On Tue, Apr 03, 2001 at 07:51:41PM -0400, RJ Atkinson wrote:
At 18:35 03/04/01, Jesper Skriver wrote:
Don't know how the world looks like in the US, but here a SDH/Sonet provider will never guarentee diversity of his/her circuit to that of a different provider,
Interesting, though they do guarantee that to NATO circuits.
The company I work for, can and do provide diverse circuits, but they won't guarentee diversity between that and one of a different provider, the reasoning behind this is, that one cannot know if/when the other provider reroute their circuit, so that there is no diversity any more.
smd, are you able to get diverse local paths over there ?
often the end user can be almost sure that at least the last few km will be in the same duct, as the local communities demand that the providers cooperation when digging fiber into the ground...
Obviously there is a concern if everyone is in the same duct, but if one builds with rings like sensible engineers,
SDH/Sonet protection removes quite a bit of the problem yes, but often it's usefull to get 2 circuits with diverse routing (and without protection) instead of a single with protection, and the price is usually in the same order for both. We always get multiple circuits with diverse routing instead of a single circuit with protection if we can. /Jesper -- Jesper Skriver, jesper(at)skriver(dot)dk - CCIE #5456 Work: Network manager @ AS3292 (Tele Danmark DataNetworks) Private: FreeBSD committer @ AS2109 (A much smaller network ;-) One Unix to rule them all, One Resolver to find them, One IP to bring them all and in the zone to bind them.