SAN Switch 9148 UPG procedure when using Port Channel

Hi,
I am kind of new to the UPG procedure of Cisco Switch, and the customer i am working with is using Port Channel.
Do i have to shutdown the port channel before executing the switch UPG or if everything can stay up? Will i lose connection when the UPG will proceed ?
If anyone has some documentation that describe the process, it would be much appreciated.
Thank you
Christian

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Well if it's the only remaining channel link, the port-channel goes down. If not the only remaining channel link, the port-channel continues without it. As you note, you lose bandwidth and I believe traffic will be rehashed across the remaining channel links, which can result in less optimal load distribution.
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SAN Switch 9148 UPG procedure when using Port Channel

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