Load balancing

Walter Prue prue at usc.edu
Mon May 7 17:16:25 UTC 2007

Use the loopback address on each of the two routers as the bgp origination address and make sure that your router has
a route for the loopback address of the far router going over both of the GigE links.  Ciscos handle this fine.  Others can
as well. YMMV.


----- Original Message -----
From: dan <deearekay at gmail.com>
Date: Monday, May 7, 2007 10:09 am
Subject: Load balancing
To: nanog at merit.edu

> Hello,
> I currently have 2 routers with a single gigabit link (and 
> correspondinginternal BGP session) between them.
> router1 <---------gigabit------->router2
> Simple setup. Now that we have reached the limit on this gigabit 
> link, we
> are adding a second gigabit link between the same 2 routers, and we 
> wish to
> load balance across them. Traffic is about 5:1 ratio of out:in. 
> router2 has
> bgp sessions with several upstreams, and router 1 has bgp sessions 
> withfurther internal routers. What is the best way to balance 
> across these 2
> links?
> ---
> dan

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