From: McDermott, Ted (ted.mcdermott@xxxxxxxxxxxxxx)
Date: Fri Jun 21 2002 - 16:02:10 GMT-3
Has anyone out there ever had to hook up Cabletron SmartSwitches deployed as
workgroup switches to Cisco Catalyst 6509 core switches, one 100 Mbps uplink
to each core switch. Apparently, there are some spanning-tree compatibility
issues that arise. If so, I'd like to know if there are any reliable
workarounds, even if it means going with a single uplink.
Karl Solie's Practical Labs book states on p.144: "...802.1q uses MST. Cisco
overrides this, by default, with PVST. Because the BPDUs are handled
differently between Cisco and third-party switches, care should be taken
whenever integrating these domains that Spanning Tree and the default VLANs
are consistent in both switches. The entire Cisco VTP domain looks like a
single broadcast/spanning tree domain to the third-party switches."
If the uplinks are not trunked, which assumes that the workgroup can live
with a single VLAN, would that avoid the issue Solie mentions? Does anyone
have any experience with trying to trunk with 802.1q between a Cabletron and
a Cisco switch?
Thanks,
Ted
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