On 04/14/2014 12:56 PM, Gareth France wrote:
I was hoping someone might have some ideas as to what is up with my
internet connection recently. I am running a 3G connection via a Huawei
E5220 wireless hotspot. It's a fairly new device and for most of the
time I have had it pages refuse to load, chromium just says 'resolving
host' for a few minutes. Several page reloads later the page will load
and internet will work for 5 minutes or so then the process repeats.
This also affects streaming video and using my phone to remote control
VLC over the hotspot.
However accessing the internet on my phone via the hotspot works fine.
They have just sent me out a replacement and it's doing the same thing.
I'm running Ubuntu 14.04 which I upgraded to a couple of weeks ago. The
connection did work fine at first and I can't pin down exactly when they
symptoms started but I do wonder if it may be a quirk of 14.04. I also
experienced a persistent 'resolving host' issue on another network via
wireless the other day which required a reboot to solve.
Any thoughts would be appreciated.
My first thought would be to check the MTU on the connection. It's easy
to do this with ping from the command line. Do:
ping -M do -s 1500 google.com
and examine the output to see if you get fragmentation. If so, you may
need to find a value lower than 1500 which avoids the fragmentation.
This is all supposed to happen automatically, but seems to have gone a
bit awry recently. I have to use 1432 manually set on my Ubuntu machines
as my router doesn't support a manual MTU setting. You can try out a
setting to see if things improve with the command:
sudo ip link set eth0 mtu 1432
You may need to substitute something else for eth0 depending on the
device name for your network interface. If that solves your problem, you
can make it permanent.
--
JimP
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