We are using MX105 and MS 250.
had issue with firmware upgrade when upgrade from 16 x to 17 x or higher ver.
problem was HTTPS traffic got slow even with good bandwidth .
Please use Unique Client Identifier instead MAC addres as shown on screen shot.
you can find it in Security & SD-WAN --> Addressing&VLANs
![Kave_0-1680573912572.png Kave_0-1680573912572.png](https://community.meraki.com/t5/image/serverpage/image-id/29237iBF1D587F1661E9C3/image-size/medium?v=v2&px=400)
kav noroozi