CPU Load Issue in pfSense 2.7.0 [intr{swi1: netisr x}]

[esaenz]

Hello, I hope you are doing well. Thank you for taking the time to look into the issue.

Let me begin by explaining the situation.
I have multiple routers with pfSense configured as follows:

pfSense 2.5.1
FreeRadius
Captive Portal
MAC Authentication
Separate networks using VLANs

6 Intel EM Interfaces

Intel(R) Core(TM) i7-3520M CPU @ 2.90GHz
4 CPUs: 1 package(s) x 2 core(s) x 2 hardware threads
8GB RAM
128GB SSD

Handling traffic ranging from 600Mbps to 700Mbps during peak hours.

The problem is as follows:

All routers show the following resource consumption:

0% interruptions, even when handling 900Mbps traffic, it maintains that percentage.

We updated with a clean installation of version 2.7.0 and configured it like the other routers.

The issue is that as soon as the traffic exceeds 600Mbps, interruptions start occurring, reaching up to 17%.

This is without having the captive portal active. When activated, interruptions increase up to 60%.

Has anyone encountered the same issue and found a solution? Or even if you haven't encountered it, any help in understanding how to resolve it would be appreciated.