[c-nsp] HSRP question

[Ivan Groenewald]

Changing the group number changes the virtual/standby MAC. Connecting
devices need to update their arp tables.

You could manually clear arp on all connected devices when you change the
group number to force a very quick update.

However, a bit more practical... I assume you are using the HSRP "standby
ip"/virtual address as gateway for other devices on your network. Depending
on your config, you could possibly point the connect devices to one of the
"router-pairs"'s real IP addresses for the HSRP vlan in question. After you
updated the HSRP group numbers you can point it back to the virtual IP
again.

hth
ivan

Tel: 0845 345 0919
Xtraordinary Hosting, 6 The Clocktower, South Gyle, Edinburgh, EH12 9LB
http://www.xtrahost.co.uk
-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Colm Fahy
Sent: 09 November 2004 11:30
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] HSRP question

For administrative reason I need to change the HSRP group numbers on a
router-pair in my network.

No interruption to service is acceptable.

anyone got an easy answer?

Kind regards
Colm Fahy
Friday Consulting
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