I connect a 3550-12T and a 2950T-24 through 1000base-T port. Regarding to the CCO document, the crossover cable should be 1,2 to 3,6 and 4,5 to 7,8. I realised that it is still working fine if 4,5 and 7,8 is not crossed. The case is the same as b.yan's message that posted on Aug 14, 2002.
There is no error message at all if 4,5 and 7,8 are straightly connecting.
After I used the CCO recommended pin assignment(1,2 to 3,6 and 4,5 to 7,8), the 3550-12T have none error message but the 2950T logged an error message as follow:
%SCHED-3-STUCKMTMR: Sleep with expired managed timer ..........
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