| Title: | DEChub/HUBwatch/PROBEwatch CONFERENCE |
| Notice: | Firmware -2, Doc -3, Power -4, HW kits -5, firm load -6&7 |
| Moderator: | NETCAD::COLELLA DT |
| Created: | Wed Nov 13 1991 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 4455 |
| Total number of notes: | 16761 |
We have been having an high number of DECbridge 90 (DEWGB) failures. There are two different types of problems. 1. A number of these bridges die due to internal components burning. So far we have lost 10 - 12. It is the same components in all of the bridges we have lost. Is there a known problem with these??? So far we have not received much response from anyone in the DEChub group although I'm not sure if we have reached the right person yet. Who can I contact regarding theses problems or is there another way to escalate this issue? 2. We have also been experiencing problems where the bridges will stop forwarding. Sometimes a reset will clear it, other times we have to swap the bridge. We have put an analyzer on the LAN to try to determine if there is something causing the bridge to stop forwarding but haven't come up with anything yet. We have also monitored the counters to try to predict when this will happen but we don't see anything unusual before it hangs. The Bridge Forwarding State LED comes on when this happens. When this does occur you cannot reach the bridge via Hubwatch or MOP. Any help, suggestions or experiences would be appreciated. John
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2494.1 | RDGENG::GREID | Hail,Hail,Hail and Kill! | Tue Jul 11 1995 09:20 | 12 | |
JOhn,
I sure hope you get an answer to this as I have replaced 6 DB90s
in the last week, and I'm still seeing variations on the not forwarding
problems. I have two Bridges at the moment that go into this state for
45 seconds and then carry on passing traffic again.
I also had two swap three backplanes, one of which went bad when
a power supply blew up and buggered the backplane, Bridge, DECagent and
two DECpreater 90c's.
Giles.
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| 2494.2 | DC/DC Converters? | NETCAD::ROUNDS | Wed Jul 12 1995 10:59 | 35 | |
From: DELNI::NPSS::BIGELOW "Michele A. Bigelow, NPS Program Mgr, 226-5168 11-Jul-1995 1355" 11-JUL-1995 13:58:31.80 To: DELNI::ROUNDS,NETCAD::GRAHAM CC: BIGELOW Subj: FYI ...DEWGB Nat, Rich, I've responded to John Mandeville relative to the hardware failures he has experienced with the DEWGB. These are likely dc/dc converter failures (wear out failures of the DELTA converter). NPS has recently received a number of calls of this type. The converter is being replaced with a new part, however the new converter is not currently available. ECO's have been written for the bridge and other products affected by this change. Will provide new revision as soon as the new part is introduced. I've asked Ken Rauhala to respond to John on the "no forwarding" problem. Michele From: NPSS::BIGELOW "Michele A. Bigelow, NPS Program Mgr, 226-5168 11-Jul-1995 1352" 11-JUL-1995 13:55:14.12 To: RAUHALA CC: JOHNSON,WONKKA,ANTON,BIGELOW Subj: DEWGB problem listed in notes file Ken, John Mandeville has posted note 2494 in the HUB_mgmt notes file reporting a no forwarding problem with the bridge. Would you please contact him for the specifics of this problem. John's DTN is 244-6545. His node is PCBUOA::MANDEVILLE. Thanks, Michele | |||||
| 2494.3 | Another "no forwarding" site | MAASUP::PORAMBO | Thu Sep 28 1995 11:08 | 8 | |
Just wanted to let you know we are also experiencing the "no
forwarding" condition. Intermittently the forwarding led comes on solid
and the bridge needs to be power failed. We have very few details at
this time.
Bob
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