Hi Jason. >>> PoS failure detection happens in under 50ms
IMHO this is the most important part, fast *down* detection. > It's not actually SONET all the way through. It's GigE from the router to > the SONET node, an unprotected OC192 wave to another node, out GigE to the > far end router. If the gear manages to shut down the GE lasers within the 50ms, you have no rights at all to complain :-) > I'm not necessarily talking about forwarding of packets here, I'm talking > simply about the time it takes the far side interface to come back up over a > SONET node; layer 1. Maybe this has nothing at all to do with SONET, I dunno > :) It was gleaned that the next step might be to look at the SONET node and > see if it's waiting 15 seconds to turn the laser back on or something. A 15 second wait before enabling the path is a good thing. Nothing worse than switch back to a path and experience a second down event (and thrid, forth etc.). If it's been up 15 secs, it probably is safe to use. -- Pelle RFC1925, truth 11: Every old idea will be proposed again with a different name and a different presentation, regardless of whether it works.
