[c-nsp] IPV6 in general was Re: Large networks

[Michael K. Smith - Adhost]

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of Grzegorz Janoszka
> Sent: Thursday, August 27, 2009 12:48 AM
> To: Daniel Verlouw
> Cc: Gert Doering; cisco_nsp
> Subject: Re: [c-nsp] IPV6 in general was Re: Large networks
> 
> Daniel Verlouw wrote:
> > No real experience with HSRP though, can anyone shed some light on
> that?
> > I understand it only works for link-local addresses?
> 
> Yes, unfortunately it is only link-local. I am just trying to figure
it
> out how to marry link-local with our global ipv6 assignments.
> 

I have GSR's that don't (and probably will never) support v6-HSRP/VRRP
or weighted RA's so I kludged it by anycasting the gateway address from
my two core routers.  It's not pretty, but it does work, albeit it takes
about 20 seconds to fail over.

interface GigabitEthernet0/0.9
 encapsulation dot1Q 9
 ip address <v4 address>
 no ip redirects
 no ip directed-broadcast
 ipv6 address <v6 address>::1/64 anycast
 ipv6 address <v6 address>::2/64
 ipv6 enable
 ipv6 nd ra-interval 3
 ipv6 nd ra-lifetime 5
 ipv6 nd suppress-ra

Regards,

Mike