Marty wrote:
A. Ben Hmeda wrote:
I have an Internet router for sharing cable Internet connection. 3 PCs
plugged into this router, class C network, I think. All with static
IPs 192.168.1.2,3 and 4. Gateway (router) is 192.168.1.1 DNS is my
ISP's 64.71.255.198 I am using 100Mb Ethernet and 10/100Mb router. My
Internet connection speed is only 1Mbps (max) My internet download
speeds range from 90kB/s to 114kB/s. Under Ubuntu, they crawl at
15kB/s to 25kB/s max! under static IP setup or dhcp setup.
I forgot to mention before, that details about your NIC and kernel may
also be relevant. See below.
2.6.15-28-k7 #1 SMP PREEMPT Thu Feb 1 16:36:09 UTC 2007 i686 GNU/Linux
The machine with the problem is my AMDSMP. I have had absolutely no
problem with network speed (internal and external) until I installed
Dapper. As it is now, it is a dual booting machine (win2k and ubuntu)
The point I was trying to make is to determine whether the problem (with
Ubuntu) exists in the LAN traffic as well as in the internet connection
traffic. Whether the slowdown also occurs in LAN traffic, or
alternatively, only with internet traffic, this information would tend
to narrow down the problem a great deal and could help point to the cause.
It exists on both lan and wan. I tested using file transfer (smb)
between my machine and kidpc (win2k) and found that by re-issuing the
command /etc/init.d/networking restart, the transfer speed within LAN
almost doubled.
Previously, it ran Debian Sarge, Fedora Core 4 and 5, alongside win2k
without any problems. Presently, my network speed is fine under
windows, was fine under Sarge, Fedora 4 and 5 on the same machine,
except for ubuntu.
Although that makes physical layer issues less likely, it doesn't
eliminate them. The only way to completely eliminate physical layer
issues is to swap cables, router ports, and (lastly) NICs. These kinds
of tests should probably be the first things to try because they are so
easy to do, although they have a very low probability of being the cause.
As I was poking around, trying to figure this out, I noticed that
network speed is drastically improved, back to 90kB to 114kB under
Ubuntu when, in GNOME, I open the System>>Administration>>Networking
and just click OK, without actually changing anything! This makes no
sense to me and I have no explanation for it, it certainly does not
change the content in my /etc/network/interfaces but I was able to
duplicate the steps with same results every time. Is the
System>>Administration>>Networking>>OK the same as
/etc/init.d/networking restart?
I don't know, but you could find out by executing the command on the CLI
as root. If it fixes the problem then it could be a NIC driver
initialization issue. Then you should start experimenting with
different drivers and NICs to narrow down the cause. Otherwise we may
not be able to exclude the "ghosts" hypothesis proposed by another list
member. :O
Re-issuing the command fixes the problem, I will live with it as I have
no more PCI slots left to install another NIC.
Thank you all so much for the help.
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