[c-nsp] Quick question on HSRP...

[Jeyamurali Sivapathasundaram]

When you move to ipv6 :)

Jey S.
Network Engineer
CCIE #41608

Sent from my iPhone

> On 2 Jan 2014, at 18:17, Blake Dunlap <ikiris at gmail.com> wrote:
>
> I'm still waiting for the day that HSRP can use pure L2 addresses to
> communicate and not burn 3 ips...
>
>
>> On Wed, Jan 1, 2014 at 5:38 AM, Gert Doering <gert at greenie.muc.de> wrote:
>>
>> Hi,
>>
>>> On Tue, Dec 31, 2013 at 07:54:10PM +0000, Phil Mayers wrote:
>>>> On 31/12/2013 19:40, Gert Doering wrote:
>>>>> 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.
>>
>> Having a different packet format for IPv6 makes sense, as, uh, it's not
>> IPv4 anyway :-) - but forcing me to move our IPv4 HSRP groups to v2 (which
>> incurs a reachability hit) to be able to enable *different* HSRP groups
>> for IPv6 later on is just so slightly annoying.
>>
>> [..]
>>> 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.
>>
>> True.  Plus programmers that have never worked with a real network,
>> where things actually *evolve* over time...
>>
>> [..]
>>> 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.
>>
>> True, that one was done by someone who never had to do a router setup
>> as well, I bet.
>>
>> 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
>>
>> _______________________________________________
>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/