IPv6 in the enterprise

[Matthew Huff]

When I used a GUA for my HSRP address, Windows 7 would get confused after a few days and lose its global address. Switching to a link-local address for HSRP appears to have resolved that, although we are still testing. We are running SXI5 on a 6509/sup720



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-----Original Message-----
From: Justin Krejci [mailto:jkrejci at usinternet.com] 
Sent: Monday, April 18, 2011 1:06 PM
To: Mark Kamichoff
Cc: Dale W. Carder; Matthew Huff; 'ipv6-ops at lists.cluenet.de'
Subject: Re: IPv6 in the enterprise



On Mon, 2011-04-18 at 12:02 -0400, Mark Kamichoff wrote:
> On Mon, Apr 18, 2011 at 10:39:56AM -0500, Dale W. Carder wrote:
> > We are using HSRP with static addressing (for link-local as well).
> > For the version of code that we are on, we couldn't use a global
> > address as the HSRP address, but this has not proved to be an issue.
> > In addition, it has had the nice side effect of being able to tell
> > everyone that the router is always fe80::1, regardless of what network
> > you are on.
> 
> We're doing the same exact thing with HSRP, and Cisco tells us that GUA
> addresses will be supported in the future.

According the documentation for 6509s the SXI4 release supports GUA for
HSRP. Previous to that you must use link-local for the virtual address.
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/product_bulletin_c25_603217_ps708_Products_Bulletin.html

A quick google search also yields 12.4T has support for HSRP GUA.
http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-fhrp.html#wp1062511