From: Lupi, Guy (Guy.Lupi@xxxxxxxxxxxxx)
Date: Fri Aug 16 2002 - 14:53:40 GMT-3
This is true, but I would imagine if they asked you to do this in the lab,
they would have to provide you with a way to accomplish it. Either they
would allow you to run an IGP, you would be allowed to use statics, or you
would be allowed to use multilink and peer using the directly connected
interface addresses.
-----Original Message-----
From: Peng Zheng [mailto:zpnist@yahoo.com]
Sent: Friday, August 16, 2002 1:45 PM
To: Lupi, Guy; 'CCIE'; ccielab@groupstudy.com
Subject: RE: EBGP Load Balance
But if the routeis rewritten with the loopback address
of the neighbor, how R1 and R2 can get each other.
Because static route is not allowed in LAB.
So, R1 has no idea how to get 2.2.2.0/24. Is IGP
required to run on the links between AS100 and AS200?
But Does it make sense to run IGP between ASs?
--- "Lupi, Guy" <Guy.Lupi@eurekaggn.com> wrote:
> 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
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
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