Hello Atul sir,
Please explain why port-channel suspended one of the port
Hi Parvinder,
As you know, Etherchannel is a link-bundling technology and the port-channel is used to represent a group of interface bundled together. There are some perquisites to bundle switchport together which are as following 
=> Speed must match
=> Duplex must match
=> Must be access ports or trunk ports [combination of trunk and access port is not allowed]
F0/9 switchport will be suspended because of having incompatible with other switchports. Please verify the parameters.
Hope it helps ! keep learning !