I don't think that this will work, think perhaps GRE supports AppleTalk but not OSI. Have a similar problem myself but so far had no joy from Cisco. OSI is ancient and must be bridged, not heard of ANY tunneling which succeeds, anyone else done it?...
If you're fiddling with spanning tree, are you causing STP to re-compute? This could time out a telnet session, i.e. STP convergence will be 50 seconds by default, enough to time out a telnet sessions as the ports transitions from listening-learning...
Further clarification:I've spoken to Cisco about this. It looks like they advocate a seven hop limit where possible, so root bridge placement is critical, but also say that STP timers can be tuned to allow more switches per stack. My original desig...
A misunderstanding here I think. I have proposed 16 switches in the same STP domain but two separate clusters each having eight. I believe the clustering spec originally limited cluster stacks to 3 and then later on expanded it to eight (no more th...
Why 9? I've just run a stack of 16 past Cisco and they said it should be ok, I intend running it as two stacks of eight in terms of clustering so I'd have a cluster manager for each stack, however, in stacking terms, I'd have 16.