2 EtherChannels on same switch can be established ?

[sun816]

1/I bind 2 FEs ports of vlan 2 into Po1 t and other 2 FEs ports of vlan 3 into

Po2 on the same switch.After I connect them with 2 crossover links.

I have foresee that one port of Po1 and Po2 will be blocked because of

Configuration BPDU negotiation but show spanning-tree output display the two Port channel interface in fwding state.Who can tell me the reason?

[donewald]

Since you've placed these Etherchannels in only one vlan, by connecting these both to the neighboring switches there is no loop and therefore no blocked ports. If you were to allow these Etherchannels to trunk all VLANs you would see one of them in blocking mode.

Hope this helps you,

Don