Manually Configured Channel Groups - Cisco MDS 9000 Series Configuration Manual

Configuring PortChannels
• If autocreation of channel groups is enabled for an interface, you must first disable autocreation before
Tip
When enabling autocreation in any switch in the Cisco MDS 9000 Series Multilayer Switches, we recommend
that you retain at least one interconnected port between the switches without any autocreation configuration.
If all ports between two switches are configured with the autocreation feature at the same time, you may face
a possible traffic disruption between these two switches as the ports are automatically disabled and reenabled
when ports are added to an autocreated PortChannel.

Manually Configured Channel Groups

A user-configured channel group cannot be converted to an autocreated channel group. However, you can
convert an autocreated channel group to a manual channel group. Once performed, this task is irreversible.
The channel group number does not change, but the member ports operate according to the properties of the
manually configured channel group, and the autocreation of channel group is implicitly disabled for all member
ports.
Tip If you enable persistence, be sure to enable it at both ends of the PortChannel.
downgrading to earlier software versions or before configuring the interface in a manually configured
channel group.
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
Manually Configured Channel Groups
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