THE_DEAD_POOL Posted February 28, 2018 Share Posted February 28, 2018 I have recently switched to a VDSL connection and am using a Technicolor C2100T Modem/Router. I cannot seem to be able to bridge the Modem and use the Netduma. The modem locks up and has to be reset to factory settings before reconnecting to the internet which takes 5+ minutes a pop. ISP is Century Link. I entered the PPPoe credentials into the Netduma. The Netduma never connects to the internet while the Modem is bridged. I have not factory reset the Netduma. Am I missing something as part of the set up? Anyone else run into this issue? Thanks for any advice. I am new to VDSL and bridging modems. Link to comment Share on other sites More sharing options...
RL317 Posted February 28, 2018 Share Posted February 28, 2018 As far as I can tell you're doing everything right. I'm new to using a separate modem (well it's a modem/router but I use it in bridge mode) after ditching an ISP combo that couldn't bridge, but all I had to do was enable PPPoE on the R1 and type in the generic username and password, and voilà. If the modem needs to be reset maybe that's what's causing the problem. Or do you just mean that after enabling PPPoE on the R1 you can no longer access the modem GUI? Perhaps there's a new password you have to enter for your ISP that you could find with a bit of Googling. Then again with my ISP we don't need to use a specific password so idk ¯\_(ツ)_/¯ Edit: maybe you have to change the modem MTU? I'm using a TP Link which defaults to 1480 while I'm on VDSL2 which obviously needs 1492. Maybe there's an issue there. Link to comment Share on other sites More sharing options...
THE_DEAD_POOL Posted February 28, 2018 Author Share Posted February 28, 2018 As far as I can tell you're doing everything right. I'm new to using a separate modem (well it's a modem/router but I use it in bridge mode) after ditching an ISP combo that couldn't bridge, but all I had to do was enable PPPoE on the R1 and type in the generic username and password, and voilà. If the modem needs to be reset maybe that's what's causing the problem. Or do you just mean that after enabling PPPoE on the R1 you can no longer access the modem GUI? Perhaps there's a new password you have to enter for your ISP that you could find with a bit of Googling. Then again with my ISP we don't need to use a specific password so idk ¯\_(ツ)_/¯ Edit: maybe you have to change the modem MTU? I'm using a TP Link which defaults to 1480 while I'm on VDSL2 which obviously needs 1492. Maybe there's an issue there. From what I understand with CenturyLink, each account is given its own personal PPPoe login which is then verified on CenturyLink's side and establishes the internet connection. Which I verified. Also I should note, the Tech could not get the Netduma to work with the bridged modem either. He couldn't understand why because everything looked correct. He was saying the modem should not be reset after bridging. Plug in the Duma with the credentials and it should work. For whatever reason it just wouldn't work. He also verified the Modem is truly bridged. I could check the MTU settings. I'm pretty sure it is set to automatic on the Netduma. I believe the tech said it should be 1400. Should the Modem be put in bridged mode with the Netduma connected? Link to comment Share on other sites More sharing options...
Netduma Staff Netduma Jack Posted March 1, 2018 Netduma Staff Share Posted March 1, 2018 If you don't try to set up Bridge Mode, do you get Internet access? Why are you trying to set up Bridge Mode? You could potentially put the Netduma in the DMZ of your modem to achieve a similar effect if Bridge Mode isn't working out. Definitely leave MTU set to Automatic. Usually you should just be able to plug in, enter your PPPoE details and go. Let us know if you don't have Internet access or if there are any other issues happening. Link to comment Share on other sites More sharing options...
RL317 Posted March 1, 2018 Share Posted March 1, 2018 As Jack said, can you get online through the R1 if you leave the modem in PPPoE mode? Mine works like that too, although the R1 then gets a private IP (shown on the device manager, starting 192.168.88...) and I end up with double NAT. That's not really a problem as long as you DMZ the R1 on the modem GUI. I've noticed I don't have to set it up in a specific order, or reboot anything, for it to work in bridge mode as long as I just hit enable PPPoE on the R1 and type everything back in. I think I've heard some people on my ISP (BT in the UK) have reported getting online by not using a password at all Link to comment Share on other sites More sharing options...
RL317 Posted March 1, 2018 Share Posted March 1, 2018 Okay I would ask if you're doing auto setup on the modem but you said it was confirmed to be in bridge mode so that's probably not an issue. If I choose auto setup on mine it either fails if I've previously had a connection through it, or I can clear that connection and it'll automatically set up in PPPoE mode rather than bridge mode. So the first screenshot below is an example of that - always use manual setup to maintain control over your settings, assuming yours has an auto and manual setup option too. On the next screen, after I tell the modem I want to set up manually in bridge mode, it asks the ISP (not really important - I can use 'other' as long as I choose VDSL), and then it asks for the line type. Once you choose either ADSL or VDSL it'll ask for either the VCI and VPI or the VLAN ID respectively. Assuming you've got these options and the ability to manually set up in bridge mode at all, have you got the right VLAN ID for CenturyLink VDSL? My modem chooses the right numbers depending on the ISP preset that I select, so I guess it's basically also a kind of auto setup but with a little more control lol. I just did a little search for CenturyLink settings for those with third party modems and the general consensus matches what I took in my fourth screenshot. So it seems the VLAN ID of 201 is key. You might have already been putting this in because you already knew that, but if not give it a try - especially if you can find a manual set up method. Then of course just ignore the mention of PPPoE above and choose bridge mode Link to comment Share on other sites More sharing options...
THE_DEAD_POOL Posted March 1, 2018 Author Share Posted March 1, 2018 Okay I would ask if you're doing auto setup on the modem but you said it was confirmed to be in bridge mode so that's probably not an issue. If I choose auto setup on mine it either fails if I've previously had a connection through it, or I can clear that connection and it'll automatically set up in PPPoE mode rather than bridge mode. So the first screenshot below is an example of that - always use manual setup to maintain control over your settings, assuming yours has an auto and manual setup option too. On the next screen, after I tell the modem I want to set up manually in bridge mode, it asks the ISP (not really important - I can use 'other' as long as I choose VDSL), and then it asks for the line type. Once you choose either ADSL or VDSL it'll ask for either the VCI and VPI or the VLAN ID respectively. Assuming you've got these options and the ability to manually set up in bridge mode at all, have you got the right VLAN ID for CenturyLink VDSL? My modem chooses the right numbers depending on the ISP preset that I select, so I guess it's basically also a kind of auto setup but with a little more control lol. I just did a little search for CenturyLink settings for those with third party modems and the general consensus matches what I took in my fourth screenshot. So it seems the VLAN ID of 201 is key. You might have already been putting this in because you already knew that, but if not give it a try - especially if you can find a manual set up method. Then of course just ignore the mention of PPPoE above and choose bridge mode Yeah I followed those settings. Spent a couple hours yesterday trying to bridge it to the Netduma. Ensured the tags were correct. Tried bridging with everything automatic. Then with everything set manually. Nothing would work. The Netduma would never get an IP. Came across a thread on dslreports where someone had stated they were not able to bridge that modem to their Netduma. Could just be one of those modems. I have since placed the Netduma into the DMZ and placed everything behind the Netduma. So far have not had any NAT issues. So I may just run it as is. If you don't try to set up Bridge Mode, do you get Internet access? Why are you trying to set up Bridge Mode? You could potentially put the Netduma in the DMZ of your modem to achieve a similar effect if Bridge Mode isn't working out. Definitely leave MTU set to Automatic. Usually you should just be able to plug in, enter your PPPoE details and go. Let us know if you don't have Internet access or if there are any other issues happening. Yes it does connect to the internet when the C2100T is not bridged. I was just noticing some ping spikes while running Ping Plotter and was trying to see if perhaps bridging the modem would correct those. Unfortunately even with the correct PPPoE credentials, it would not connect after putting the C2100T in bridge mode. The Netduma never receives an IP from CenturyLink's servers I guess. Is putting the router in the DMZ the same as Bridging the modem? Should bypass all routing aspects on the C2100T correct? Link to comment Share on other sites More sharing options...
RL317 Posted March 1, 2018 Share Posted March 1, 2018 Good to know you can keep it in PPPoE mode and get a connection like that. It's not ideal but as long as everything works it'll do just fine until you can figure out if the modem is the problem. Sucks that you'd have to potentially spend more money just to rule that out And yeah as long as the R1 is in DMZ everything gets passed through to it, it's essentially the same as bridging. The only possible issue with a two router setup comes from double NAT but that's what DMZ is for Link to comment Share on other sites More sharing options...
Netduma Staff Netduma Jack Posted March 2, 2018 Netduma Staff Share Posted March 2, 2018 DMZ is a great workaround for when bridge mode isn't working as intended. I'd recommend giving that a shot though I'm not sure if that'll fix ping spikes personally. Ping Spikes in my experience have always pointed to equipment faults / faulty Ethernet cables / line faults. I could be wrong though, so let us know how you get on and if you try out DMZ Link to comment Share on other sites More sharing options...
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