From: Lupi, Guy (Guy.Lupi@xxxxxxxxxxxxx)
Date: Fri Aug 16 2002 - 14:10:08 GMT-3
Actually, the links will be redundant and load balance, depending on how
your running your IGP/statics. If you are running eBGP, then the next hop
of the route will be rewritten with the loopback address of the neighbor
that announces it. If there is more than one route for the next hop (the
loopback in this case) the router will load share per packet or per
destination, depending on whether you are running CEF or fast switching.
This a very common setup for customers of ISPs that have 2 T1s to the same
provider router and want to load share accross them.
You could also do multilink ppp.
-----Original Message-----
From: CCIE [mailto:o_daramola@hotmail.com]
Sent: Friday, August 16, 2002 12:39 AM
To: Peng Zheng; ccielab@groupstudy.com
Subject: Re: EBGP Load Balance
ok I guess i didn't understand you. Bgp establishes its peer relationships
using tcp. You will need an existing igp (or static routes) to be able to
use the lo0 interface as the bgp peer. Once that is done, only one bgp route
will be injected into the routing table and your two links will be redundant
but not load balanced. The maximum-paths command allows bgp to inject two
equal cost routes into the routing table.
Yinka
----- Original Message -----
From: "Peng Zheng" <zpnist@yahoo.com>
To: "Hotmail" <o_daramola@hotmail.com>; <ccielab@groupstudy.com>
Sent: Friday, August 16, 2002 9:05 AM
Subject: Re: EBGP Load Balance
> I have no equipments to test. But I think R1 and R2
> must have the route to lo0 of other end.
>
>
> --- Hotmail <o_daramola@hotmail.com> wrote:
> > try maximum-paths 2
> >
> > Yinka
> > ----- Original Message -----
> > From: "Peng Zheng" <zpnist@yahoo.com>
> > To: <ccielab@groupstudy.com>
> > Sent: Thursday, August 15, 2002 9:47 AM
> > Subject: EBGP Load Balance
> >
> >
> > > Hi,
> > >
> > > I have this config.
> > >
> > > R1 in AS 100.
> > > R2 in AS 200.
> > >
> > > There are two serial links between them.
> > > One on 192.168.1.0/30
> > > One on 192.168.2.0/30
> > >
> > > I want to do load balance on these two links. R1
> > has
> > > Lo0 with 1.1.1.0/24. R2 has Lo0 with 2.2.2.0/24.
> > >
> > > I know I need to add ebgp-multi and update-source
> > > under BGP config.
> > >
> > > But I need to config the routes to let R1 and R2
> > know
> > > how to get each other.
> > >
> > > I found config with static route like:
> > >
> > > on R1:
> > >
> > > ip route 2.2.2.0 255.255.255.0 192.168.1.2
> > > ip route 2.2.2.0 255.255.255.0 192.168.2.2
> > >
> > >
> > > But for LAB, static routes are not allowed. How
> > can I
> > > implement this config without static route?
> > >
> > >
> > > Thank you for help.
> > >
> > > Best Wishes,
> > > Peng Zheng
> > >
> > >
> > >
> > >
> > >
> > >
> > >
This archive was generated by hypermail 2.1.4 : Sat Sep 07 2002 - 19:48:27 GMT-3