I have a single 6500 with dual sup 720’s. I want to ether channel to a 4500 that has two Sup 6-E 10GE. Can I do an etherchannel across the active and standby supervisor at the same time? So I would connect port 1 in the active on the 6500 to port 1 in the active on the 4500 and configure those as etherchannel. Then configure port 2 on the standby on the 6500 to port 2 in the standby on the 4500 and configure that as etherchannel. Can I configure them all as a 4 port etherchannel or do I have to do two 2 ports and leave one of them in blocking mode?