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Synchronised Flashing

I've got 6 or so Catalyst switches that seem to have no apparent fault, yet i find it hard to believe that all active ports on this many 24/48 port switches running VLANs can flash in sync (inc Gbit cross connects) and there not be an issue??

Has anyone come across anything like this b 4? Last time i saw something like this it was a faulty NIC on a device, but this was on a much smaller network and only over 1 switch...

A quick traffic analyser showed a large number of broadcast messages (ARP) but im sure this could be expected over multiple VLANs??

Any ideas/thoughts would be appreciated...

Jp

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