Thank you Andrew for the response.
We haven't upgraded the software on the SRW208P switches as they have been shipping with the latest firmware, 1.0.4. As a precaution, I grabbed the current image off Cisco and uploaded it to the switch. The switch shows the same version and create date as indicated in my original post, so this confirms the Software version we are running is the latest code.
We are running the following versions on the SRW248G4P switch.
Boot Version: 1.0.1
Software Version: 1.0.2
Loader Version: 1.0.1
Hardware Version: R01
I know there's a newer 1.3.1.0 software version out there. Since the problem seems to follow the "new" SRW208P switches I am dubious about a 248G4P upgrade. We will probably do the upgrade eventually.
I'm attaching the config files for the SRW208P and SRW248G4P switches. If you want to load these, the 48-port config requires that you enter the switch's base mac in two places near the top of the text file (replace "put-MAC-here" with hardware MAC address of target switch using xx-xx-xx-xx-xx format). The RSTP priority in this config has been modified to 12288, which works fine with the 208P default STP settings.
The 208P configuration is the factory default with these modifications: IP address, mask, and gateway, and the Spanning Tree type and priority are RSTP 16384.
If you want to see the failure, you will need to set the priority on both switches to the same value, so, for example, 16384. I did an experiment this morning where I set them both to 16384, then changed the 248G4P RSTP priority to 12288. I then was able to access the 208P Web portal log--there was only one entry regarding spanning tree:
3 2147483643 01-Jan-2000 01:55:23 Warning %STP-W-PORTSTATUS: g2: STP status Forwarding
These are the log messages from the 248G4P (fa3 on the 248G4P switch connects to g2 on the 208p):
-------------------------
11:8:18 2010-5-11
Log Messages:
Level :6, Module:5, functions:1, error number:1
Information:Unit 1, Port 3 link-up notification.
-------------------------
11:7:21 2010-5-11
Log Messages:
Level :6, Module:5, functions:1, error number:1
Information:Unit 1, Port 3 link-down notification.
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10:54:58 2010-5-11
Log Messages:
Level :6, Module:5, functions:1, error number:1
Information:Unit 1, Port 3 link-up notification.
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10:54:1 2010-5-11
Log Messages:
Level :6, Module:5, functions:1, error number:1
Information:Unit 1, Port 3 link-down notification.
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10:36:55 2010-5-11
Log Messages:
Level :6, Module:5, functions:1, error number:1
Information:STA topology change notification.
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10:36:55 2010-5-11
Log Messages:
Level :6, Module:5, functions:1, error number:1
Information:Unit 1, Port 3 link-up notification.
-------------------------
10:30:45 2010-5-11
Log Messages:
Level :6, Module:5, functions:1, error number:1
Information:Unit 1, Port 3 link-down notification.
-------------------------
10:1:13 2010-5-11
Log Messages:
Level :6, Module:5, functions:1, error number:1
Information:STA topology change notification.
-------------------------
10:0:37 2010-5-11
Log Messages:
Level :6, Module:5, functions:1, error number:1
Information:STA topology change notification.
FYI, to cover all bases, we have opened an RMA on 3 of the switches exhibiting this behavior. I will update this post when we test the replacements.
Best regards and thanks,
Lea Anne Morrell
