ADSL 'Hanging' ? Help!

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MKH9130

Original Poster:

4,121 posts

208 months

Saturday 1st December 2007
quotequote all
Hi.

I remotely manage a couple of networks for family. One of these has a single 512k broadband connection provided by Tesco.net (via Virgin Media, who were NTL before).

This household is in a remote location, where the vast majority of residents cannot get broadband. This house has five BT lines going into it, only one of which will sync for broadband. The router stats are - line attenuation of 63dB (Possibly higher, as I understand routers cannot display more?) with an SNR Margin of 13-14 normally.

Every so often, the DSL connection simply 'Hangs'. It does not disconnect, but it won't allow any incoming or outgoing traffic including ping requests. (I cannot access the router remotely when it does this). This used to happen every other week or so, but now happens nearly every day - sometimes more than once a day. When it does this, turning the power off and on to the router makes the DSL line connect again successfully and all is well for another day or so.

If, when it hangs, you log into the router from inside the network, the SNR Margin shows as 10-11 (!). Resetting the DSL link from the inside the router produces a very rubbish DSL link that has a crap latency.

Any idea what is causing this? It happens at random intervals through the day with no pattern.

The router is a D-Link DSL-G624T. It is plugged directly into the master socket (via filter) as provided by BT, and this line is used for data only. Nothing else is connected to it.

There is one user who really does 'hog' the bandwidth, downloading anything up to 1-2Gb per day (Youtube videos on the whole), but the package is Unlimited and there have never been any Emails sent about going over the fair usage allowance and I'm sure the ISP wouldn't hang the link, only limit it!

This is really starting to bug me now, let alone the people at the house who have to reset the router daily!



trooperiziz

9,456 posts

252 months

Saturday 1st December 2007
quotequote all
Anybody using any peer 2 peer apps?

Usually when a router hangs it's because it has run out of memory or overheated. Peer 2 peer apps are notorious for opening hundreds of concurrent connections, if your router likes to leave them open it will will soon run out of memory.

First option is to check for any updated firmware for the router, second is to check for any peer 2 peer apps and limit their total connections to around 200 or so, thirdly is to make sure the router has good enough ventilation and isn't getting too hot...

MKH9130

Original Poster:

4,121 posts

208 months

Sunday 2nd December 2007
quotequote all
trooperiziz said:
Anybody using any peer 2 peer apps?

Usually when a router hangs it's because it has run out of memory or overheated. Peer 2 peer apps are notorious for opening hundreds of concurrent connections, if your router likes to leave them open it will will soon run out of memory.

First option is to check for any updated firmware for the router, second is to check for any peer 2 peer apps and limit their total connections to around 200 or so, thirdly is to make sure the router has good enough ventilation and isn't getting too hot...
Hi.

The user in question has something called Veoh TV, which I understand is P2P ?

Will have a look at the settings on this. The router does get quite hot, but I have since relocated it to the non-heated garage with plenty of ventilation!

I can still log into the router when the DSL line has hung (only from inside the network) - wouldn't a router hanging just freeze the box completely, rather than just the DSL link?

VictorMeldrew

8,293 posts

277 months

Sunday 2nd December 2007
quotequote all
Totally agree on the router getting hot - I always install mine vertically with plenty of airflow these days, having been caught out by overheating routers in the past. If they have to go horizontal I will elevate them on a wire rack (upturned wire in-trays are great for this!).