Re: HSRP load sharing with redundant circuits

From: Rick Burts (burts@xxxxxxxxxxxxxx)
Date: Thu Sep 13 2001 - 16:04:15 GMT-3


   
Anthony

I am not sure I fully understand your objectives but it sounds to me like
policy routing would provide what you need. You could define policy
routing (with its associated route-maps) so that certain traffic going
through the master would have the next-hop address set to be the slave
router which would receive the traffic and make a forwarding decision
which would send the traffic down the other link. You would need
something similar at the other end to ensure that responses were divided
over both links.

While you could do this, it would be somewhat complex and I dont know
that the results would be what you really want. There are several issues
to consider including: do you also need something similar if the backup
router takes over the HSRP lead; what will be the result if the Ethernet
remains up so the lead router is redirecting traffic to the backup but the
WAN link from the backup is down (would you be creating a loop ?); while
it will utilize bandwidth on both WAN links it will mean that some traffic
will cross the LAN twice (increasing load on the LAN to balance the WAN),
what criteria would you use in the route-map to identify traffic to be
re-directed ?

Rick

Rick Burts, CCSI CCIE 4615 burts@mentortech.com
Mentor Technologies 240-568-6500 ext 6652
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On Thu, 13 Sep 2001, McHie, Anthony wrote:

> Hey gang,
>
> Here is my question:
> How do you get an HSRP master to make use of the circuit on the HSRP standby
> router? The circuits are low bandwidth full-duplex. The desired state is
> to have both circuits utilized for both TX and RX. I'm open to route-maps,
> routing protocols, or any other means. Thanks
>
> Current State
> ------------------
> HSRP 10.3.0.3



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