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RE: Using BGP to force inbound and outbound routing through particular routes

  • From: John Dupuy
  • Date: Wed Nov 02 16:36:19 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@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of
Hannigan, Martin
Sent: Wednesday, November 02, 2005 11:54 AM
To: Edward W. Ray; nanog@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@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of
> Edward W. Ray
> Sent: Wednesday, November 02, 2005 2:50 PM
> To: nanog@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@mmicman.com]
> Sent: Wednesday, November 02, 2005 11:44 AM
> To: 'nanog@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
>
>
>




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