ASA Port failure

[Michael Bartholomæussen]

Hi everybody!

we experienced a port failure om a brand new 5525X. The port looked to be up/up but no layer 2 traffic was transmitted. The interface was configured as outside, and when we moved outside to gig0/3 everything worked. We reloaded the ASA box twice, no luck.

any ideas how to debug a failure like this?

regards, Michael

[rvarelac]

Hi Michael, 

You can clear the interface counters and attempt to pass traffic and check if the counters increment. 

clear interface gig0/x

Show interface gig0/x

If the conters do not increment might indicate a Hardware issue, if you have a valid Cisco contract feel free to open a ticket with Cisco TAC to replace the device. 

Hope it helps 

- Randy -

[Michael Bartholomæussen]

Hi Randy,

Thanks for the reply.

Is it safe to assume that if the interface counter does not increase, and the interface is UP/UP, it is a hardware failure? Isn’t there any command that would validate that the interface might be broken in some way?

[rvarelac · Accepted solution]

There is no a specif command to check if the interface might be faulty, you can check the physical indicators  such as the LED status ( green , amber , red , no light  and the cabling.)

This document might help you to troubleshoot if there is any error on the interface 

https://supportforums.cisco.com/document/47506/asa-oversubscription-interface-errors-troubleshooting

Otherwise the device needs to be replaced.

-Randy-