I believe there is a mis-configuration somewhere on the interface in port-channel 2. When that happens, a secondary aggregator port is created.
A secondary aggregator port will be created in the LACP process when the ports you are
bundling are not compatible with each other, or with their remote peers. The secondary
aggregator port will have the ports which are compatible with others.
Configure all LAN ports in an EtherChannel to operate at the same speed and in the same
duplex mode. LACP does not support half-duplex. Half-duplex ports in an LACP EtherChannel
are put in the suspended state.
If you configure an EtherChannel from trunking LAN ports, verify that the trunking mode is
the same on all the trunks. LAN ports in an EtherChannel with different trunk modes can
LAN ports with different STP port path costs can form an EtherChannel as long they are
compatibly configured with each other. If you set different STP port path costs, the LAN
ports are not incompatible for the formation of an EtherChannel
I would suggest you to schedule a down time and take down the port-channel, put the configurations to default, shut the interfaces and recreate both sides and make sure the configuration is the same in both sides.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...