topic CoreXL and Loopback in General Topics

CoreXL and Loopback

Robert_Pierce — Mon, 02 Sep 2019 02:50:52 GMT

Hi There,

For lab test I should assign a Loopback interface into the only one CPU using CoreXL. I've created loopback interface loop00 and I have 4 CPU. I've enabled all 4 CPU using cpconfig and coreXL, but when i trying to assign CPU 3 to loopback interface I'm getting the error "Interface is invalid. Check that the interface loop00 is active physical interface". I've run the following CLI "fw ctl affinity -s -i loop00 CPU_ID 3". What's wrong I do or I can only assign CPU for a physical interface?

Re: CoreXL and Loopback

PhoneBoy — Mon, 02 Sep 2019 03:31:43 GMT

Pretty sure you cannot assign a core to a loopback interface, only physical ones.

Re: CoreXL and Loopback

Robert_Pierce — Tue, 03 Sep 2019 19:12:25 GMT

Logical you correct but I didn't find any clear documentation or line that it says only for physical interfaces. Maybe somebody can send me a link?

Re: CoreXL and Loopback

PhoneBoy — Tue, 03 Sep 2019 21:07:16 GMT

The error message pretty clearly says only active, physical interfaces are supported.
A loopback interface is NOT a physical interface.
The Secure Network Distributor only handles traffic entering network interface cards (NICs), as noted in the ATRG: https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk98737

It still begs the question: why you want to assign a core to a loopback interface?