

If there are other routers behind R2 downstream they still see two equal cost paths.

if you change the interface delay on one interface on R2 side you should achieve the same result  (or not)

Alternatively you can use offset-lists to add delay to some routes on R2 on some selected routes.

This would allow you to perform some form of per prefix load sharing.

for different alternatives see the following document

https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/13673-14.pdf?dtid=osscdc000283

Hope to help

Giuseppe

[Ramirov]

You are right ! thanks !