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Re: Juniper <-> Cisco IPv6 BGP peering
From: Jack Bates <jbates () brightok net>
Date: Wed, 07 Dec 2011 16:42:33 -0600

On 12/7/2011 4:30 PM, Randy Carpenter wrote:

BGP is working fine, it is when they are trying to forward the packets back to me. They are seeing the Link-Local as 
the next-hop, which, for some reason, they cannot get to.

Your subject is misleading. It appears to be an NDP problem. Check configs and firewall rules on both sides to make sure NDP isn't being interrupted.

I've not seen any NDP compatibility problems between IOS 12.2SR, 12.3T, and Junos 9.3, 9.6, 10.4. However, there are several vendor commands as well as firewall rulesets, which could NDP itself.


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