Asymmetrical routing issue

Unanswered Question
Jul 20th, 2008

Hi all

May i know how do i know if issue (symtoms) in network is due to Asymmetrical routing ?

How do I use trceroute to test for Asymmetrical routing.

Please help

I have this problem too.
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Steve Lyons Sun, 07/20/2008 - 05:42

To determine if you have asymmetric routing you will need to use trace route from the source to destination and then from the destination back to the source. If the information provided by trace route shows the packets are traversing different routers then you have asymmetric routing.

Steve Lyons - Cisco

caijunjie Sun, 07/20/2008 - 06:07

Hi Steve

Thanks for the quick reply. Can I say that when i trace from A --> B, i get a sequence of 5 hops for example, than i trace from

B --> A, it would be also the same 5 hops but reverse in sequence if asymmetric routing is not present?

Thanks in advance

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