discussion: Enabling IPv6 on Cisco 6500/7600 breaks IPv4 Internet connectivity

Bernhard Schmidt berni at birkenwald.de
Tue Jun 26 16:24:34 CEST 2012

Am 26.06.2012 16:10, schrieb Jared Mauch:

> I'm once again reminded of something I observed.  Make sure you
> disable ipv6 redirects on all interfaces.  This has significant
> performance penalty.  On 6500/sup720 this should be easy to do with
> interface range command.

Funky. Is this only the case with non-standard configurations like
multiple subnets on one interface?

There was also an interesting message on cisco-nsp recently about
tweaking ND timers when having a lot of direct neighbors.


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