On 31/12/2013 19:40, Gert Doering wrote:
Hi,
On Tue, Dec 31, 2013 at 03:59:18PM +0000, Phil Mayers wrote:
(Note that changing the HSRP version does not have this property; the
old vMAC will be removed from the FDB, and the box won't forward traffic
destined to it)
Could someone remind me why I have to change HSRP to v2 to be able to
Not sure about that - maybe some fixed-size field in the HSRPv1 packet?
Been a while since I looked at it in a sniffer.
do HSRP for IPv6, only to be then *not* able to run HSRP v4 and v6 in
the same group anyway?
Yeah, that's a bit odd. After all, you can have HSRP secondary IPs;
seems odd you couldn't tie the v4 & v6 together on one group.
I do recall HSRPv2 uses different MAC ranges for the IPv4 and IPv6 vMACs.
HSRP has a lot of weird edge cases on Cisco gear. IIRC a lot of them
relate to the size of the CPU MAC-address receive filter, and other
tedious crap that wouldn't matter if they moved off CPUs from last
millenium.
But it's what we've got :o(
In fairness to Cisco, other vendors have blind spots. Juniper makes you
type a truly tedious amount of config to get VRRP working, though at
least commit scripts can automate that out of existence.
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