Description

This document is published to capture the limitation of ACX7k router where firewall filter for certain UDP ports doesn't work.



Solution

Filter match with predefined UDP Port value is not hitting and filter count is not reflecting.

Below are some known UDP ports for which filter count doesn't work, this is ASIC limitation. Currently,  ASIC tags these ports with the feature mentioned below against each ports.


- L2TP = 1701

- VxLAN = 4789

- GTP = 2152


Modification History

2025-07-03 : Article Created