topic Re: ASA Hidden Interface in Network Security

ASA Hidden Interface

robert.horrigan — Mon, 11 Mar 2019 19:39:45 GMT

Hi,

My NMS is reporting that the below interface is Up/Down. I cannot find any reference to this interface in the CLI. It is not the mgmt or other gig interfaces. Does anyone have any idea what this hidden interface is? Appreciate any feed back.

DisplayName	AdminStatus	OperStatus	Type	Name	Mode
IF-asa5520/1 [Null0]	UP	UP	GENERIC	IF-asa5520/1	NORMAL
IF-asa5520/2 [0]	UP	DOWN	GENERIC	IF-asa5520/2	NORMAL
IF-asa5520/3 [outside]	UP	UP	ETHERNETCSMACD	IF-asa5520/3	NORMAL
IF-asa5520/4 [inside]	UP	UP	ETHERNETCSMACD	IF-asa5520/4	NORMAL

Re: ASA Hidden Interface

Jennifer Halim — Tue, 25 Jan 2011 14:56:04 GMT

It should be gig0/2

If you perform the output of "show int ip brief" on the ASA, you should be able to get a summary of the interface status.

Re: ASA Hidden Interface

robert.horrigan — Tue, 25 Jan 2011 15:17:34 GMT

No this is some hidden interface...

Re: ASA Hidden Interface

David White — Tue, 25 Jan 2011 16:06:57 GMT

Hi Robert,

We would need more information, like what version of ASA software is running, as well as the output of the SNMP walk of the interfaces combined with the "show interface detail" output. There are some internal interfaces that may be exposed, but we need more information from you in order to provide a better response.

Sincerely,

David.