From: 2008ccie@live.com
Date: Wed Jun 11 2008 - 19:05:04 ART
Hi experts,
!
I am facing a routing loop in my lab scenario
if anyone help me I will really appreciate.
!
sorry for my simplified scenario because if I post my full config it will take
a long email
R2
SW3--| <FR> R1---R4
R3
!
SW3,R2 and R3 running EIGRP 100
R1,R2 and R3 running OSPF 1 area
R1 and R4 running OSPF area 2
!
R2 and R3 learn EIGRP external route from SW1 and EIGRP<>OSPF redistributed
vice versa
!
R2 and R3 learn these EIGRP redistributed OSPF routes via R1.
Based on the AD behavior (OSPF 110 EIGRP ex 170) R2 and R3 choose EIGRP
external OSPF's routes next hope is R1
so it cause loops
in R2 and R3 I changed the EIGRP external routes distance via "distance EIGRP
90 95" command, now R2 and R3's EIGRP external routes next hope is SW3 now the
problem is solved.
!
My other problem is
R2 and R3 learn OSPF external routes via R1 from R4, and it's redistributed
into EIGRP
now these EIGRP's external routes with AD 95 selected as the best route
compared with OSPF's AD 110 and its next hope is each other I mean R3 select
these routes (R4 EX OSPF routes) next hope R2 vice versa. so it causing loop.
(R2 learn those routes (R4 EX OSPF routes) via EIGRP from R3 and vice versa)
!
How to solve these problem?
I hope experts surely understand what I am trying to saying.
I will really appreciate your input.
!
Thanks
Rahul
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