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Vigor 2800 error handling



 
 
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  #1  
Old January 8th 14, 10:53 PM posted to uk.telecom.broadband
Graham J
external usenet poster
 
Posts: 620
Default Vigor 2800 error handling

Vigor 2800 router, sync at about 3 mbits/sec, 12dB SNR margin 48.5dB
loop attenuation.

Works fine for anything from one hour to several days. Uncorrected and
corrected error counts increase slowly - 2 or 3 errors per minute.

At some random time, without any known provocation, error rate (either
corrected or uncorrected, seems to depend on interleave setting)
increases at about 3,000 errors per minute.

This can be stopped by getting the ISP to run a copper line test, which
has the effect of breaking the ADSL connection for a few seconds, and
the router re-synchronises OK. After the re-sync the error rate is
again virtually zero.

Provided interleave is on, there's no packet loss, but with interleave
off packet loss is significant.

This is repeatable with several Vigor 2800 routers, and with different
microfilters, either faceplate type or wire ended type plugged into test
socket; nothing else connected to the phone line. Latest firmware.

So I don't believe the noise causing the error count is continuously
present, otherwise after the router re-syncs it would continue to show a
noticeable error rate.

I suspect that having seen some noise and started counting errors, the
router thinks every packet is in error and continues to show an
increasing count until the re-sync is invoked.

Has anybody else seen anything similar?

--
Graham J
  #2  
Old January 8th 14, 11:30 PM posted to uk.telecom.broadband
Mike Tomlinson
external usenet poster
 
Posts: 285
Default Vigor 2800 error handling

En el artículo , Graham J
[email protected]? escribió:

This can be stopped by getting the ISP to run a copper line test, which
has the effect of breaking the ADSL connection for a few seconds, and
the router re-synchronises OK. After the re-sync the error rate is
again virtually zero.


This is usually a dodgy connection somewhere along the line. Can also
be fixed temporarily by ringing the phone, the ringing current improves
the connection. If you attach the max REN (4), it'll increase the
ringing current which may or may not help.

Any noise on quiet line test?

--
(\_/)
(='.'=)
(")_(")
  #3  
Old January 9th 14, 08:33 AM posted to uk.telecom.broadband
Graham J
external usenet poster
 
Posts: 620
Default Vigor 2800 error handling

Mike Tomlinson wrote:
En el artículo , Graham J
[email protected]? escribió:

This can be stopped by getting the ISP to run a copper line test, which
has the effect of breaking the ADSL connection for a few seconds, and
the router re-synchronises OK. After the re-sync the error rate is
again virtually zero.


This is usually a dodgy connection somewhere along the line. Can also
be fixed temporarily by ringing the phone, the ringing current improves
the connection. If you attach the max REN (4), it'll increase the
ringing current which may or may not help.

Any noise on quiet line test?


Not since BT mended the line on 18 October.

--
Graham J


  #4  
Old January 9th 14, 06:57 PM posted to uk.telecom.broadband
Peter Crosland
external usenet poster
 
Posts: 1,463
Default Vigor 2800 error handling

On 08/01/2014 22:53, Graham J wrote:
Vigor 2800 router, sync at about 3 mbits/sec, 12dB SNR margin 48.5dB
loop attenuation.

Works fine for anything from one hour to several days. Uncorrected and
corrected error counts increase slowly - 2 or 3 errors per minute.

At some random time, without any known provocation, error rate (either
corrected or uncorrected, seems to depend on interleave setting)
increases at about 3,000 errors per minute.

This can be stopped by getting the ISP to run a copper line test, which
has the effect of breaking the ADSL connection for a few seconds, and
the router re-synchronises OK. After the re-sync the error rate is
again virtually zero.

Provided interleave is on, there's no packet loss, but with interleave
off packet loss is significant.

This is repeatable with several Vigor 2800 routers, and with different
microfilters, either faceplate type or wire ended type plugged into test
socket; nothing else connected to the phone line. Latest firmware.

So I don't believe the noise causing the error count is continuously
present, otherwise after the router re-syncs it would continue to show a
noticeable error rate.

I suspect that having seen some noise and started counting errors, the
router thinks every packet is in error and continues to show an
increasing count until the re-sync is invoked.

Has anybody else seen anything similar?


My experience with the 2800 was similar. It was very poor at dealing
with a noisy line. Interleaving will greatly reduce the errors because
it enables error correction. I would try getting a 2Wire 2700 badged BT
2700HGV from eBay. These are cheap and unrivaled for dealing with a
noisy line. The drawback is that they don't have fast ethernet or
wireless ports.


--
Peter Crosland
  #5  
Old January 10th 14, 02:10 PM posted to uk.telecom.broadband
Graham.
external usenet poster
 
Posts: 876
Default Vigor 2800 error handling

On Thu, 09 Jan 2014 18:57:36 +0000, Peter Crosland
wrote:

On 08/01/2014 22:53, Graham J wrote:
Vigor 2800 router, sync at about 3 mbits/sec, 12dB SNR margin 48.5dB
loop attenuation.

Works fine for anything from one hour to several days. Uncorrected and
corrected error counts increase slowly - 2 or 3 errors per minute.

At some random time, without any known provocation, error rate (either
corrected or uncorrected, seems to depend on interleave setting)
increases at about 3,000 errors per minute.

This can be stopped by getting the ISP to run a copper line test, which
has the effect of breaking the ADSL connection for a few seconds, and
the router re-synchronises OK. After the re-sync the error rate is
again virtually zero.

Provided interleave is on, there's no packet loss, but with interleave
off packet loss is significant.

This is repeatable with several Vigor 2800 routers, and with different
microfilters, either faceplate type or wire ended type plugged into test
socket; nothing else connected to the phone line. Latest firmware.

So I don't believe the noise causing the error count is continuously
present, otherwise after the router re-syncs it would continue to show a
noticeable error rate.

I suspect that having seen some noise and started counting errors, the
router thinks every packet is in error and continues to show an
increasing count until the re-sync is invoked.

Has anybody else seen anything similar?


My experience with the 2800 was similar. It was very poor at dealing
with a noisy line. Interleaving will greatly reduce the errors because
it enables error correction. I would try getting a 2Wire 2700 badged BT
2700HGV from eBay. These are cheap and unrivaled for dealing with a
noisy line. The drawback is that they don't have fast ethernet or
wireless ports.


Don't they both have "fast" ethernet (10/100Mb/s)?





--
Graham.


%Profound_observation%
  #6  
Old January 10th 14, 04:36 PM posted to uk.telecom.broadband
Peter Crosland
external usenet poster
 
Posts: 1,463
Default Vigor 2800 error handling

On 10/01/2014 14:10, Graham. wrote:
On Thu, 09 Jan 2014 18:57:36 +0000, Peter Crosland
wrote:

On 08/01/2014 22:53, Graham J wrote:
Vigor 2800 router, sync at about 3 mbits/sec, 12dB SNR margin 48.5dB
loop attenuation.

Works fine for anything from one hour to several days. Uncorrected and
corrected error counts increase slowly - 2 or 3 errors per minute.

At some random time, without any known provocation, error rate (either
corrected or uncorrected, seems to depend on interleave setting)
increases at about 3,000 errors per minute.

This can be stopped by getting the ISP to run a copper line test, which
has the effect of breaking the ADSL connection for a few seconds, and
the router re-synchronises OK. After the re-sync the error rate is
again virtually zero.

Provided interleave is on, there's no packet loss, but with interleave
off packet loss is significant.

This is repeatable with several Vigor 2800 routers, and with different
microfilters, either faceplate type or wire ended type plugged into test
socket; nothing else connected to the phone line. Latest firmware.

So I don't believe the noise causing the error count is continuously
present, otherwise after the router re-syncs it would continue to show a
noticeable error rate.

I suspect that having seen some noise and started counting errors, the
router thinks every packet is in error and continues to show an
increasing count until the re-sync is invoked.

Has anybody else seen anything similar?


My experience with the 2800 was similar. It was very poor at dealing
with a noisy line. Interleaving will greatly reduce the errors because
it enables error correction. I would try getting a 2Wire 2700 badged BT
2700HGV from eBay. These are cheap and unrivaled for dealing with a
noisy line. The drawback is that they don't have fast ethernet or
wireless ports.


Don't they both have "fast" ethernet (10/100Mb/s)?


They have 100MB ethernet ports. The wireless is not "N"


--
Peter Crosland
  #7  
Old January 10th 14, 06:05 PM posted to uk.telecom.broadband
Graham.
external usenet poster
 
Posts: 876
Default Vigor 2800 error handling

On Fri, 10 Jan 2014 16:36:09 +0000, Peter Crosland
wrote:

On 10/01/2014 14:10, Graham. wrote:
On Thu, 09 Jan 2014 18:57:36 +0000, Peter Crosland
wrote:

On 08/01/2014 22:53, Graham J wrote:
Vigor 2800 router, sync at about 3 mbits/sec, 12dB SNR margin 48.5dB
loop attenuation.

Works fine for anything from one hour to several days. Uncorrected and
corrected error counts increase slowly - 2 or 3 errors per minute.

At some random time, without any known provocation, error rate (either
corrected or uncorrected, seems to depend on interleave setting)
increases at about 3,000 errors per minute.

This can be stopped by getting the ISP to run a copper line test, which
has the effect of breaking the ADSL connection for a few seconds, and
the router re-synchronises OK. After the re-sync the error rate is
again virtually zero.

Provided interleave is on, there's no packet loss, but with interleave
off packet loss is significant.

This is repeatable with several Vigor 2800 routers, and with different
microfilters, either faceplate type or wire ended type plugged into test
socket; nothing else connected to the phone line. Latest firmware.

So I don't believe the noise causing the error count is continuously
present, otherwise after the router re-syncs it would continue to show a
noticeable error rate.

I suspect that having seen some noise and started counting errors, the
router thinks every packet is in error and continues to show an
increasing count until the re-sync is invoked.

Has anybody else seen anything similar?

My experience with the 2800 was similar. It was very poor at dealing
with a noisy line. Interleaving will greatly reduce the errors because
it enables error correction. I would try getting a 2Wire 2700 badged BT
2700HGV from eBay. These are cheap and unrivaled for dealing with a
noisy line. The drawback is that they don't have fast ethernet or
wireless ports.


Don't they both have "fast" ethernet (10/100Mb/s)?


They have 100MB ethernet ports. The wireless is not "N"


That would have made sense if or = on ;-)


--
Graham.


%Profound_observation%
 




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