Re: problems with BT broadband connection
- From: Nicholas Thomas <ku.gro.snagap-erihskroy@xxxxxxxxxxxxxx>
- Date: Tue, 20 Jun 2006 21:00:06 +0100
David Horne, _the_ chancellor of the duchy of besses o' th' barn and
prestwich tesco 24h offy wrote:
I've noticed increasing, if occasional problems, when using broadband.
Pages which I use regularly (e.g. bbc news website) will often be hard
to load, 'looking up' for a several moments. I find that when I get a
message of 'not found' I can almost immediately connect just by
reloading. Similarly, ads that use ad servers are really frustrating at
times. I'm using Mac OS X 10.4.6, a belkin wireless point attached to a
zoom adsl modem. As the hardware didn't seem to present a problem, I'm
wondering if this is a recent problem in BT's service, or maybe even
something in my settings. For example, I never seem to have problems
with nntp or pop mail access, unless those servers have outages
themselves, such as occasionally happens with fastmail.
Anything I should check, or tweak, in my settings?
TIA
Probably a DNS problem of some kind.
Given what you've said, speculation could point to DNS (UDP) packets
being lost over a dodgy wireless connection. Since there's no flow
control (unlike TCP, eg. nntp/pop), your PC would end up waiting a while
before re-sending the packet, which could cause the delays you're
describing.
Diagnostics - try doing a flood test from your PC to your wireless
router (that is, ping it relentlessly for a minute or so - in linux, for
router 192.168.0.1, I'd use the command 'ping -i 0.1 192.168.0.1' - YMMV
of course. Under windows, the /f switch might have a similar effect to
-i, but check the documentation), and see how many packets you drop.
If it is the problem, then you've got two solutions that immediately
spring to mind - first, improve the connection to your wireless router;
second, install a caching-only DNS server on your home PC, and set your
PC's LAN interface to use 127.0.0.1 as your primary DNS server.
Of course, it could also be a variety of other things...
xF,
....Nick
.
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