Finding the mac address on 4255 IPS appliance

[Colin Higgins]

I have a 4255 IPS appliance, and this device has 5 GE interfaces.

I am trying to find the mac addresses for all these interfaces. The "sho int" at the CLI doesn't show it, nor do they appear in IME.

Where can I see them?

[Naveen Kumar · Accepted solution]

when the sensor boot up, you can see the MAC address of interfaces.

[rhermes · Accepted solution]

The 5 GigE sensing interfaces do have have MAC addresses.

In Promiscious Mode, they do not transmit anything (except possibly a TCP reset, but it will spoof the MAC address on the reset).

In In-Line Mode the IPS sensor is transparant at Layer 2 and will pass Ethernet frames unaltered (unless a signature is set to drop or alter the frame, of course).

The Management Interface DOES have a MAC address.

- Bob