%ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel1: Ethernet1/31 is down
%ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/31 is down (Link failure)
%ETHPORT-5-SPEED: Interface Ethernet1/31, operational speed changed to 10 Gbps
%ETHPORT-5-IF_DUPLEX: Interface Ethernet1/31, operational duplex mode changed to Full
%ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/31, operational Receive Flow Control state changed to off
%ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/31, operational Transmit Flow Control state changed to off
When i bounce back the port porchannel established and all working fine.
XX-XX-XX-XX# sh platform software ethpc event-history interface e1/31 | b debounce
51) Event IF_LINK_ST, len: 34, at 817082 usecs after Wed Sep 26 00:10:57 2018
Link down sent to 0xfe000000 - Failure, Reason: Link down debounce timer stopped and link is down
52) Event IF_LINK_ST, len: 34, at 786320 usecs after Wed Sep 26 00:10:57 2018
Link down sent to 0xfe000000 - Failure, Reason: Link down debounce timer started
Could you help me to find the route cacuse
