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STP Extend System-id Question
I have a network with a 3550 switch at the core and 3 x 2900 XL switches as edge switches. The 3550 is running IOS: 12.1(8) EA1c The 2900 XLs are running Enterprise software: IOS: 12.0(5)WC7 The 3550 therefore supports the STP extended system ID and the 2900's do not. There are redunant links...
