Reply

AARRGGH - Help - lost connections

Firtrees
Novice

AARRGGH - Help - lost connections

Hi

I have searched the forum for answers, and whilst I can see similar themes, I haven't been able to solve my problem.

Background
I have a Net gear DG834G set to 'modem only' mode which my Netgear Nighthawk is plugged into in order to give me a PPoE connection.

I have a static IP address assigned by my Internet provider (BT) which I know is unusual but is the case

The nighthawk firmware has been updated to V1.0.4.18_1.1.52

The DG834G has been used as my modem and router for many years without any problems.

Problem
The Nighthawk keeps dropping the internet connection. There is no obvious pattern, but it is regular and from every 5 to 10 minutes up to a few hours.

The router does re-establish the connection, but sometimes needs a push, in which case I go to the advanced tab and use the internet connection status option, where I can use the disconnect and connect button to re-establish the connection. It's doesn't always reconnect on the first attempt but generally does so if a a bit of patience is used.

During the disconnect, the modem is identifying that it is a connected to the internet without problem, so it appears to be the connection between the router and modem that is causing the problem although this is a guesswork on my part.

Net gear support

I contacted support and went through all the settings, which they confirmed are correct. Their advice to me was to put the nighthawk into 'Wireless AP mode' and reset my DG834G in 'modem and router' mode.

I don't want to do this, as one of the reason I have invested in the Nighthawk is that I understand that it has better router functionality, such as Port Forwarding / Port Triggering functionality which I want to utilise with a Synolgy NAS I have put ont the network.

The advice also feels like a workaround and not a fix. The support did not fill me with confidence with some of the earlier suggestions, such as Changing the wireless channel!

Logs

I can't see anything in the logs that helps me. A sample pasted below

[Internet connected] IP address: 81.130.193.220, Monday, Feb 23,2015 11:02:15
[Admin login] from source 192.168.1.3, Monday, Feb 23,2015 10:57:58
[Internet disconnected] Monday, Feb 23,2015 10:57:28
[Time synchronized with NTP server] Monday, Feb 23,2015 10:43:59
[Internet connected] IP address: 81.130.193.220, Monday, Feb 23,2015 10:43:34
[Internet disconnected] Monday, Feb 23,2015 10:41:24
[Time synchronized with NTP server] Monday, Feb 23,2015 10:38:00
[Internet connected] IP address: 81.130.193.220, Monday, Feb 23,2015 10:37:54
[Internet disconnected] Monday, Feb 23,2015 10:35:30
[Time synchronized with NTP server] Monday, Feb 23,2015 10:30:44
[Internet connected] IP address: 81.130.193.220, Monday, Feb 23,2015 10:30:44
[Internet disconnected] Monday, Feb 23,2015 10:28:25
[Time synchronized with NTP server] Monday, Feb 23,2015 10:16:56



HELP

Am I right to to want to use the nighthawk as the router and not the DG834 as advised by Net gear support ?

Do you think it is a problem with the modem router connection, or the internet connection with my provider?

Any suggestions to a fix?

Thanks
Mike
Message 1 of 16
Firtrees
Novice

Re: AARRGGH - Help - lost connections

Hi again

Any help, or pointers would be much appreciated. This is driving me mad! :confused:
Message 2 of 16
Retired_Member
Not applicable

Re: AARRGGH - Help - lost connections

WAN Setup section....... Did you try changing the MTU? The normal MTU (Maximum Transmit Unit) value for most Ethernet networks is 1500 Bytes, 1492 Bytes for PPPoE connections, 1436 for PPTP, or 1428 for L2TP connections. For some ISPs you may need to reduce the MTU. But this is rarely required, and should not be done unless you are sure it is necessary for your ISP connection
Message 3 of 16
netwrks
Master

Re: AARRGGH - Help - lost connections

I would think the R7000 would have a better feature set.

Were you using the R7000 prior to FW upgrade? If yes, was there an issue before the upgrade? If there wasn't an issue before upgrade then you should factory reset the R7000. (FYI.. Depress reset button on the back with a paper clip, until power button flashes. Then let go and wait for the Power LED to become solid again). This "should" have restored the R700 to factory settings for FW running.

Other things to try if FW is not an issue..

Can you re-seat (or replace the RJ45 cable) between DG834G and R7000?

Have you rebooted both DG834G and R7000?
Message 4 of 16
Firtrees
Novice

Re: AARRGGH - Help - lost connections

searay, Thanks Smiley Happy The internet provider advices 1458 so I have set it to 1458. I also found this link http://www.tp-link.us/article/?faqid=190 which explained the mtu really well, and using its approach found that I needed to reduce to 1300 before the packets weren't fragmented. So that would suggest that 1328 is my optimum size which I will give a try.
Message 5 of 16
Firtrees
Novice

Re: AARRGGH - Help - lost connections

netwrks, I was using the R7000 prior to the FW upgrade and was having the same problems before. Actually the upgrade appears to have improved the situation, and it reconnects quicker - but then I could just be imagining this. Yes, its a new RJ45 cable, the one that came with the router, and I have checked the connection physically. Yes, I have done reboots on both modem and router, but it hasn't helped Appreciate your suggestions
Message 6 of 16
Firtrees
Novice

Re: AARRGGH - Help - lost connections

Feedback
Early days yet, but changing the MTU to 1328 has had a significant improvement no the number of drop outs.

I have had two disconnects in the last day, which quickly reconnected themselves.

Thanks for your suggestions.
Message 7 of 16
Babylon5
NETGEAR Employee Retired

Re: AARRGGH - Help - lost connections

Some people see lowering the MTU as a loss of performance, I’m not saying anyone here is, but I would like to point out that the MTU would need to be reduced to a very low value before there would be any noticeable reduction in throughput. Clearly it’s better to have the MTU set below the fragmentation value.
____________________________
Working on behalf of Netgear
My name is Andy
Message 8 of 16
HiSpeed
Guide

Re: AARRGGH - Help - lost connections

Hello Firtrees,

Did you try to don't use the "modem only" mode, just for testing?
I mean to cascade the routers (PPPoA into your DG834G and Static IP into your R7000).
That requires 2 separate IP address segments, a DMZ into the DG834G with firewall disabled.

● Netgear R7000 (Root Router)
● TP-Link Archer C7 v2 (WDS Bridge)


Message 9 of 16

Re: AARRGGH - Help - lost connections

Fitress, Add the PPoE connection on the r7000 and change the time out setting to 0. It doesn't hurt to have PPoE auth on both devices, and you may find doing so keeps the connection between your DG834G and R7000 alive.
~Comcast 1 Gbps/50 Mbps SB8200 > R8000P
~R8000P FW:1.4.1.68 ~R7000 FW:1.0.9.42
~R6400 FW:1.0.1.52 ~Orbi-AC3000 FW:2.5.1.8
~EX3700 FW:1.0.0.84

Message 10 of 16
Firtrees
Novice

Re: AARRGGH - Help - lost connections

Well, back to the drawing board. At this rate I'll be bald when I have finished pulling my hair out!

The drops out started to become more frequent again, so the MTU change didn't make a difference. But it did stop my xbox connecting to the internet. As soon as I put the mtu back to 1458 from 1328 the xbox connected to the internet ok.


HiSpeed,

Iam not sure I understand your suggestion. I can have the DG834 in modem mode and use the R7000 as the router (current flawed setup) or, use the DG834 as the modem and router, then have the R7000 in AP mode. Using the DG834 as a modem and router I have no problems. But this approach means I am not getting a lot of value from the R7000.

Shadowsports,

The PPoE is on the R7000 only. Because the connection mode is set to 'always on' I can't adjust the time out setting - Unless I am looking at the wrong thing? (Advanced, Setup, Internet setp up).

There is no user authentication on the DG834 in modem only mode. As I understand it, it does NOT make the connection to my ISP. The modem only does the signal modulation on the line. It takes the ethernet signals and converts them to transmit them to the ADSL line. That's all it does.

Just a thought, could this be my problem?

When I set the DG834 to PPoA, which is the configuration required by my Internet provider on the ADSL line it wouldn't work. It worked when I was using it as modem and router. So I read this on the net,

"In some areas where ADSL services are running over older core networks you may find that the above does not work. To remedy this disconnect the DG834 from the router. Connect the DG834 directly to your computer and log into the web configuration as above. In ADSL settings, select LLC from the 'encapsulation' drop down box. " (Relevant extract from http://vpncasestudy.com/download/DG/DG834_Tips100.pdf

Setting the DG834 to LLC allowed me to connect, (R7000 is set to PPoE. PPoA is not an option on the R7000) but Iam suffering the drop outs
Message 11 of 16
HiSpeed
Guide

Re: AARRGGH - Help - lost connections

You can use a double routing without problem.

The modem encapsulates PPPoA to manage your ADSL line then your R7000 WAN set in Static (or Dynamic) IP has no need to do an encapsulation...

This configuration requires only to use 2 separate segments (for example 192.168.0 for the modem and 192.168.1 for your R7000 and local network), to do a DMZ on the modem (to open all ports controlled behind by the R7000), to disable the modem firewall, ant that it...

● Netgear R7000 (Root Router)
● TP-Link Archer C7 v2 (WDS Bridge)


Message 12 of 16
Firtrees
Novice

Re: AARRGGH - Help - lost connections

I can't see an edit button for my post, so just to be clear.

When the DG834 is in modem mode. The only ADSL settings available are
Multiplexing Method - VC or LLC based
VPI and VCI

Everything else is set on the R7000 router

I have the modem set to LLC, VPI = 0 and VCI - 38
Message 13 of 16
HiSpeed
Guide

Re: AARRGGH - Help - lost connections

Have a look to what I wrote : here !

Smiley Wink

● Netgear R7000 (Root Router)
● TP-Link Archer C7 v2 (WDS Bridge)


Message 14 of 16
Firtrees
Novice

Re: AARRGGH - Help - lost connections

A quick update in case it helps anybody else.

I think I have solved my problem. Having explored all configuration options, I decided to swap the Netgear DG834 for a Draytek Vigor 130 modem. Since installing the Vigor 130 I have not had one single dropped connection.

Whilst I don't know the exact cause of my problem, I think it was the connection between the DG834 and nighthawk that was disconnecting even though the DG834 was in modem mode. As to why, who knows?

This is a 'proper' fix in my mind and means I can use all the functions of the Nighthawk unlike the Netgear support suggestion of using the Nighthawk in Access point mode with the DG834 acting as a modem/router.

Thanks to all that offered help and assistance.
Message 15 of 16

Re: AARRGGH - Help - lost connections

Always nice to hear of resolution, even on the elusive issues we all try to help solve.
~Comcast 1 Gbps/50 Mbps SB8200 > R8000P
~R8000P FW:1.4.1.68 ~R7000 FW:1.0.9.42
~R6400 FW:1.0.1.52 ~Orbi-AC3000 FW:2.5.1.8
~EX3700 FW:1.0.0.84

Message 16 of 16
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