PPPoE and the Zen network in the UK.

Hello,
I have a client took a RB2011 to the UK from Canada and wants configure it there.
Could anyone share insight in the configuration on their ADSL connection.

Firmware 6.30.2

MTU 1492?
Anything else interesting that I should know?


Rudy
Kern’s Multimedia & Design

Sent from my iPad using Tapatalk HD

Should be fairly straightforward, eg:

https://support.zen.co.uk/kb/Knowledgebase/Creating-a-PPPoE-connection-using-the-Draytek-Vigor-2900-router-and-Voyager-205

If you’re lucky, you won’t be restricted to an MTU of 1492:

http://forum.mikrotik.com/t/pppoe-connection-to-uk-bt-adsl-mtu-with-rfc-4638/91773/1

I’m a Zen customer and for a short while I was running a RB951G as a PPPoE client to a Zyxel P660R acting as a ADSL2+ modem. This allowed me to jump on the IPv6 trial Zen are running at the moment, the Zyxel is too old for IPv6.


It did work well but I couldn’t get MTU > 1492 and I found speed tests dropped by about 15%; I suspect there was some packet fragmentation going on. However this was before RouterOS added support for MTU > 1492 for PPPoE.


I’ve now replaced my internet front end with a Cisco V/ADSL router so I’ve nuked the config on the 951 but I have got a copy of the config.

The most pertinent part of the config was-

/ppp profile
add change-tcp-mss=yes name="Zen Profile" use-compression=no use-encryption=no use-mpls=no
/interface pppoe-client
add add-default-route=yes disabled=no interface=ether5-ADSL max-mru=1492 max-mtu=1492 mrru=1600 name="Zen PPPoE" password=***** profile="Zen Profile" user=zen*****@zen
/queue type

The Zyxel modem was connected to ether5-ADSL.

I put inbound firewall rules on the in-interface “Zen PPPoE” and added an allow rule for established and related traffic on in-interface=ether5-ADSL

The configuration appeared to work correctly, although after 3 days the performance and speed has deteriorated.
When replaced with the original hardware, the speed resumes.

This is the exact representation of my comfiguration.
Any insight would be very helpful and appreciated.

/ppp profile
add change-tcp-mss=yes name=“Zen Profile” use-compression=no use-encryption=no use-mpls=no
/interface pppoe-client
add add-default-route=yes disabled=no interface=ether5-ADSL max-mru=1492 max-mtu=1492 mrru=1600 name=“Zen PPPoE” password=***** profile=“Zen Profile” user=zen*****@zen

Does it go back to being slow when you put the routerboard back on?

That is correct

What settings were changed over those three days?

That is the strange thing. Nothing.
Was working, then became very slow.
I disabled all ports except for the WAN and it remained slow.

The end user claimed it to be very stable and fast, then it dropped. Perhaps the Zyxel is causing a problem?