On Friday, June 29, 2012 07:39:06 PM Florian Lohoff wrote: > The only bug we have had so far was IPv6 native going > down on an interface when looping externally e.g. DWDM > transport and not getting back up until ipv6 is removed > from and added to the interface again. We monitor IPv6 > interface operational state seperately since that event. > Reason is a failed Duplicat Adress Detection which is > not retried after shut/no shut or link state change.
Hit that one too - it's an IOS XR issue, not so much an
ASR9000 one, as we run into it on the CRS.
Last I heard from Cisco is that it is likely expected
behaviour because the RFC implies the same, i.e., DAD
conflicts are not cleared automatically (I'll be honest, I
haven't verified this claim in the RFC itself).
That said, Cisco have a command to fix this issue
interactively:
clear ipv6 duplicate address
Mark.
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