Could anyone please explain what the following means and how did it happened? You assistance will be greatly appreciated. Thanks!
PCPM2924A#show post
FastEthernet0/14 failed front-end loopback test
FastEthernet0/17 failed front-end loopback test
FastEthernet0/18 failed front-end loopback test
FastEthernet0/19 failed front-end loopback test
FastEthernet0/20 failed front-end loopback test
PCPM2924A#