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Can anyone tell me the cause of these disconnects?

SteveArnold
Dabbler
Posts: 24
Registered: 12-08-2007

Can anyone tell me the cause of these disconnects?

Hi,
I have a Billion 7800N and my line had been stable for around a month untill 2 disconnects, can anyone tell me if there are any clues in the log as to what caused them?
Aug 05 00:44:05  user  kernel: Line 0: ADSL link down
  Aug 05 00:44:05  user  syslog: tc qdisc del dev ppp_0_0_38_1 root 2>/dev/null
  Aug 05 00:44:06  user  kernel: Line 0: xDSL G.994 training
  Aug 05 00:44:08  daemon  pppd[458]: Terminating connection due to link down.
  Aug 05 00:44:12  user  kernel: Line 0: ADSL G.992 started
  Aug 05 00:44:15  user  kernel: Line 0: ADSL G.992 channel analysis
  Aug 05 00:44:19  user  kernel: Line 0: ADSL G.992 message exchange
  Aug 05 00:44:19  user  kernel: Line 0: ADSL link up, interleaved, us=448, ds=7840
  Aug 05 00:44:22  daemon  pppd[458]: Clear IP addresses.  Connection DOWN.
  Aug 05 00:44:22  daemon  pppd[458]: Clear IP addresses.
  Aug 05 00:44:22  daemon  pppd[458]: Couldn't increase MTU to 1500.
  Aug 05 00:44:22  daemon  pppd[458]: Connection terminated.
  Aug 05 00:44:22  daemon  pppd[458]: Connect time 37139.8 minutes.
  Aug 05 00:44:22  daemon  pppd[458]: Sent 2081723717 bytes, received 3118096201 bytes.
  Aug 05 00:44:22  user  kernel: dev_shutdown, dec ppp device refcnt, dev->refcnt=3
  Aug 05 00:44:22  user  kernel: unregister_netdevice: waiting for ppp_0_0_38_1 to become free. Usage count = -1
  Aug 05 00:44:22  user  kernel: dev->name = ppp_0_0_38_1, dev->refcnt=-1
  Aug 05 00:44:22  user  kernel: after reset to 0, dev->refcnt=0
  Aug 05 00:44:22  daemon  pppd[458]: PPP: Start to connect ...
  Aug 05 00:44:24  daemon  pppd[458]: Using interface ppp0_0_38_1
  Aug 05 00:44:24  daemon  pppd[458]: Connect: ppp_0_0_38_1 <-->
  Aug 05 00:44:24  daemon  pppd[458]: Couldn't increase MTU to 1500.
  Aug 05 00:44:27  daemon  pppd[458]: PPP LCP UP.
  Aug 05 00:44:27  daemon  pppd[458]: Couldn't increase MTU to 1500.
  Aug 05 00:44:27  daemon  pppd[458]: PPP LCP UP.
  Aug 05 00:44:28  daemon  pppd[458]: local  IP address xxx.xxx.xxx.xxx
  Aug 05 00:44:28  daemon  pppd[458]: remote IP address 195.166.128.232
  Aug 05 00:44:28  daemon  pppd[458]: primary  DNS address 212.159.6.9
  Aug 05 00:44:28  daemon  pppd[458]: secondary DNS address 212.159.6.10
  Aug 05 00:44:28  daemon  dnsmasq[92]: using nameserver 212.159.6.10#53
  Aug 05 00:44:28  daemon  dnsmasq[92]: using nameserver 212.159.6.9#53
  Aug 05 00:44:28  daemon  pppd[458]: Received valid IP address from server.  Connection UP.
  Aug 05 00:44:28  user  syslog: begin: interface: ppp_0_0_38_1 go to up
  Aug 05 00:44:28  daemon  dnsmasq[92]: using nameserver 212.159.6.10#53
  Aug 05 00:44:28  daemon  dnsmasq[92]: using nameserver 212.159.6.9#53
  Aug 05 00:44:28  daemon  UPNPD[7388]: received signal 15, good-bye
  Aug 05 00:44:30  daemon  UPNPD[8464]: HTTP listening on port 2800
  Aug 05 00:44:32  user  syslog: end: interface: ppp_0_0_38_1 go to up
  Aug 05 00:59:34  syslog  -- MARK --
--------
  Aug 07 05:59:33  syslog  -- MARK --
  Aug 07 06:15:05  daemon  pppd[458]: LCP terminated by peer
  Aug 07 06:15:05  daemon  pppd[458]: LCP terminated by peer
  Aug 07 06:15:05  daemon  pppd[458]: Clear IP addresses.  Connection DOWN.
  Aug 07 06:15:05  daemon  pppd[458]: Clear IP addresses.
  Aug 07 06:15:05  daemon  pppd[458]: Couldn't increase MTU to 1500.
  Aug 07 06:15:06  user  syslog: begin: interface: ppp_0_0_38_1 go to down
  Aug 07 06:15:06  user  syslog: end: interface: ppp_0_0_38_1 go to down
  Aug 07 06:15:08  daemon  pppd[458]: Connection terminated.
  Aug 07 06:15:08  daemon  pppd[458]: Connect time 3210.8 minutes.
  Aug 07 06:15:08  daemon  pppd[458]: Sent 145918493 bytes, received 665423623 bytes.
  Aug 07 06:15:08  user  kernel: dev_shutdown, dec ppp device refcnt, dev->refcnt=3
  Aug 07 06:15:09  user  kernel: unregister_netdevice: waiting for ppp_0_0_38_1 to become free. Usage count = -1
  Aug 07 06:15:09  user  kernel: dev->name = ppp_0_0_38_1, dev->refcnt=-1
  Aug 07 06:15:09  user  kernel: after reset to 0, dev->refcnt=0
  Aug 07 06:15:12  daemon  pppd[458]: PPP: Start to connect ...
  Aug 07 06:15:13  daemon  pppd[458]: Using interface ppp0_0_38_1
  Aug 07 06:15:13  daemon  pppd[458]: Connect: ppp_0_0_38_1 <-->
  Aug 07 06:15:13  daemon  pppd[458]: Couldn't increase MTU to 1500.
  Aug 07 06:15:16  daemon  pppd[458]: PPP LCP UP.
  Aug 07 06:15:17  daemon  pppd[458]: Couldn't increase MTU to 1500.
  Aug 07 06:15:17  daemon  pppd[458]: PPP LCP UP.
  Aug 07 06:15:17  daemon  pppd[458]: local  IP address xxx.xxx.xxx.xxx
  Aug 07 06:15:17  daemon  pppd[458]: remote IP address 195.166.128.229
  Aug 07 06:15:17  daemon  pppd[458]: primary  DNS address 212.159.6.9
  Aug 07 06:15:17  daemon  pppd[458]: secondary DNS address 212.159.6.10
  Aug 07 06:15:18  daemon  dnsmasq[92]: using nameserver 212.159.6.10#53
  Aug 07 06:15:18  daemon  dnsmasq[92]: using nameserver 212.159.6.9#53
  Aug 07 06:15:18  daemon  pppd[458]: Received valid IP address from server.  Connection UP.
  Aug 07 06:15:18  user  syslog: begin: interface: ppp_0_0_38_1 go to up
  Aug 07 06:15:18  daemon  UPNPD[8464]: received signal 15, good-bye
  Aug 07 06:15:20  daemon  UPNPD[8902]: HTTP listening on port 2800
  Aug 07 06:15:22  user  syslog: end: interface: ppp_0_0_38_1 go to up
  Aug 07 06:59:33  syslog  -- MARK --
Thanks
Steve
10 REPLIES
Community Veteran
Posts: 4,854
Thanks: 121
Fixes: 24
Registered: 14-07-2009

Re: Can anyone tell me the cause of these disconnects?

Quote from: SteveArnold

  Aug 05 00:44:05  user  kernel: Line 0: ADSL link down
  Aug 05 00:44:08  daemon  pppd[458]: Terminating connection due to link down.
 
--------
  Aug 07 06:15:05  daemon  pppd[458]: LCP terminated by peer
  Aug 07 06:15:05  daemon  pppd[458]: LCP terminated by peer
  Aug 07 06:15:08  daemon  pppd[458]: Connection terminated.
 

To use a telephone call analogy, in the first instance it looks like the line went dead.  In the second instance does "terminated by peer" mean that Plusnet did the broadband equivalent of putting the phone down on you?
matt_2k34
Grafter
Posts: 1,300
Registered: 09-07-2007

Re: Can anyone tell me the cause of these disconnects?

Hi Steve
ReedRichards is on the money above^
They're both nothing really to worry about, the first was probably caused by routine BT maintenance tbh (seen as its between 00:00 and 03:00) -- although the connection came back very quickly (could of been just a random blip though)
the second was probably either the same as above - or:
a) pn maintenance
b) DLM changing your profile/line settings
c)pn changing your ip/traffic management profile
d) completely random one-off event Smiley

I certainly wouldnt be too concerned, around 1 month uptime is absolutely fantastic tbh.
Quote
System Up-Time 26 Day(s) 0 Hour(s)

^^ my 7800n Smiley
Regards
lexusuk
Grafter
Posts: 567
Registered: 20-10-2009

Re: Can anyone tell me the cause of these disconnects?

Hi SteveArnold,
I've checked our connection logs for your line and the amount and frequency of disconnections are nothing to worry at the moment.  See below:

Certainly monitor this however and let us know if they continue/get worse.
SteveArnold
Dabbler
Posts: 24
Registered: 12-08-2007

Re: Can anyone tell me the cause of these disconnects?

Hi,
Thanks for the replies, 25 days is a record my previous best IIRC is around 8 days.
The only moan I have about the 7800N is the log only appears to hold around 4 days entries, records a --mark-- every hour and theres no way to have it send a email if there is a disconnect, unless anyone knows otherwise?
Thanks
Steve
matt_2k34
Grafter
Posts: 1,300
Registered: 09-07-2007

Re: Can anyone tell me the cause of these disconnects?

Steve, the 7800N has a syslog function.
This means that you can get it to send those "logs" to another machine (provided the receiving machine is on of course!) which will add the lines to a database (dependant on what software you use)
This means you can scroll through the logs, and see "what happened" even if the router reboots unexpectedly!
Regards
SteveArnold
Dabbler
Posts: 24
Registered: 12-08-2007

Re: Can anyone tell me the cause of these disconnects?

Hi,
It appears I had another disconnect:
Aug 08 22:54:08  user  kernel: Line 0: ADSL link down
  Aug 08 22:54:08  user  syslog: tc qdisc del dev ppp_0_0_38_1 root 2>/dev/null
  Aug 08 22:54:09  user  kernel: Line 0: xDSL G.994 training
  Aug 08 22:54:10  daemon  pppd[9175]: Terminating connection due to link down.
  Aug 08 22:54:15  user  kernel: Line 0: ADSL G.992 started
  Aug 08 22:54:17  user  kernel: Line 0: ADSL G.992 channel analysis
  Aug 08 22:54:22  user  kernel: Line 0: ADSL link up, interleaved, us=448, ds=8128
  Aug 08 22:54:24  daemon  pppd[9175]: Clear IP addresses.  Connection DOWN.
  Aug 08 22:54:24  daemon  pppd[9175]: Clear IP addresses.
  Aug 08 22:54:24  daemon  pppd[9175]: Couldn't increase MTU to 1500.
  Aug 08 22:54:24  daemon  pppd[9175]: Connection terminated.
  Aug 08 22:54:24  daemon  pppd[9175]: Connect time 592.4 minutes.
  Aug 08 22:54:24  daemon  pppd[9175]: Sent 38232711 bytes, received 1593277881 bytes.
  Aug 08 22:54:24  user  kernel: dev_shutdown, dec ppp device refcnt, dev->refcnt=3
  Aug 08 22:54:24  user  kernel: unregister_netdevice: waiting for ppp_0_0_38_1 to become free. Usage count = -1
  Aug 08 22:54:24  user  kernel: dev->name = ppp_0_0_38_1, dev->refcnt=-1
  Aug 08 22:54:24  user  kernel: after reset to 0, dev->refcnt=0
  Aug 08 22:54:24  daemon  pppd[9175]: PPP: Start to connect ...
  Aug 08 22:54:26  daemon  pppd[9175]: Using interface ppp0_0_38_1
  Aug 08 22:54:26  daemon  pppd[9175]: Connect: ppp_0_0_38_1 <-->
  Aug 08 22:54:26  daemon  pppd[9175]: Couldn't increase MTU to 1500.
  Aug 08 22:54:29  daemon  pppd[9175]: PPP LCP UP.
  Aug 08 22:54:29  daemon  pppd[9175]: Couldn't increase MTU to 1500.
  Aug 08 22:54:29  daemon  pppd[9175]: PPP LCP UP.
  Aug 08 22:54:30  daemon  pppd[9175]: local  IP address xxx.xxx.xxx.xxx
  Aug 08 22:54:30  daemon  pppd[9175]: remote IP address 195.166.128.239
  Aug 08 22:54:30  daemon  pppd[9175]: primary  DNS address 212.159.6.9
  Aug 08 22:54:30  daemon  pppd[9175]: secondary DNS address 212.159.6.10
  Aug 08 22:54:30  daemon  dnsmasq[92]: using nameserver 212.159.6.10#53
  Aug 08 22:54:30  daemon  dnsmasq[92]: using nameserver 212.159.6.9#53
  Aug 08 22:54:30  daemon  pppd[9175]: Received valid IP address from server.  Connection UP.
  Aug 08 22:54:30  user  syslog: begin: interface: ppp_0_0_38_1 go to up
  Aug 08 22:54:30  daemon  dnsmasq[92]: using nameserver 212.159.6.10#53
  Aug 08 22:54:30  daemon  dnsmasq[92]: using nameserver 212.159.6.9#53
  Aug 08 22:54:30  daemon  UPNPD[9982]: received signal 15, good-bye
Can anyone recommend software to use with the syslog function that Matt_2k34 mentions? 
I was hoping for something similar to my old Netgear DG834N which could be setup to email the logs hourly/daily or if the 7800N had a option to choose what entries are made to the log would have been ideal.
By the way I'm running 1.06b firmware, didn't see any real need to update - if it ain't broke don't fix it.
Steve
Community Veteran
Posts: 4,854
Thanks: 121
Fixes: 24
Registered: 14-07-2009

Re: Can anyone tell me the cause of these disconnects?

Bit of a side issue but what is that message "couldn't increase the MTU to 1500" all about?  What's wrong with 1500?
SteveArnold
Dabbler
Posts: 24
Registered: 12-08-2007

Re: Can anyone tell me the cause of these disconnects?

I've no idea why its trying to increase mtu to 1500, the only mention of it is in the WAN profile under Advanced>Configuration of the 7800N and according to that it's set at 1492.
Steve
Superuser
Superuser
Posts: 6,554
Thanks: 665
Fixes: 50
Registered: 30-07-2007

Re: Can anyone tell me the cause of these disconnects?

Quote
Can anyone recommend software to use with the syslog function that Matt_2k34 mentions? 

You need a syslog server, just google it and you'll see various ones available for free depending on which OS you use.
SteveArnold
Dabbler
Posts: 24
Registered: 12-08-2007

Re: Can anyone tell me the cause of these disconnects?

Thanks MisterW
Steve