| 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 |
Customer has standalone DB90FL using the thick and thin ports. The workgroup side consists of approx. 10 nodes running DECnet Phase IV with area routers in use on each side of DB90FL. The thick wire side is mostly IBM with IBM6611 RISC based systems that bridge/route to token ring. The IBM side currently has "issues" being worked. When the problem events happen on the IBM side the DB90FL appears to lock up (LED status unknown) and there is no DECnet reachability and Lat disconnects are seen. Customer has disabled Spanning Tree on the DB90FL assuming this problem was due to the number of bridges and the ongoing "issues" on the thickwire segment. This did not change the scenerio. Both LAN segments appear clean as far as send/receive type failures. With the DB90FL in Flood Mode the same problems are seen. What does a DB90FL do when Spanning Tree is disabled? Does it ignore all ST packets and forward normally or will it wait for ST to be stable before resuming forwarding? Customer states that in some cases he has had to stop/restart DECnet before reachability resumed. VMS 5.5 - 6.1, DB90FL 3.1 Please provide a pointer if there is a better place to ask...
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1343.1 | not often a good idea... | LEVERS::SLAWRENCE | Thu Aug 25 1994 09:37 | 6 | |
My memory is a bit fuzzy on this, but I believe that when Spanning Tree
is disabled the DECbridge 90 forwards all traffic _except_ spanning
tree multicasts. If this sounds dangerous to you, then you have
correctly analyzed the situation.
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