The port-channels could be any of the following three types:
LLA port-channel. Configured on both systems with the same port-channel key and port number. The LLA port-channel key range is from 101 to 124. Only one LLA port per LLA port-channel is allowed. The range of LLA port-channels from 125 to 130 is reserved for internal usage. New LLA port-channels are allowed at run-time. However, changes to existing LLA ports and LLA port-channel is not supported.
ISL port-channel. Configured on both systems and member ports connecting the two switches. The ISL port-channel key is fixed as 100. When multiple VLANs are configured, ISL port-channel should be in trunk mode. The ISL port-channel must be a member of every VLAN that the LLA port-channels are in. Changes to the ISL port-channel will require SEFOS to be restarted after saving the configuration.
Regular port-channel. Any standard ports not configured as either LLA or ISL ports can be member of regular port-channels. Up to 12 regular port-channels can be created, with the port-channel keys ranging from 131 to 142.