So following on from a very old thread
https://puck.nether.net/pipermail/cisco-nsp/2008-May/051088.html
I have had an event where an interface got stuck in stalled state for
much longer than is desirable. I tried to fix it using "ipv6 nd dad
attempts 5" but no luck. I also tried disabling and enabling IPv6 on
the interface that also didn't work. Manually setting the link-local
address (and setting back) fixed things, but I have a few questions.
Does DAD just stay in stalled state until some kind of manual
intervention takes place? (Perhaps there is a method of have periodic
retires?)
Does "ipv6 nd dad attempts 5" help? How often are attempts made by
default. I am thinking this could help prevent the stalled state in the
future.
This for IOS 15.2(4)S1 on an ASR1k.
Thanks
Ivan
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