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List:       zebra
Subject:    [zebra 19184] Equal cost multi-path problem
From:       "kamatchi soundaram" <kamatchi () tdd ! sj ! nec ! com>
Date:       2003-05-28 1:56:18
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Hi,

 Assume a test set-up, in which two routers R1 and R2 connected by two
Numbered p2p links and also both have one broadcast (ethernet) interface.
Assume R1's eth is network N1 and R2's eth is network N2 and both routers
and networks are in the same area 0. And R2 is configured as ASBR.

 Initially all interfaces cost is 10.
R1's routing table:
Dest    cost    next-hop
R2       10      via P1 and P2 (R2's P1 and P2 p2p interface ip address)
N2       20      Via P1 & P2.

Once i chage the R1's P1 interface cost to "5"
The route table should be as shown below:
Dest  Cost  next-hop
R2     5       via P1 (and R2's P1 interface ip address)
N2    15     via P1  (and R2's P1 interface ip address)


but the zebra-ospf routing table shows wrongly as below:
Dest    cost   next-hop
R2       5      via P1 & P2
N2      15    via P1 and P2

So, eventhough the cost has been changed for one interface, the route table
shows "with the same lower cost, the destination (N2 and R2) reachable via
both the interfaces P1 and P2??

Does anyone face this problem. Any fix made on this??

Thanks in advance,
GKS.



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