From: Sumeet Gohri (sgohri@xxxxxxxxxx)
Date: Thu Sep 13 2001 - 23:08:19 GMT-3
Anthony/Rick
My suggestion is to use two instances of HSRP(with each router being primary
and a backup simultaneously) and use either manual traffic load balancing
using the route-maps or inserting two static default routes in the devices
behind the routers. As far as the routing loop senario discussed by
Anthony...I will suggest that you track the interfaces (WAN or LAN) so that
when the WAN interface connected to a router goes down then the router gets
demoted to backup and traffic passes through the other router.
Sumeet
CCNP, Alteon Certified Administrator
CNE 3x,4x,5x...MCSE and CCIE wannabe :)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Rick Burts
Sent: Thursday, September 13, 2001 3:04 PM
To: McHie, Anthony
Cc: ccielab@groupstudy.com
Subject: Re: HSRP load sharing with redundant circuits
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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