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Yehey (TechnicalUser) (OP)
20 Apr 08 4:49
HI all,

I have a remote router (R1) with 2 neighbors routers (R2 & R3) using EIGRP. EIGRP chooses R2 as its default route.

My questions is, what would be the effect in the default route if i used the "distribute-list" command in R1 due to a bouncing link between R1 and R2?

Ex.  R1(config)# access?list 20 deny any
     R1(config)# router eigrp 1
     R1(config?router)# no passive?interface serial 0
     R1(config?router)# distribute?list 20 out serial 0

I know that when the distribute-list command is configured on an interface, all outgoing routing updates only will be blocked and all incoming routing updates will be allowed, making R2 continuously send routing updates to R1.


Thanks  
burtsbees (Programmer)
20 Apr 08 11:06
Is R1 directly connected to R2 AND R3?

Burt
Yehey (TechnicalUser) (OP)
20 Apr 08 12:53
Yes Burt.

R2 is directly connected via serial 0 and R3 is directly connected via serial 1.  

Thanks
burtsbees (Programmer)
20 Apr 08 19:49
Are you trying to minimize the effects of a flapping interface? The distribute-list command will stop updates from going to R2, so any return traffic would maybe need a static route in R2. What are R2 and R3 going to? Different networks, or are they redundantly set up going to the same destinations? If so, then I would use static routing between R1 and R2, and R2 to whatever, and configure the default route in R1 to R3, but with a higher metric.

Burt
Yehey (TechnicalUser) (OP)
21 Apr 08 0:33
Burt,

R1-R2 is my primary connection and R1-R3 is the resilient connection going to the same destination. EIGRP would set R3 as my default route because of the distribute-list command, but im going to have problems with my return routes coming from R2 since R1 is still getting routing updates from R2. :D

Thanks.

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