Context Group and subinterfaces

[mahesh18]

Hi Everyone,

ASA  have two context groups say admin and and x.

Its interface gi0/2  has 6 subinterfaces  from 1 to 6.

3 subinterfaces ----0/2.1 to 3 are in admin and last 3 are in context x.

when i went to system context  it does not show where interface gi0/2 belongs to it only shows up up.

how can i find which context group physical interface gi0/2 belongs?

Thanks

Mahesh

[Jouni Forss · Accepted solution]

Hi Mahesh,

As you said, the interface GigabitEthernet0/2 is divided into subinterfaces. This means its a Trunk interface. The ASA has a Trunk with some other device connected to it.

So the physical interface (Trunk) itself doesnt belong to any context. Its subinterfaces however belong to the contexts as you mentioned.

- Jouni

[mahesh18]

Hi Jouni,

Is there any way i can check in running config that will show its trunk interface?

thanks

Mahesh

[Jouni Forss · Accepted solution]

Hi,

If a physical interface has subinterfaces then its considered a Trunk interface

For example

interface GigabitEthernet0/1

interface GigabitEthernet0/1.100

description LAN

vlan 100

I guess in the System Contex you should see same type of configurations for the GigabitEthernet0/2 interface and subinterface configurations?

- Jouni

[mahesh18]

Hi Jouni,

Many thanks again i got  it now.

Mahesh