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Spanning-tree portfast and etherchannels

Hi all,

How should the "spanning-tree portfast" command be configured on an Port-Channel interface ?

Should it be configured

1) On the Port-Channel interface itself (only)

2) On every interface which is member of that etherchannel but not on the Port-Channel interface

3) On the Port-Channel interface and on every interface which is member of that etherchannel

When you configure "spanning-tree portfast" on the Port-Channel interface, that command is not replicated on the member ports.

I know that the switch only sends BPDUs to one interface of the etherchannel (the first one active) but don't know how the portfast works in this scenario.

Thanks !

Sam

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