On Core-SW01, the ports are configured with LACP (mode active) for link aggregation. On Core-SW02, the ports are configured as independent trunks, not as part of an LACP group. Because of this mismatch, LACP cannot form the bundle, and the aggregated ports on SW01 will go into a suspended state.
* A. CRC errors suggest cabling or signal integrity issues, not config mismatch.
* B. Error disabled occurs when a violation (like BPDU guard or port security) disables the port, not LACP mismatch.
* C. Administratively down indicates a shutdown command, not the case here.
References (CompTIA Network+ N10-009):
* Domain: Network Troubleshooting - Port-channel/LACP configuration issues, interface states.