Re: InterNAP?

["Stephen Sprunk" <ssprunk () cisco com>]

Thus spake "Spolidoro, Guilherme" <guilherme.spolidoro () unisys com>
> Since they don't own the backbone, their SLAs apply only to their
PNAPs,
> i.e. they cannot guarantee performance, packet loss, delay, outages,
etc
> over somebody else's backbone (e.g. Sprint, UUNet, AT&T, etc).

Nor can anyone who peers with the above; InterNAP theoretically has a
better chance of getting good service, since they're a paying customer.
That's how their business model goes, at least.

> Many large enterprises are leveraging on the Internet to deploy VPN
> connectivity between company sites as a replacement for Frame Relay
> or ATM PVCs. In such cases, it's very important to make sure that the
> service comes with the right SLAs.

SLAs are rarely worth the paper they're printed on.  If you do not
design your network/services/whatever around the *expectation* that your
carrier will fail, you're in for a rough ride.  What consolation is a
prorated refund when your circuit is down for 2+ days?

S

     |          |         Stephen Sprunk, K5SSS, CCIE #3723
    :|:        :|:        Network Design Consultant, GSOLE
   :|||:      :|||:       New office: RCDN2 in Richardson, TX
.:|||||||:..:|||||||:.    Email: ssprunk () cisco com