This is a case of Load Sharing vs. Load Balancing; very important
difference!
And unfortunately , this is
out of your control ... based totally on BGP hop
counts.
On a related note - I would like to drop a question to the group:
Similar situation; i.e. - we have dual frac-DS3's to two ISP's and we are
using BGP for basic redundancy/load sharing. The question now is how would
we do bandwidth management in this situation?
has signed us up for providing guaranteed bandwidth,
thank-you-very-much>>.
Specifically - say we have 6 clients, and want to enforce bandwidth cap's on
their usage . The best we have
come up with is
1 add another layer of routers between our Pices and our border routers
... use HSRP groups to
traffic shape specific clients to specific "middle" routers by default.
These new "middle routers" would perform the rate-limiting and then forward
to the border routers. The border routers would receive only partial routes
and iBGP would route those accordingly, otherwise default to
send to default gateway.
2 get some third party - Packeteer and use this for the rate
limiting / flow control. Still use iBGP + HSRP groups for "ISP client"
routing and initial traffic shaping .
Any thoughts? Have we overlooked something; the "automagic command" that
makes this work cleaner? Some other product that is all-encompassing and
functions as a magic bullet for this ...
Thanks!
TJ
-----Original Message-----
From: MADMAN [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, April 03, 2002 10:08 AM
To: [EMAIL PROTECTED]
Subject: Re: BGP Load-Balancing with 2 providers...Possible?? [7:40242]
I'm assuming your getting full routes from each provider. You will
most likely get a rough load balance based on the randomness of the
sites your users are connecting to and your upstreams a roughly equal,
i.e. 90% of your routes are not learned via provider A. But your not
going to get a 50/50 per packet load balance between 2 differant
poviders nor would you want to.
Dave
Cisco Nuts wrote:
>
> Hello,
> Is it possible to load-balance BGP traffic with 2 service providers...I
know
> it is possible to load balance with 2 circuits to the same provider using
> ebgp-multihop and update-source and cef but with 2 circuits to 2 different
> providers??
> Thank you for your help.
>
> _________________________________________________________________
> Send and receive Hotmail on your mobile device: http://mobile.msn.com
--
David Madland
Sr. Network Engineer
CCIE# 2016
Qwest Communications Int. Inc.
[EMAIL PROTECTED]
612-664-3367
"Emotion should reflect reason not guide it"
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