Re: [Hampshire] ADSL unstable line

On 29/04/07, Damian Lajos Brasher <lug@???> wrote:
> Hi List
>
> Has anyone experienced a situation where an ADSL line has become
> unstable after a speed increase - say from down/up 1024/256 to roughly
> 8000/800.
>
> The provider is Demon and the router is a Belkin. The error from the
> router is 'LCP negotiation'. This can continue for about 15 minutes
> before the line re-connects. There is a similar problem when we use a
> Netgear DG###### instead but slightly worse as the router never
> re-connects even when we have 'connect on demand' set as we have with
> the Belkin. The Netgear requires a cold reboot.
>
> The owner of the line has contacted Demon to ask them to reduce the
> speed back to pre-throttled line speed. They have not been able to do
> this yet, the line is still unstable. The worst times are during the
> weekdays when the exchange is busy and we are not 100% sure but rainy
> days are suspect.
>
> I have advised a purchase of a new modem / router but the equipment will
> not be available until later in May and we want to be sure before
> spending cash.
>
> We are 99.99% certain this is not the caused by internal services - I
> want to capture a tcpdump from the main server as the router disconnects
> just in case.
>
> Has anyone managed to arrange with an ISP a thorough line check? and if
> so how? (the normal ticket has been raised but the response is watery so
> far and passed to BT or lost in a support loop for weeks now).
>
> TIA
>
> Damian B
>

Take a look at the ATM stats on the router.
Do you have a lot of CRC errors?
Also, report the signal/noise level reported my the router.