PPPoe recieved PADO with unknown host-uniq dropping

RouterOS General
1

Hi,

We have deployed a few 450g mikrotiks into the field and are running into a very wierd issue with pppoe.

the error message is:

18:46:22 pppoe,ppp,debug,packet vdsl: sent PAP AuthReq id=0x52
18:46:22 pppoe,ppp,debug,packet <user xxxx@xxxx>
18:46:22 pppoe,ppp,debug,packet
18:46:23 pppoe,debug,packet ether2-vdsl: sent PADI to FF:FF:FF:FF:FF:FF
18:46:23 pppoe,debug,packet session-id=0x0000
18:46:23 pppoe,debug,packet host-uniq=0x9ae
18:46:23 pppoe,debug,packet service-name=
18:46:23 pppoe,debug,packet ether2-vdsl: rcvd PADO from 00:08:E2:56:C0:1A
18:46:23 pppoe,debug,packet session-id=0x0000
18:46:23 pppoe,debug,packet host-uniq=0x9ae
18:46:23 pppoe,debug,packet service-name=
18:46:23 pppoe,debug,packet ac-name=nme-sot-dry-lac1
18:46:23 pppoe,debug,packet ac-cookie=47 58 90 14 3f b8 97 6a 7a 06 12 4d e3 6c 22 f1
18:46:23 pppoe,debug,packet ether2-vdsl: rcvd PADO from 00:17:94:4E:C2:1A
18:46:23 pppoe,debug,packet session-id=0x0000
18:46:23 pppoe,debug,packet host-uniq=0x9ae
18:46:23 pppoe,debug,packet service-name=
18:46:23 pppoe,debug,packet ac-name=nme-sot-dry-lac2
18:46:23 pppoe,debug,packet ac-cookie=6a e5 b4 e3 da 18 f2 87 9d 27 0f 66 c4 3b a3 94
18:46:23 pppoe,debug ether2-vdsl: received PADO with unknown host-uniq, dropping
18:46:23 pppoe,ppp,debug,packet vdsl: rcvd LCP TermReq id=0x3
18:46:23 pppoe,ppp,debug vdsl: LCP closed
18:46:23 pppoe,ppp,debug,packet vdsl: sent LCP TermAck id=0x3
18:46:23 pppoe,ppp,debug vdsl: LCP lowerdown
18:46:23 pppoe,ppp,info vdsl: terminating…
18:46:23 pppoe,debug,packet ether2-vdsl: sent PADT to 00:00:00:00:00:00
18:46:23 pppoe,debug,packet session-id=0x576c
18:46:23 pppoe,ppp,debug vdsl: LCP lowerdown
18:46:23 pppoe,ppp,debug vdsl: LCP down event in starting state
18:46:23 pppoe,ppp,info vdsl: disconnected
18:46:23 pppoe,debug,packet ether2-vdsl: rcvd PADT from 00:08:E2:56:C0:1A
18:46:23 pppoe,debug,packet session-id=0x576c
18:46:23 pppoe,debug,packet ether2-vdsl: rcvd PADT from 00:08:E2:56:C0:1A
18:46:23 pppoe,debug,packet session-id=0x576c


This just repeats

This service goes back to a carriers LAC which authenticates against our LNS. We dont see any traffic from the LAC for the mikrotiks (but ciscos work fine).

When we connect the same pppoe profile against a bba-group terminated on the LNS with the same virtual template it all works fine.

The router is currently running on 5.0rc3 was originally on rc1.

Has anyone experienced anything similar?
I have tried basically every iteration and option that mikrotik has (in regards to pppoe) to no avail.

Sincerely,

2

Actually is there anyway to just disable the function that is causing this issue?

It must be a checking function, "received PADO with unknown host-uniq, dropping "

3

Hello?

4

Alright, for anyone else who gets this issue:

Basically the routeros system looks to have an issue with any pppoe system terminated against a LAC, and when the session is forwarded to the LNS for authentication the router os sees the new host uniq for the LNS and drops the session.

This appears to be an issue with the router os implementation of PPPoe, I have read another few forum posts which confirm a similar situation.

I cannot debug this any further, firmware changes from old to new dont make a difference and it is definitely not a hardware fault (happening on multiple different devices). We have for the time being made the pppoe session terminate against a linksys router which works fine.

5

We are coming across the exact same issue, does anyone know a work around?

Surely this must be affecting all ISPs in the UK who use BT?

6

HI

Did anyone get to the bottom of this. We are seeing this on a few of devices (RB750). We have updated the sofftware to the latest but it does not help.

Thanks

7

HI,

I was just checking to see if anyone solved this issue?

We are seeing the exact same issue.

Thanks

8

I have tried using ROS6.0 RC3 and still the same issue as described.

Can anyone please assist ?

9

Everyone in this message thread should send a message to support@mikrotik.com so they know it is a serious problem.

10

I have provided packet traces for this to Mikrotik and been awaiting a response for 10 days now. Hopefully this means they have confirmed an issue…

Mikrotik - any news on Ticket#2013042666000109 please ?

11

Bump ?

Oh, and we tried a different brand router as a test and it connects fine so the issue seems to be unique to the Mikrotik PPPoE client.

12

Bump ?

It is now the end of June and still no response from Mikrotik Support ? Any ideas are welcome please ?

13

I have this same issue. I’m using Draytek Vigor 120’s in half bridge mode, but it’s a lot of mucking around with MTU settings to make that work. I’d much rather use the Mikrotik as a PPPoE client.

14

Apologies for resurecting a 10 year post but facing the same issues with Draytek Vigor 166 in bridge mode and PlusNet’s VDSL. I’m using RB5009UG+S+ with ROS 7.16.1. and my PPPOE drops every 6 minutes:

VDSL: received PADO with unknown host-uniq, dropping

Has anyone managed to get PPPOE running successfully with VDSL/FTTC?