You need a minimum of 2 routers (naturally) in order to practice some BGP.
With 2 routers (back-to-back), you can configure EBGP or IBGP, you'll only
have 1 neighbor/peer, but it's enough to let you practice the fundamentals.
You can create your BGP neighbor, turn on "debug ip bgp events", and watch
the neighbors get established. You can even turn on "debug ip tcp packet"
and see the TCP 3-way handshake take place when forming the peering
relationship.
Once the connection is "established", you can configure 5 or 10 loopback
interfaces on each router, assign seperate networks to each interface, then
advertise them in BGP. A "show ip bgp" should produce those networks in the
BGP table. Further, a "show ip bgp neighbor x.x.x.x advertised-routes" will
show you the routes you are advertising to your BGP peers.
You are somewhat limited in what you can play with when you only have 2
routers, so 3 routers would be even better if at all possible (the more the
merrier), this would allow you to play with route reflectors,
confederations, etc. But 2 routers should suffice to get a majority of the
BGP basics under your belt.
-Chuck
----- Original Message -----
From: "Sam LI" <[EMAIL PROTECTED]>
To: "Charles Ryan" <[EMAIL PROTECTED]>; "Fanglo P.M. MA"
<[EMAIL PROTECTED]>
Cc: "Cisco List" <[EMAIL PROTECTED]>
Sent: Tuesday, October 24, 2000 9:42 PM
Subject: Re: BGP home lab
> are you sure that 2 routers is enough for this,
> It is my experience that i need 4 routers at least
>
> Sam Li
> ----- Original Message -----
> From: Charles Ryan <[EMAIL PROTECTED]>
> To: Fanglo P.M. MA <[EMAIL PROTECTED]>
> Cc: Cisco List <[EMAIL PROTECTED]>
> Sent: Wednesday, October 25, 2000 5:01 AM
> Subject: Re: BGP home lab
>
>
> > You can practice your BGP with as little as 2 2501 routers connected
> > back-to-back. Seeing how your home lab setup will not be (at least it
> > shouldn't be) connected to the internet, feel free to inject as many
> routes
> > as you wish while you are practicing.
> >
> > -Chuck
> >
> > ----- Original Message -----
> > From: "Fanglo P.M. MA" <[EMAIL PROTECTED]>
> > Newsgroups: groupstudy.cisco
> > To: <[EMAIL PROTECTED]>
> > Sent: Tuesday, October 24, 2000 12:59 AM
> > Subject: BGP home lab
> >
> >
> > > Does anyone know how to setup BGP home lab? Does there any free real
BGP
> > > route can be injected to home lab envirnoment?
> > >
> > > Best regards,
> > > Fanglo
> > >
> > >
> > > _________________________________
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