[c-nsp] IPv6: GLBP Address

Gert Doering gert at greenie.muc.de
Mon Aug 5 04:10:40 EDT 2013


Hi,

On Mon, Aug 05, 2013 at 09:06:44AM +0200, Friedemann Stoyan wrote:
> (config-if)#glbp 2 ipv6 FE80::1
> % Address FE80::1 in group 0 - interface Vlan1
> (config-if)#
> 
> Why? What kind of limitation causes this behavior?

"Developers with lack of exposure to real world networks"

And sorry, can't help you with your original question - never used glbp,
never tried to figure out why it's weird with IPv6 (from what I gather,
there's more weirdness, like "you can enable glbp for IPv4 *or* IPv6,
but not for both at the same time").

We use HSRPv2 for IPv6, or just plain anycast router addresses
("ipv6 address $prefix::ffff anycast" and then enter $prefix::ffff 
as default gateway on the hosts).  Anycast is slow to failover, will
not give you adequate master/slave behaviour, but it's there and works,
even on the oldest IPv6 capable IOS version...

gert
-- 
USENET is *not* the non-clickable part of WWW!
                                                           //www.muc.de/~gert/
Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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