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