PPPoE config on a Bigpipe ADSL

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lexa

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#175005 13-Jun-2015 13:11

Hi GZ !

I try to connect to my ISP Bigpipe who had gently activate PPPoE on my adsl connection.
The goal is to avoid a double NATand learn some stuff about networking.

The infos from BigPipe are :

We have set up your line for PPPoE login now.

Can you please try to reconfigure your settings as follows

VPI: 0

VCI: 110

PPP Protocol: PPPoE

Encapsulation: 802.1Q

VLAN ID: 10

PCP / QoS Marking: 0

PPP Username / password: anything, just not blank.

My lan is 192.168.26.0/24

In first Modem side (DG834G v4 - Modem mode):

Nothing else on modem...

This modem is pluged in the WAN port of my R7000 running DD-WRT

Second point, DD-WRT, what I did...

Setup / Basic Setup

Setup / Vlans

Setup / Networking

I never get WAN IP address from the modem.

I think I miss something... But the network, especially PPP, is really not my area of skill...
Every advice are welcome.

Cheers,

sbiddle

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#1324036 13-Jun-2015 13:44

30 seconds on Google suggests to me your modem doesn't support bridge mode unless you have specific firmware and hacks in place. Have you done that?

You would also normally tag the VLAN on the modem when in bridge mode, so no VLAN tagging would be required on the router.

My recommendation would be go and buy a decent modem to achieve what you're wanting to do. A Draytek DV120 or DV130 works brilliantly and also does native PPPoA to PPPoE conversion.

lexa

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#1324052 13-Jun-2015 14:15

sbiddle: 30 seconds on Google suggests to me your modem doesn't support bridge mode unless you have specific firmware and hacks in place. Have you done that?

You would also normally tag the VLAN on the modem when in bridge mode, so no VLAN tagging would be required on the router.

My recommendation would be go and buy a decent modem to achieve what you're wanting to do. A Draytek DV120 or DV130 works brilliantly and also does native PPPoA to PPPoE conversion.

sbiddle

Hi sbiddle,

Yes, I flashed the DG834G with a specific firmware, in first not to be able to have a modem mode, but to be able to do SNR tweak.
I can get a 5Mbs (stable) rather a 3Mbs, for a long distance connection like mine is very important

Unfurtunatly, when the modem is in modem mode, there is not a lot of option, and no VLAN option on the modem.

I spent a lot of time to search the best modem / router-modem could be nice to take the best of my long line, draytek have a very good reputation.
But I won't able to change my SNR.
I did a test with a spark modem, And I can obtain a better line attenuation than the old DG834 (49dB against 52dB).
So I have to fine a good modem with the more recent Broadcom chipset (BCM63168) AND keep an SNR feature.

But it's not the subject here, today I have to use these gears :)

sbiddle

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#1324056 13-Jun-2015 14:21

My only advice is to buy a better modem as it's probably not supporting VLAN passthru. The setup you're trying to achieve is not something I've ever seen anybody else on here want to do. You either buy a modem/router than supports VLAN tagging for EUBA PPPoE or you use a Draytek for PPPoA to PPPoE conversion.

yitz

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#1324069 13-Jun-2015 14:47

The Netcomm Wireless NB604N is based on the BCM63281 and goes for cheap on TradeMe (it's given away by a few ISPs)

Supports ADSL2+ and SNR margin tweak through built-in Broadcom adslctl command
Supports RFC1483 RFC2684 bridged and VlanID Mux (Ethernet over ATM)

The upside of the Draytek and its PPPoA to PPPoE conversion is you can use it on BUBA line or other such reason when EUBA 0/110 is not supported.

RunningMan

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#1324171 13-Jun-2015 19:25

Try taking the hsotname and domain name out of the PPPoE settings - these may be getting passed through as a "service name" which will interfere with the PPPoE connection.

Take the modem out of the same subnet as the LAN - currently both LAN and the modem are in the class C 192.168.26.x

Does the modem have an option for full bridge or similar in it's setup with thar firmware?

Also, not that familiar with DD-WRT, but you haven't just created a bridge to the WAN port have you - have you got NAT enabled through to the LAN?

hio77

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#1324178 13-Jun-2015 19:34

As another Alternative, a good old RTA1320 is always a good option.

I planned to use one for the exact setup your running, until i discovered in testing VF support dhcp over a tagged port.

as runningman pointed out, try stripping back to basic settings.

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Aredwood

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#1324306 14-Jun-2015 00:45

I have an old rta1320 if it is of any use to the OP. would just have to test it first.

RunningMan

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#1324326 14-Jun-2015 08:54

Probably stating the obvious if BigPipe have activated this, but you are on a EUBA connection aren't you?

sbiddle

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#1324343 14-Jun-2015 09:19

hio77: As another Alternative, a good old RTA1320 is always a good option.

I planned to use one for the exact setup your running, until i discovered in testing VF support dhcp over a tagged port.

as runningman pointed out, try stripping back to basic settings.

It is always possible that this setup isn't going to work with older hardware.

As I mentioned such a setup is incredibly rare - I've never seen a single person before on here ask to do what the OP is trying to do for ADSL2+

Using a modern modem (such as a Dratek or Netcomm) in full bridge mode with 802.1q tagging done on the modem and a router behind it doing PPPoE will work perfectly and is a very common setup for VDSL2 installs.

I spent quite some time playing with a setup like the OP is trying a few years ago and couldn't get it to work with a few different modems. The problem seemed to be the modem not really liking the VMUX setup and not supporting VLAN tagging on the router.

You can try and experiment and I'd be interested to know, but it is entirely possible the setup won't work without going and buying new better quality hardware.

RunningMan

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#1324358 14-Jun-2015 09:49

I have done it as the OP is trying, with the router doing the tagging, however using different hardware. I used an RTA1320 and it was fine

hio77

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#1324500 14-Jun-2015 17:09

sbiddle:
It is always possible that this setup isn't going to work with older hardware.

As I mentioned such a setup is incredibly rare - I've never seen a single person before on here ask to do what the OP is trying to do for ADSL2+

Using a modern modem (such as a Dratek or Netcomm) in full bridge mode with 802.1q tagging done on the modem and a router behind it doing PPPoE will work perfectly and is a very common setup for VDSL2 installs.

I spent quite some time playing with a setup like the OP is trying a few years ago and couldn't get it to work with a few different modems. The problem seemed to be the modem not really liking the VMUX setup and not supporting VLAN tagging on the router.

You can try and experiment and I'd be interested to know, but it is entirely possible the setup won't work without going and buying new better quality hardware.

I have both a RTA1320 and a TG582n which both run this exact setup well. Obvously as the OP wants to tinker the TG582n is off the list, that had the tweaking removed - although an older firmware would be a potential solution. Vlaned interface for internet, untagged static for access to the UI on pfsense.

Absolutely though, it is a setup that often isnt looked at. Far easier to use a DV120 with a PPPoE to PPPoA conversion, That is a setup that Always works.

Also the exact setup can vary slightly between isps, No one solution is the win all at all!

my best advice would be find a few options, sit down on a day when nobody is going to moan about the lack of internet and play with it..

Worst case, you could always do PPPoA in halfbridge (IP Extension in some modems) but thats a whole different kettle of fish.

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Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.