[c-nsp] Sprint & AT&T BGP multihoming

[Brian Wallingford]

They don't what?

On Wed, 11 Feb 2009, Aaron wrote:

:Sprint has a world wide network. They do not  by transit from anybody.
:
:Aaron
:
:On Wed, Feb 11, 2009 at 10:05, Stephen Kratzer <kratzers at ctinetworks.com>wrote:
:
:> Deleted the original post, so I'll reply to this leaf...
:>
:> ATT is fine. Make sure that Sprint, at that particular location, has
:> multiple
:> transit providers. We are multihomed at one location with Embarq and
:> Level3.
:> As it turns out, Embarq's sole transit provider at that location IS Level3
:> making the Embarq connection all but useless as far as diverse,
:> load-balanced
:> routing is concerned.
:>
:> Stephen Kratzer
:> Network Engineer
:> CTI Networks, Inc.
:>
:> On Wednesday 11 February 2009 08:58:30 Adam Greene wrote:
:> > Had a good experience multihoming to AT&T, including fixing an issue with
:> > balancing traffic between the two providers, which we solved through
:> > advertisement of community strings. The engineer I spoke with was
:> extremely
:> > knowledgable.
:> >
:> > This was already a few years ago, though ...
:> >
:> > ----- Original Message -----
:> > From: "ChrisSerafin" <chris at chrisserafin.com>
:> > To: <cisco-nsp at puck.nether.net>
:> > Sent: Tuesday, February 10, 2009 5:44 PM
:> > Subject: [c-nsp] Sprint & AT&T BGP multihoming
:> >
:> > >I am planning on multi-homing a client's Internet connection for
:> > >redundancy, and wanted to know if anyone is doing this with Sprint
:> and/or
:> > >AT&T and has any pointers or 'gotchas' they have run into.
:> > >
:> > > I'm still months out from doing this and will most likely want to KEEP
:> > > the existing subnets that they gave us (a /23 and /24), without the
:> need
:> > > for rebuilding a bunch or VPNs, re-IP'ing externally facing devices,
:> and
:> > > DNS changes for externally available web presence.
:> > >
:> > > Ideas? Comments? Concerns? Flames?
:> > >
:> > > Thanks,
:> > >
:> > > Chris Serafin
:> > > chris at chrisserafin.com
:>
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