200-series radio with PPPoE not getting IP from 4500 on 5.9.1

Any reason why a 200 series radio with pppoe enabled. Isn’t getting an IP when connecting to a 4500 AP?
AP has managment vlan enabled.

The other 300 series clients are working properly…

@aka

Hello @Tristan,

which IP on which interface? The radio itself connects to AP, right?
Could you PM me techsupport files from AP and SM? If possible, when the issue is in progress.

The CPE does connect. We use PPPoE auto assign on the cpe wireless interface, in NAT mode. It does not seem to even be attempting to get that authentication from our concentrator. Like that request is being blocked, or not even starting.

Our 300 series radios don’t seem to have an issue.

I’ll get files today. But see if you can lab this in general

AX - N backward compatibility is in alpha stage now and has to be enabled via CLI on each reboot.

https://community.cambiumnetworks.com/t/epmp45xx-backward-compatibility-with-n-gen-sms-alpha-trial/102438