Hi!
I have a really simple question.
Reading the documentation about PPPoE (https://help.mikrotik.com/docs/display/ROS/PPPoE), in the server section there is: Do not assign an IP address to the interface you will be receiving the PPPoE requests on.
Why? What would happen if the interface got an address set from /ip address?
Thank you!
Denis
Not sure, but possibly if you do that, it can’t tell the remote end (client) what the server end IP address is. This usually doesn’t matter, except perhaps if you want to ping the server from the client. (I don’t know that windows likes it much though)
There is a couple of places to setup the local address, it can be configured in the profile,
or per secret. It appears in these you can use address pools to supply the IP address as well as
giving it a fixed value, so plenty of options.
When running a PPPoE server having an IP address on the interface is unnecessary as the client IP traffic is encapsulated within the PPPoE packets.
You can add an IP address to the interface for specific use cases, two common ones are for management of radios in fixed-wireless access networks, and for being able to provide both hotspot and PPPoE connections over the same network.
IIRC the reason the documentation says you should not assign an IP address is that it may unintentionally provide access to the Mikrotik, unless suitable firewall rules are also added.