PPPoE server on VLAN interface

RouterOS General
1

Diagram:

MT_Serv<----->MT_AP<---->Client_PC

MT Serv has the following config

ether1 10.100.0.1/24

MT_AP has the following config

Bridge1 (member ports: R52H,vlan1)
R52H
Ether1 10.100.0.2/24

Client PC has a static IP assigned (to verify vlan connectivity), 10.100.0.50/24.

I can ping all devices on vlan1. I then created a PPPoE server on vlan1. I see the packets coming in through the R52H interface on MT_AP, but they’re not making it to MT_Serv. It’s like the PPPoE packets are not passing through the VLAN.

Just to further confirm the VLAN was working properly I setup a DHCP server on the vlan1 interface. Setup my client PC to see if it would receive a lease, and it does.

I’m confident the VLAN is setup and working properly, however the PPPoE-Discovery packets are not making it to the PPPoE server…

The MTU is set to 1500 bytes on each of the VLAN interfaces, the physical ethernet ports also have a 1500Bytes MTU. The PPPoE server is configured with 1480/1480 for MTU/MRU.

Do I need to raise the MTU on the physical ethernet interface to make room for the VLAN / PPPoE overhead… or is there something else I haven’t done thats prohibiting the PPPoE discovery packets from being forwarded through the vlan?

Thanks,

Bill

2

scratch the MTU theory, can’t set a MTU of anything higher than 1500Bytes.. :slight_smile:

so why aren’t the packets being forwarded.. If DHCP is working that means broadcast packets are going through the VLAN.. Why not the broadcast PPPoE Discovery packets, which also go to a broadcast address (FF:FF:FF:FF:FF:FF)?

If I have layer1-4 connectivity, it seems PPPoE should be working!

Could it be that the VLAN and physical interface have the same MAC address? I’m grasping for answers at this point…

3

OK…

Just to rule out any problems with the wireless configuration.. I added ether3 to bridge1 (members: R52H, vlan1, ether3)..

The minute I did that I was able to create a PPPoE connection through the ethernet port… now to figure out why it wont work on the wireless..

4

Did you ever get to the bottom of this? I suspect it may be because you are bridging wireless without using WDS but can’t confirm as I don’t know how the clients are configured. Are the PPoE clients also the wireless clients or are they bridged through the wireless client?