Using BGP to force inbound and outbound routing through particular routes

Wed Nov 2 21:35:07 UTC 2005

There is nothing about a cable modem that would normally prevent a 
BGP session. Nor do all the intermediate routers need to support BGP 
(multi-hop BGP). However, direct connections are preferred.

Your _real_ challenge is convincing Roadrunner's NOC staff to program 
one of their backbone routers to do a BGP session with a cable modem 
sub. Or, for that matter, getting them to even route a non-roadrunner 
IP block to a cable modem sub.

Instead you might try borrowing a bunch of old 2500s and setting up a 
test lab that isn't connected to actual net.

Best of luck on your CCIE.

John

At 02:06 PM 11/2/2005, Edward W. Ray wrote:

>66.6.208.1/24, ASN is currently 11509 but I will be getting my own shortly.
>
>Edward W. Ray
>
>-----Original Message-----
>From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu] On Behalf Of
>Hannigan, Martin
>Sent: Wednesday, November 02, 2005 11:54 AM
>To: Edward W. Ray; nanog at merit.edu
>Subject: RE: Using BGP to force inbound and outbound routing through
>particular routes
>
>
>
>
>What's the netblock and ASN you already have?
>
> > -----Original Message-----
> > From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu]On Behalf Of
> > Edward W. Ray
> > Sent: Wednesday, November 02, 2005 2:50 PM
> > To: nanog at merit.edu
> > Subject: Using BGP to force inbound and outbound routing through
> > particular routes
> >
> >
> >
> >  spam was a lousy name...
> >
> > -----Original Message-----
> > From: spam [mailto:spamjail at mmicman.com]
> > Sent: Wednesday, November 02, 2005 11:44 AM
> > To: 'nanog at merit.edu'
> > Subject: FW: Using BGP to force inbound and outbound routing through
> > particular routes
> >
> > I recently made a request to get a cable modem connection at my home.
> > I went for one of those $29.95 for three month specials in case I run
> > afoul of some rules prohibiting what I am going to do.  I already have
> > a multi-T1 connection with a Class C block and BGP running on my Cisco
> > 3640 router, and was looking to become multi-homed.  The cable
> > connection is via bridge/DHCP cable modem, and was going to hook it up
> > to the Cisco 3640.
> > I have already
> > done the research and know from what block of IP addresses I will be
> > assigned, and the BGP route tables/peers.
> >
> > I would like to use BGP to force inbound and outbound routing only
> > through particular peers, Sprint (AS 1239) and UUNET (AS 701).  I have
> > been reading "Practical BGP" by Whate, McPherson and Sangli and this
> > appears to be possible.  However, do my adjacent routers need to
> > support BGP in order for this to work?  Could I use other routing
> > protocols to accomplish this, or would this require knowledge of all
> > possible downstream router IP addresses?
> >
> > Edward W. Ray
> >
> >
> >