From: Dan (dp595@xxxxxxxxxxxxx)
Date: Sun Feb 11 2001 - 20:08:11 GMT-3
If you are multihomed to a single provider you can do "outbound"
load-balancing with "max-path" but "inbound" load balancing takes a bit more
configuration (especially when you don't have control of the provider AS)
Being that BGP uses very static metrics as opposed to EIGRP or even OSPF it
can be tricky to get it right. By using AS prepending/padding, altering of
local pref, and setting meds, the right balance can be somewhat obtained.
Some providers won't listen to your meds though, so beware and ask
questions.
Of course we don't have to worry about this in the lab.
Dan Pontrelli
----- Original Message -----
From: "David Ankers" <d.ankers@chello.nl>
To: "Ronnie Royston" <RonnieR@globaldatasys.com>;
"'Gopal@Netlanceconsulting'" <netlanceconsulting@yahoo.com>; "Devender
Singh" <devender.singh@cmc.cwo.net.au>; "Ccielab@Groupstudy. Com (E-mail)"
<ccielab@groupstudy.com>
Sent: Sunday, February 11, 2001 5:18 PM
Subject: Re: BGP load balanceing
> I can add one more but it's abit obscure... If both lines connect to the
same
> router you can use multi-link PPP to bundle the lines (virtual templates).
> This will also be far more efficent than using the loopbacks if you are
using
> lines with different speeds.
>
> The downside (and also with loopbacks of course) is that you can't be
> multihomed to a single providor and load balance, you can with max-paths.
>
> D.
>
> On Sunday 11 February 2001 20:55, Ronnie Royston wrote:
> > I know of 2 ways to achieve load balancing.
> >
> > 1. Gopal said it.
> >
> > 2. Using loopbacks as the source and destination (remember: eBGP
requires
> > ebgp multihop command) and defining static routes (or letting an IGP do
it)
> > to tell the router of multiple equal cost paths to reach the remote
> > loopback.
> >
> > -----Original Message-----
> > From: Gopal@Netlanceconsulting [mailto:netlanceconsulting@yahoo.com]
> > Sent: Saturday, February 10, 2001 5:58 PM
> > To: Devender Singh; Ccielab@Groupstudy. Com (E-mail)
> > Subject: Re: BGP load balanceing
> >
> >
> > max-path will work in ebgp if you have multiple peers in the same remote
> > AS. this works:
> > router bgp 1
> > neigh 1.1.1.1 remote-as 2
> > neighbor 2.2.2.2 remote-as 2
> > max-path 2
> >
> > this doesn't:
> > router bgp 1
> > neigh 1.1.1.1 remote-as 2
> > neighbor 2.2.2.2 remote-as 3
> > max-path 2
> >
> > Cheers,
> > gopal
> >
> > -----Original Message-----
> > From: Devender Singh <devender.singh@cmc.cwo.net.au>
> > To: Ccielab@Groupstudy. Com (E-mail) <ccielab@groupstudy.com>
> > Date: Tuesday, February 06, 2001 2:35 AM
> > Subject: BGP load balanceing
> >
> > >Group,
> > >
> > >I saw the sample configs eBGP load balancing. I tried it too. But still
> > > one thing is not clear. Since by default bgp has only single path.
Don't
> > > we
> >
> > also
> >
> > >need "maximum-path 2" or whatever here.
> > >
> > >
> > >
> > >Devender Singh
> > >BE(Hons), CCNP
> > >IP Solution Specialist
> > >
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