From: Łukasz Bromirski (lbromirski@mr0vka.eu.org)
Date: Tue Oct 12 2004 - 07:46:48 GMT-3
Nico van Niekerk wrote:
>>In HSRP group You have one active forwarder, whereas in GLBP You can
>>have multiple ones. In HSRP You can of course make more than one group,
>>but this will require subnetting, which is not always feasible or
>>possible.
> Why do you need subnetting when using more than one group? Can't you assign
> 2 different addresses from the same network to 2 different standby groups?
Well, You can, but You have two different default gateways
configured for the subnet - which, if coupled with for example
not-that-quite proficient help desk people may effect in more errors,
confusion, or situations were during "problem solving" one virtual IP
will be choosen more often that the other, and this will break
load-balancing of traffic between gateways.
When You do separate subnet for each HSRP group, there's always one
default gateway (be it .1 for /24 subnets) - so, no confusion. Also,
planning of load balancing is somewhat easier - You usually do know how
many PCs will be there for a given subnet.
And that are just notes from real life. Technically, You can of course
do two HSRP groups in one subnet and provide two (or more) gateways from
it.
-- this space was intentionally left blank | #ukasz Bromirski you can insert your favourite quote here | lukasz:bromirski,net
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