show ipv6 neighbors - STALE

Answered Question
Feb 7th, 2012

hi all,

i'm trying to study IPv6 since we're going to use it on our network very soon. i would like to know what STALE means on the output for this show command. appreciate if a link can also be provided. thanks in advance!

Router1#show ipv6 neighbors

IPv6 Address                              Age Link-layer Addr State Interface

2001:DB8:1:1:C803:17FF:FED4:1D              5 ca03.17d4.001d  STALE Fa0/0

FE80::C803:17FF:FED4:1D                     5 ca03.17d4.001d  STALE Fa0/0

I have this problem too.
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Correct Answer by Michael Vincent about 2 years 2 months ago

It's a normal part of IPv6 neighbor discovery.  Check out RFC 4861, section 5.1.

Basically, the neighbor is no longer known to be reachable (timer expired, no traffic lately, whatever) and reachability will be 'verfied' once traffic is sent to the neighbor again.

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Correct Answer
Michael Vincent Tue, 02/07/2012 - 18:15

It's a normal part of IPv6 neighbor discovery.  Check out RFC 4861, section 5.1.

Basically, the neighbor is no longer known to be reachable (timer expired, no traffic lately, whatever) and reachability will be 'verfied' once traffic is sent to the neighbor again.

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Posted February 7, 2012 at 5:23 PM
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