Connection Dropping / Line Stats

Ironic Namesake · 6 Jan 2012 at 08:51

We have 2 connections in the office at present, both ADSL - around 7mb each or so. One is with BT, and the other with Fast.co.uk - both on separate phone lines.

Recently the BT connection seems to be dropping every few hours - I've had a look at the router (Draytek 2830N) and the line stats showing as follows :

SNR Margin : 6
Loop Att. : 44

Would this be the cause of an unstable line? I can't see the stats for the other line unfortunately (not sure how to access from the router?)

Locky · 6 Jan 2012 at 09:22

I would say 7mb is about right for a 44 attenuation, it could be dodgy micro filter.

Tealc · 6 Jan 2012 at 09:26

SNR margin of 6dB should be stable enough too. When the connection drops what happens to the SNR? Maybe run routerstatslite to monitor that SNR and see how it fluctuates over time.

Ironic Namesake · 6 Jan 2012 at 10:06

Aha I can see in the log of the router "SNR Margin value lower than MINSNRM, rebooting DSL state machine"

But I can't actually see the SNR margin itself at that point -whilst I've been looking it seems to change between 6 and 7.

Locky · 6 Jan 2012 at 10:17

dial 17070 and do the quiet line test to check for any noise on the line, change filters, check wiring, try a different router if you can, try a filtered face plate. last resort phone ISP.

Ironic Namesake · 8 Jan 2012 at 12:01

Thanks for the tips - will get my colleague to try that nexdt week , I work remotely so is a pain for me as I'm far from the office so need to run my colleague through this!

Actually this has been going on for a few weeks - the whole time I was certain it was the router (Draytek 2820VN) so got that RMAd and just changed to a Draytek 2830N when this thread was started but it seems the issue is still there now

Anyway, I'll probably ask my colleague to pick up a 3G USB dongle and run that as WAN3 so even if the 2 DSL lines are down we at least have that.

I've pulled the logs from the router, not sure if these can help to pinpoint the problem

Jan 8 10:40:13 08/01/2012 10:40:13 WAN1 PPPoE ==> Protocol:LCP(c021) EchoReq Identifier:0x22Magic Number: 0x0 00 00 ## 5 08/01/2012 10:40:13
Jan 8 10:40:14 08/01/2012 10:40:14 WAN2 PPPoE <== Protocol:LCP(c021) EchoReq Identifier:0x0CMagic Number: 0x5dc1 11 74 00 00 00 00 <NULL> Identifier:0x00 <NULL> Identifier:0x00 Unknown: 2d 06 be 56 18 57 Unknown: 38 7f 4e 8f ee 4d Unknown: fe fb ae 1d f7 43 Unknown: 94 eb 00 00 00 00 5 08/01/2012 10:40:14
Jan 8 10:40:14 08/01/2012 10:40:14 WAN2 PPPoE ==> Protocol:LCP(c021) EchoRep Identifier:0x0CMagic Number: 0x0 00 00 00 00 00 00 ## 5 08/01/2012 10:40:14
Jan 8 10:40:21 08/01/2012 10:40:21 WAN1 PPPoE ==> Protocol:LCP(c021) EchoReq Identifier:0x23Magic Number: 0x0 00 00 ## 5 08/01/2012 10:40:21
Jan 8 10:40:25 08/01/2012 10:40:25 WAN2 PPPoE ==> Protocol:LCP(c021) EchoReq Identifier:0x1AMagic Number: 0x0 00 00 ## 5 08/01/2012 10:40:25
Jan 8 10:40:25 08/01/2012 10:40:25 WAN2 PPPoE <== Protocol:LCP(c021) EchoRep Identifier:0x1AMagic Number: 0x5dc1 11 74 Unknown: c0 a8 64 38 02 02 ConfAck Identifier:0x02 Unknown: 4a 20 3c 31 37 34 3e 4a 61 6e 20 20 00 00 00 00 00 00 00 00 f0 a2 dc 75 00 00 00 00 00 00 00 00 Reserved: 5 08/01/2012 10:40:25
Jan 8 10:40:29 08/01/2012 10:40:29 WAN1 PPPoE ==> Protocol:LCP(c021) EchoReq Identifier:0x24Magic Number: 0x0 00 00 ## 5 08/01/2012 10:40:29
Jan 8 10:40:31 08/01/2012 10:40:32 WAN1 PPPoE <== Protocol:LCP(c021) TermReq Identifier:0x01 ## 5 08/01/2012 10:40:31
Jan 8 10:40:31 08/01/2012 10:40:32 PPP Closed : Remote Terminating (PPPoA) 4 08/01/2012 10:40:31
Jan 8 10:40:31 08/01/2012 10:40:32 WAN1 PPPoE ==> Protocol:LCP(c021) TermAck Identifier:0x01 ## 5 08/01/2012 10:40:31
Jan 8 10:40:31 08/01/2012 10:40:32 WAN 1 is down. 5 08/01/2012 10:40:31

Jan 8 09:23:06 08/01/2012 09:23:06 Load_balance 192.168.100.56 --(BAL)--> 8.8.8.8 go WAN1 4 08/01/2012 09:23:06
Jan 8 09:23:08 08/01/2012 09:23:10 WAN1 PPPoE ==> Protocol:LCP(c021) EchoReq Identifier:0x0FMagic Number: 0x0 00 00 ## 5 08/01/2012 09:23:08
Jan 8 09:23:16 08/01/2012 09:23:16 WAN1 PPPoE ==> Protocol:LCP(c021) EchoReq Identifier:0x10Magic Number: 0x0 00 00 ## 5 08/01/2012 09:23:16
Jan 8 09:23:20 08/01/2012 09:23:20 WAN1 PPPoE <== Protocol:LCP(c021) TermReq Identifier:0x01 ## 5 08/01/2012 09:23:20
Jan 8 09:23:20 08/01/2012 09:23:20 PPP Closed : Remote Terminating (PPPoA) 4 08/01/2012 09:23:20
Jan 8 09:23:20 08/01/2012 09:23:20 WAN1 PPPoE ==> Protocol:LCP(c021) TermAck Identifier:0x01 ## 5 08/01/2012 09:23:20
Jan 8 09:23:20 08/01/2012 09:23:20 WAN 1 is down. 5 08/01/2012 09:23:20

Jan 8 06:52:45 08/01/2012 06:52:44 WAN2 PPPoE ==> Protocol:LCP(c021) EchoRep Identifier:0x45Magic Number: 0x0 00 00 00 00 00 00 ## 5 08/01/2012 06:52:45
Jan 8 06:52:47 08/01/2012 06:52:46 WAN1 PPPoE <== Unknown: aa aa 03 00 00 00 08 06 00 13 08 00 00 00 00 08 04 00 00 00 01 01 01 01 ## 5 08/01/2012 06:52:47
Jan 8 06:52:50 08/01/2012 06:52:50 PPP Closed : No Echo Response (PPPoA) 4 08/01/2012 06:52:50
Jan 8 06:52:55 08/01/2012 06:52:54 WAN1 PPPoE <== Unknown: aa aa 03 00 00 00 08 06 00 13 08 00 00 00 00 08 04 00 00 00 01 01 01 01 ## 5 08/01/2012 06:52:55
Jan 8 06:52:55 08/01/2012 06:52:54 WAN2 PPPoE ==> Protocol:LCP(c021) EchoReq Identifier:0x9AMagic Number: 0x0 00 00 ## 5 08/01/2012 06:52:55
Jan 8 06:52:55 08/01/2012 06:52:54 WAN2 PPPoE <== Protocol:LCP(c021) EchoRep Identifier:0x9AMagic Number: 0x5ca0 53 90 Unknown: c0 a8 64 38 02 02 ConfAck Identifier:0x02 MRRU: 15409 Unknown: 36 36 3e 4a 61 6e 20 20 00 00 00 00 00 00 00 00 de 64 d2 3b 00 00 00 00 00 00 00 00 00 00 76 6 5 08/01/2012 06:52:55
Jan 8 06:52:57 08/01/2012 06:52:56 WAN 1 is down. 5 08/01/2012 06:52:57

Jan 8 06:49:02 08/01/2012 06:49:02 WAN1 PPPoE ==> Protocol:LCP(c021) EchoReq Identifier:0xABMagic Number: 0x0 00 00 ## 5 08/01/2012 06:49:02
Jan 8 06:49:07 08/01/2012 06:49:06 WAN2 PPPoE ==> Protocol:LCP(c021) EchoReq Identifier:0x94Magic Number: 0x0 00 00 ## 5 08/01/2012 06:49:07
Jan 8 06:49:07 08/01/2012 06:49:06 WAN2 PPPoE <== Protocol:LCP(c021) EchoRep Identifier:0x94Magic Number: 0x5ca0 53 90 Unknown: c0 a8 64 38 02 02 ConfAck Identifier:0x02 Unknown: 53 23 3c 31 37 34 3e 4a 61 6e 20 20 00 00 00 00 00 00 00 00 5c 58 94 01 00 00 00 00 00 00 00 00 00 00 76 U 5 08/01/2012 06:49:07
Jan 8 06:49:07 08/01/2012 06:49:06 WAN1 PPPoE <== Protocol:LCP(c021) TermReq Identifier:0x01 ## 5 08/01/2012 06:49:07
Jan 8 06:49:07 08/01/2012 06:49:06 PPP Closed : Remote Terminating (PPPoA) 4 08/01/2012 06:49:07
Jan 8 06:49:07 08/01/2012 06:49:06 WAN1 PPPoE ==> Protocol:LCP(c021) TermAck Identifier:0x01 ## 5 08/01/2012 06:49:07
Jan 8 06:49:07 08/01/2012 06:49:06 WAN 1 is down. 5 08/01/2012 06:49:07

Jan 8 03:34:29 08/01/2012 03:34:30 WAN1 PPPoE ==> Protocol:LCP(c021) EchoReq Identifier:0x34Magic Number: 0x0 00 00 ## 5 08/01/2012 03:34:29
Jan 8 03:34:37 08/01/2012 03:34:38 WAN1 PPPoE ==> Protocol:LCP(c021) EchoReq Identifier:0x35Magic Number: 0x0 00 00 ## 5 08/01/2012 03:34:37
Jan 8 03:34:42 08/01/2012 03:34:43 WAN1 PPPoE <== Protocol:LCP(c021) TermReq Identifier:0x01 ## 5 08/01/2012 03:34:42
Jan 8 03:34:42 08/01/2012 03:34:43 PPP Closed : Remote Terminating (PPPoA) 4 08/01/2012 03:34:42
Jan 8 03:34:42 08/01/2012 03:34:43 WAN1 PPPoE ==> Protocol:LCP(c021) TermAck Identifier:0x01 ## 5 08/01/2012 03:34:42
Jan 8 03:34:42 08/01/2012 03:34:43 WAN 1 is down. 5 08/01/2012 03:34:42