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

[ChrisSerafin]

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