[c-nsp] Re: [j-nsp] load balancing between multiple BGP links

[Alok]

Thanks folks for all your replies.

wonder who decided that the next commercially deployed link capacity after a
T1 should be a T3 and the next commercially deployed link after a E1 should
be an E3

:-)
----- Original Message ----- 
From: "Phillip Vandry" <vandry at TZoNE.ORG>
To: "Alok" <alokdube at hotpop.com>
Cc: "Guy Davies" <Guy.Davies at telindus.co.uk>; "Joe Shen"
<sj_hznm at yahoo.com.cn>; <juniper-nsp at puck.nether.net>;
<cisco-nsp at puck.nether.net>
Sent: Thursday, September 15, 2005 11:15 PM
Subject: Re: [c-nsp] Re: [j-nsp] load balancing between multiple BGP links


> On Wed, Sep 14, 2005 at 06:38:09PM +0530, Alok wrote:
> > R1===========R2
> >
> > EBGP multihop between them over 2 links
> > link 1 =10Mbps
> > link 2 = 20 Mbps
> >
> > total traffic = 25Mbps
> >
> > Is there a way to ensure that link 1 doesnt get choked?
>
> I have not tried this, but if you can somehow treat link 2 as two links
> and install two routes, then you can do equal cost load balancing
> over link 1, link 2, and link 2 again. Options for doing that are
> secondary IP addresses on each side of link 2 and a second static
> route pointing to the secondary address on the other side (if using
> static routes) or run link 2 as a trunk and put 2 vlans on it
> (if using OSPF instead of static routes).
>
> This solution is only practical when the greatest common divisor of
> the link sizes is large.
>
> -Phil
>