nanog mailing list archives
Re: Need provider suggestions - BGP transit over GRE tunnel
From: William Herrin <bill () herrin us>
Date: Fri, 28 Jan 2011 12:05:09 -0500
On Fri, Jan 28, 2011 at 11:10 AM, Robert Johnson <fasterfourier () gmail com> wrote:
My organization is planning to become multihomed in the near future. Currently we have redundant (router and physical path) links to a single AS where we get our transit, and speak BGP to them using a private ASN. This configuration has not been meeting our reliability requirements, so we will be getting our own ASN from ARIN, and moving from PA to PI IP space. Our new provider will be used for backup purposes only. We would like to minimize the monthly cost of this connection; to do this, we are planning to use a VZ business FIOS connection with symmetrical bandwidth to establish a GRE tunnel to a datacenter somewhere, and bring up a BGP session over that tunnel. I'd like to know if there are providers that offer such a service on a regular basis, and if so, if anyone is doing this and has words of wisdom.
Hi Robert, I use a similar technique myself and it works reasonably well. Servint.net was willing to do it for me and he.net gave me a quote as well. Three pitfalls to watch out for: 1. A small portion of your traffic is going to wander in via the data center link and down the GRE tunnel during normal operations. You can tweak the announcement so that it isn't much, but it won't be zero either. 2. Make sure you originate the network announcement from your physical location, not from the data center. In other words, no "network 10.2.3.0 mask 255.255.255.0" in the "router bgp" section at the data center. If the data center becomes disconnected from you, it should drop the announcement. 3. You'll need a small block (/29) of PA addresses at the data center to anchor the tunnel. Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside comĀ bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
Current thread:
- Need provider suggestions - BGP transit over GRE tunnel Robert Johnson (Jan 28)
- Re: Need provider suggestions - BGP transit over GRE tunnel Jack Carrozzo (Jan 28)
- Re: Need provider suggestions - BGP transit over GRE tunnel William Herrin (Jan 28)
- Message not available
- Re: Need provider suggestions - BGP transit over GRE tunnel Robert Johnson (Jan 28)
- Re: Need provider suggestions - BGP transit over GRE tunnel Franck Martin (Jan 29)
- Re: Need provider suggestions - BGP transit over GRE tunnel Valdis . Kletnieks (Jan 29)
- Re: Need provider suggestions - BGP transit over GRE tunnel C. Jon Larsen (Jan 29)
- Re: Need provider suggestions - BGP transit over GRE tunnel Robert Johnson (Jan 28)