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show ipv6 neighbors - STALE

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

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show ipv6 neighbors - STALE

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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New Member

show ipv6 neighbors - STALE

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.

show ipv6 neighbors - STALE

hi michael,

thanks for your input! will read further on the said RFC.

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