topic The 5 GigE sensing interfaces in Network Security

Finding the mac address on 4255 IPS appliance

Colin Higgins — Sun, 10 Mar 2019 13:10:10 GMT

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?

when the sensor boot up, you

Naveen Kumar — Thu, 27 Mar 2014 08:58:35 GMT

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

The 5 GigE sensing interfaces

rhermes — Wed, 02 Apr 2014 22:35:42 GMT

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