| Title: | FDDI - The Next Generation |
| Moderator: | NETCAD::STEFANI |
| Created: | Thu Apr 27 1989 |
| Last Modified: | Thu Jun 05 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2259 |
| Total number of notes: | 8590 |
How long does it take for an FDDI ring heal (wrap) a ring upon
component failure.
How long does it take to heal a ring withing a DEChub 900 backplane.
I had a customer whom felt that time sensitive protocols could
loose sessions in a ring wrap transition time.
My impression is that the ring heals very quickly, but I do not know
the specific numbers. Is there a absolute maximum time or a calculation
that must be performed based on number of stations on the ring.
Thanks
Jim
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1519.1 | NETCAD::B_CRONIN | Fri Dec 02 1994 19:41 | 4 | ||
It takes under a second to wrap a ring, and be running again.
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| 1519.2 | Controling the wrap | ODIF11::LICATA | Tue Dec 06 1994 10:35 | 9 | |
That < 1 second sounds like a good rule of thumb.
Are there ways to more exactly determine and possibly
control the wrap speed.
What are the factors that determine wrap delay?
Jim
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| 1519.3 | NETCAD::B_CRONIN | Tue Dec 06 1994 15:50 | 9 | ||
The wrap time is not controllable.
It is bounded by the need for the PCM to determine that the neighbor
has gone away, then you need to scrub the ring, wrap, scrub again, and
then claim. I may be wrong about the second scrubbing, but you need to
scrub at least once.
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