Intermittent Loss of Internet

Every now and again, I'll be browsing the internet and I'll lose internet
connection for about 60 seconds.

The last time this happened I decided to see what was happening during this
time and found when the internet connection was down, my PC was continuously
broadcasting ARP requests to the routers IP, but the router wouldn't reply.
Eventually the router would reply with it's MAC Address, and then the
internet connection would come back up (hard wired connection BTW).

Any idea why it does this, or why the router takes so long to reply?

On 08/03/2011 19:36, Sim wrote:
> Every now and again, I'll be browsing the internet and I'll lose
> internet connection for about 60 seconds.
>
> The last time this happened I decided to see what was happening during
> this time and found when the internet connection was down, my PC was
> continuously broadcasting ARP requests to the routers IP, but the router
> wouldn't reply. Eventually the router would reply with it's MAC Address,
> and then the internet connection would come back up (hard wired
> connection BTW).
>
> Any idea why it does this, or why the router takes so long to reply?
>
>

Have you checked the router's internal logs?

It sounds as if it's crashing and rebooting.

Andy

Andy Champ wrote:
> On 08/03/2011 19:36, Sim wrote:
>> Every now and again, I'll be browsing the internet and I'll lose
>> internet connection for about 60 seconds.
>>
>> The last time this happened I decided to see what was happening during
>> this time and found when the internet connection was down, my PC was
>> continuously broadcasting ARP requests to the routers IP, but the router
>> wouldn't reply. Eventually the router would reply with it's MAC Address,
>> and then the internet connection would come back up (hard wired
>> connection BTW).
>>
>> Any idea why it does this, or why the router takes so long to reply?
>>
>>
>
> Have you checked the router's internal logs?
>
> It sounds as if it's crashing and rebooting.
>

More like its resynching.

I'm having a purple patch for that sort of stuff right now.

Seeing massive 6-8dB noise spikes knocking the bastard off every half
hour or so.


> Andy

"The Natural Philosopher" <(E-Mail Removed)> wrote in message
news:il6pk4$8ll$(E-Mail Removed)...
> Andy Champ wrote:
>> On 08/03/2011 19:36, Sim wrote:
>>> Every now and again, I'll be browsing the internet and I'll lose
>>> internet connection for about 60 seconds.
>>>
>>> The last time this happened I decided to see what was happening during
>>> this time and found when the internet connection was down, my PC was
>>> continuously broadcasting ARP requests to the routers IP, but the router
>>> wouldn't reply. Eventually the router would reply with it's MAC Address,
>>> and then the internet connection would come back up (hard wired
>>> connection BTW).
>>>
>>> Any idea why it does this, or why the router takes so long to reply?
>>>
>>>
>>
>> Have you checked the router's internal logs?
>>
>> It sounds as if it's crashing and rebooting.
>>
>
> More like its resynching.

There's no good reason why an ADSL re-sync should break the ethernet
communication between the PC and the router. In fact, if you were
monitoring the router's status page you should see the line lose sync and
re-negotiate. Any sort of noise spike will cause this - it can't be
avoided. Lightning during thunderstorms is a classic cause.

Very occasionally some routers will reboot in order to accommodate the ADSL
re-sync.

I suggest you leave a spare computer monitoring the router's status page, to
see whether every ADSL re-sync causes the router to reboot. If so, try a
different router.

With the exception of during a thunderstorm your ADSL service shouldn't
re-sync more than about once every 24 hours. If it does a good ISP will
help you resolve the problem by getting BT Openreach to correct any line
problems. This may take a couple of months, since Openreach don't appear to
have anybody with the necessary skill to resolve such problems.

--
Graham J

"The Natural Philosopher" <(E-Mail Removed)> wrote in message
news:il6pk4$8ll$(E-Mail Removed)...
>>> Every now and again, I'll be browsing the internet and I'll lose
>>> internet connection for about 60 seconds.
>>>
>>> The last time this happened I decided to see what was happening during
>>> this time and found when the internet connection was down, my PC was
>>> continuously broadcasting ARP requests to the routers IP, but the router
>>> wouldn't reply. Eventually the router would reply with it's MAC Address,
>>> and then the internet connection would come back up (hard wired
>>> connection BTW).
>>>
>>> Any idea why it does this, or why the router takes so long to reply?
>>>
>>>
>>
>> Have you checked the router's internal logs?
>>
>> It sounds as if it's crashing and rebooting.
>>
>
> More like its resynching.
>
> I'm having a purple patch for that sort of stuff right now.
>
> Seeing massive 6-8dB noise spikes knocking the bastard off every half hour
> or so.
>
>
>> Andy



What do you mean by noise spikes? I see interference (sequential spikes),
but only when another computer is running at the same time.

"Sim" <(E-Mail Removed)> wrote in message news:il60di$p22$(E-Mail Removed)...
> Every now and again, I'll be browsing the internet and I'll lose internet
> connection for about 60 seconds.
>
> The last time this happened I decided to see what was happening during
> this time and found when the internet connection was down, my PC was
> continuously broadcasting ARP requests to the routers IP, but the router
> wouldn't reply. Eventually the router would reply with it's MAC Address,
> and then the internet connection would come back up (hard wired connection
> BTW).
>
> Any idea why it does this, or why the router takes so long to reply?

Maybe you own a Netgear DGN2000 and one of the ports is failing.


--
Michael Chare

Sim wrote:
> "The Natural Philosopher" <(E-Mail Removed)> wrote in message
> news:il6pk4$8ll$(E-Mail Removed)...
>>>> Every now and again, I'll be browsing the internet and I'll lose
>>>> internet connection for about 60 seconds.
>>>>
>>>> The last time this happened I decided to see what was happening during
>>>> this time and found when the internet connection was down, my PC was
>>>> continuously broadcasting ARP requests to the routers IP, but the
>>>> router
>>>> wouldn't reply. Eventually the router would reply with it's MAC
>>>> Address,
>>>> and then the internet connection would come back up (hard wired
>>>> connection BTW).
>>>>
>>>> Any idea why it does this, or why the router takes so long to reply?
>>>>
>>>>
>>>
>>> Have you checked the router's internal logs?
>>>
>>> It sounds as if it's crashing and rebooting.
>>>
>>
>> More like its resynching.
>>
>> I'm having a purple patch for that sort of stuff right now.
>>
>> Seeing massive 6-8dB noise spikes knocking the bastard off every half
>> hour or so.
>>
>>
>>> Andy
>
>
>
> What do you mean by noise spikes? I see interference (sequential
> spikes), but only when another computer is running at the same time.
>
>
I mean my SNR drops 3-5dB and the bloody thing then resyncs: Often at a
HIGHER sync.

Engineer coming again tommorow.

On Fri, 11 Mar 2011 02:56:26 +0000, The Natural Philosopher made love to
the words:

> Sim wrote:
>> "The Natural Philosopher" <(E-Mail Removed)> wrote in message
>> news:il6pk4$8ll$(E-Mail Removed)...
>>>>> Every now and again, I'll be browsing the internet and I'll lose
>>>>> internet connection for about 60 seconds.
>>>>>
>>>>> The last time this happened I decided to see what was happening
>>>>> during this time and found when the internet connection was down, my
>>>>> PC was continuously broadcasting ARP requests to the routers IP, but
>>>>> the router
>>>>> wouldn't reply. Eventually the router would reply with it's MAC
>>>>> Address,
>>>>> and then the internet connection would come back up (hard wired
>>>>> connection BTW).
>>>>>
>>>>> Any idea why it does this, or why the router takes so long to reply?
>>>>>
>>>>>
>>>>>
>>>> Have you checked the router's internal logs?
>>>>
>>>> It sounds as if it's crashing and rebooting.
>>>>
>>>>
>>> More like its resynching.
>>>
>>> I'm having a purple patch for that sort of stuff right now.
>>>
>>> Seeing massive 6-8dB noise spikes knocking the bastard off every half
>>> hour or so.
>>>
>>>
>>>> Andy
>>
>>
>>
>> What do you mean by noise spikes? I see interference (sequential
>> spikes), but only when another computer is running at the same time.
>>
>>
> I mean my SNR drops 3-5dB and the bloody thing then resyncs: Often at a
> HIGHER sync.
>
> Engineer coming again tommorow.

But you're with a shit ISP known for this crap. IDNET - twats of the
internet.....

Sultan of Usenet wrote:
> On Fri, 11 Mar 2011 02:56:26 +0000, The Natural Philosopher made love to
> the words:
>
>> Sim wrote:
>>> "The Natural Philosopher" <(E-Mail Removed)> wrote in message
>>> news:il6pk4$8ll$(E-Mail Removed)...
>>>>>> Every now and again, I'll be browsing the internet and I'll lose
>>>>>> internet connection for about 60 seconds.
>>>>>>
>>>>>> The last time this happened I decided to see what was happening
>>>>>> during this time and found when the internet connection was down, my
>>>>>> PC was continuously broadcasting ARP requests to the routers IP, but
>>>>>> the router
>>>>>> wouldn't reply. Eventually the router would reply with it's MAC
>>>>>> Address,
>>>>>> and then the internet connection would come back up (hard wired
>>>>>> connection BTW).
>>>>>>
>>>>>> Any idea why it does this, or why the router takes so long to reply?
>>>>>>
>>>>>>
>>>>>>
>>>>> Have you checked the router's internal logs?
>>>>>
>>>>> It sounds as if it's crashing and rebooting.
>>>>>
>>>>>
>>>> More like its resynching.
>>>>
>>>> I'm having a purple patch for that sort of stuff right now.
>>>>
>>>> Seeing massive 6-8dB noise spikes knocking the bastard off every half
>>>> hour or so.
>>>>
>>>>
>>>>> Andy
>>>
>>>
>>> What do you mean by noise spikes? I see interference (sequential
>>> spikes), but only when another computer is running at the same time.
>>>
>>>
>> I mean my SNR drops 3-5dB and the bloody thing then resyncs: Often at a
>> HIGHER sync.
>>
>> Engineer coming again tommorow.
>
> But you're with a shit ISP known for this crap. IDNET - twats of the
> internet.....

IDNET have been brilliant. This is a bitch of a problem.Its intermittent
noise on a BT line.. Not much that IDNET can do except pass it along.

BT Openreach Engineer came, rerouted my line and got me a 6db increase
in SNR!!! I knew the coffee would work.

However, it still seems a bit unstable. Much FASTYER, but still not
holding a steady synch. Only things not changed are DSLAM card and
router.. we will see.

At any rate even if the noise margin tracks back to 15dB plus, I should
still have decent speed,.

On 11/03/11 13:06, The Natural Philosopher wrote:

>> But you're with a shit ISP known for this crap. IDNET - twats of the
>> internet.....
>
> IDNET have been brilliant. This is a bitch of a problem.Its intermittent
> noise on a BT line.. Not much that IDNET can do except pass it along.
>
> BT Openreach Engineer came, rerouted my line and got me a 6db increase
> in SNR!!! I knew the coffee would work.

In the last two months BT have given us a new dropline from the pole, a
new line from the pole to the cabinet, a new line from the cabinet to
the exchange (twice) and new DSLAM. Speed has gone up from less than 1Mb
to a stable 13Mb. Our ISP is Zen.

There were two faults. One was the termination at the top of the pole
getting wet and the other was a noisy line from cabinet to exchange. It
hasn't rained since BT went away so we still can't tell whether both
faults are permanently fixed.


--
Bernard Peek
(E-Mail Removed)