alan@cunixc.columbia.edu (Alan Crosswell) (05/05/88)
Has anyone else seen the situation where a DEC Lanbridge 100's forwarding
database seems to get messed up? The symptom is that users on one side
of the bridge can initiate a telnet connection to a remote host (the bridge
learns the forwarding for both hosts) but the reverse fails (once the given
forwading entry has timed out). In other words, the bridge seems to
learn only from one side. The only things I have been able to correlate
this with so far is that the bridges that this happens to are running the
newer DEBET ROM version:
Bridge Characteristics as of 4-MAY-1988 19:26:08
Bridge PSYCH, Address 08-00-2B-08-53-B6
Bridge id (priority/address): 128/08-00-2B-08-53-B6
Bridge type (executing): DEBET
Firmware version (executing): 2.0
Forwarding entries - max volatile: 8059
Forwarding entries - max non-volatile: 117
Total data line entries: 2
Current highest line number: 2
Downline load request software flag: Disabled
Downline load file identification:
Downline load request hardware flag: Disabled
ROM Bridge type: DEBET
ROM firmware version: 2.0
Also, when I dump out the forwarding database from the ill bridge before
reinitializing it, the forwarding table has a lot of zero entries at
the end which do not normally appear there:
Known Forwarding Physical Entries as of 4-MAY-1988 19:11:43
Bridge PHYSICS, Address 08-00-2B-04-40-5A
Physical address Outbound Last Seen Destination Set by Auto-
Line On Line Delete
AA-00-04-00-BC-04 2 N/A NORMAL LEARNING YES
AA-00-04-00-BB-04 2 N/A NORMAL LEARNING YES
AA-00-04-00-BA-04 2 N/A NORMAL LEARNING YES
AA-00-04-00-B9-04 2 N/A NORMAL LEARNING YES
AA-00-04-00-B8-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-B7-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-B6-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-B2-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-B0-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-AF-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-AE-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-AD-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-AC-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-AB-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-A9-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-A7-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-A6-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-88-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-85-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-84-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-83-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-82-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-81-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-80-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-7F-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-6E-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-6D-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-6C-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-6B-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-66-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-50-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-4F-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-4E-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-4D-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-4C-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-4A-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-49-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-48-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-47-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-44-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-43-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-40-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-3E-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-3D-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-09-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-08-04 1 N/A NORMAL LEARNING YES
AA-00-04-00-06-04 1 N/A NORMAL LEARNING YES
AA-00-03-01-0D-EE 1 N/A NORMAL LEARNING YES
80-00-10-90-15-AA 1 N/A NORMAL LEARNING YES
80-00-10-90-15-79 1 N/A NORMAL LEARNING YES
80-00-10-90-14-DB 1 N/A NORMAL LEARNING YES
80-00-10-90-14-3F 1 N/A NORMAL LEARNING YES
80-00-10-90-11-C4 1 N/A NORMAL LEARNING YES
80-00-10-90-11-04 1 N/A NORMAL LEARNING YES
80-00-10-90-10-9C 1 N/A NORMAL LEARNING YES
80-00-10-90-10-6C 1 N/A NORMAL LEARNING YES
80-00-10-90-0F-BC 1 N/A NORMAL LEARNING YES
80-00-10-90-0F-75 1 N/A NORMAL LEARNING YES
80-00-10-90-0E-B7 1 N/A NORMAL LEARNING YES
80-00-10-90-0D-A7 1 N/A NORMAL LEARNING YES
80-00-10-90-0B-C1 1 N/A NORMAL LEARNING YES
80-00-10-90-09-37 1 N/A NORMAL LEARNING YES
08-00-89-E0-02-DA 1 N/A NORMAL LEARNING YES
08-00-89-CC-CC-CC 1 N/A NORMAL LEARNING YES
08-00-7C-00-02-C7 1 N/A NORMAL LEARNING YES
08-00-2B-22-00-00 NONE N/A NONE SELF NO
08-00-2B-08-BF-98 1 N/A NORMAL LEARNING YES
08-00-2B-07-06-24 1 N/A NORMAL LEARNING YES
08-00-2B-06-57-ED 1 N/A NORMAL LEARNING YES
08-00-2B-04-F8-D4 1 N/A NORMAL LEARNING YES
08-00-2B-04-51-CD 1 N/A NORMAL LEARNING YES
08-00-2B-04-40-5A NONE N/A NORMAL SELF NO
08-00-2B-02-9F-04 1 N/A NORMAL LEARNING YES
08-00-2B-02-68-23 1 N/A NORMAL LEARNING YES
08-00-2B-02-62-AE 1 N/A NORMAL LEARNING YES
08-00-2B-02-34-7B 1 N/A NORMAL LEARNING YES
08-00-2B-02-01-EA 1 N/A NORMAL LEARNING YES
08-00-2B-00-12-E2 1 N/A NORMAL LEARNING YES
08-00-20-01-AF-40 1 N/A NORMAL LEARNING YES
08-00-20-01-AE-74 1 N/A NORMAL LEARNING YES
08-00-20-01-7F-FA 1 N/A NORMAL LEARNING YES
08-00-20-01-76-89 1 N/A NORMAL LEARNING YES
08-00-20-01-67-54 1 N/A NORMAL LEARNING YES
00-00-00-00-00-00 NONE N/A NORMAL LEARNING YES
00-00-00-00-00-00 NONE N/A NORMAL LEARNING YES
00-00-00-00-00-00 NONE N/A NORMAL LEARNING YES
00-00-00-00-00-00 NONE N/A NORMAL LEARNING YES
00-00-00-00-00-00 NONE N/A NORMAL LEARNING YES
00-00-00-00-00-00 NONE N/A NORMAL LEARNING YES
00-00-00-00-00-00 NONE N/A NORMAL LEARNING YES
00-00-00-00-00-00 NONE N/A NORMAL LEARNING YES
00-00-00-00-00-00 NONE N/A NORMAL LEARNING YES
We have been having the usual number of network jams, etc. caused by
misconfigured IP broadcast addresses but that never seemed to cause
these kinds of problems with our older 1.0 LAN Bridges. It is only
our newer 2.0 bridges that seem to be losing their minds. Has anyone
else seen this or know if DEC has come out with some ECO for the 2.0
bridge?
/a