On 30/12/2010 12:48 AM, Michael Chesterton wrote:
Hello
The IPv6 issues where mainly with firefox, and the symptoms were different
to yours, mainly a page would take ages before it started to load, then it
would load fast.
Some issues that can cause problems are MTU
G'day Michael, thanks for the prompt response.
Interesting point about the MTU, I tweaked this awhile ago when Bigpond
changed some settings which set the MTU to 576, which absolutely broke
my CSS experience, I fixed this by editing /etc/dhcp3/dhclient.conf and
removing the interface-mtu from the request, this left the MTU at 1500
which fixed my CSS.
/etc/dhcp3/dhclient.conf
request subnet-mask, broadcast-address, time-offset, routers,
domain-name, domain-name-servers, host-name,
netbios-name-servers, netbios-scope, interface-mtu;
I don't think it's one of those, but they are easy to test.
Run ifconfig and look at the traffic stats on eth0 (or whatever your network
interface is), see if there are any errors or collisions.
nothing seems out of the ordinary here?
ifconfig eth1
eth1 Link encap:Ethernet HWaddr XX
inet addr:XX Bcast:255.255.255.255 Mask:255.255.252.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:179886 errors:0 dropped:0 overruns:0 frame:0
TX packets:87923 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:122278825 (116.6 MiB) TX bytes:5887687 (5.6 MiB)
and duplex mismatch.
ethtool eth1
Settings for eth1:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: g
Wake-on: g
Current message level: 0x00000007 (7)
Link detected: yes
run ifconfig eth0 mtu 1000 and then try a download. ifconfig eth0 mtu 1500
to reset (if it was 1500 to begin with)
Ok I played with the MTU setting and found the speed drops when the MTU
is lowered to 1000 or the bigpond default of 576.
I checked this using wget on a iso file from mirror aarnet, goes from
~3mb/sec on the MTU 1500 to ~500kbs/sec on MTU 576
It could be some weird tcp setting, have a look at /etc/sysctl.conf to see
if kernel parameters are being set. If you're up for it, have a look
at /proc/sys/net/ipv4 and compare between knoppix and debian to see if there
are any differences. There's lots of files though, you can cat them to see
I will look into this tonight, you are right there are heaps of files,
any clues where to start?
the settings.
Lastly, run
tcpdump -nvvvi eth0 -s0 -c100>/tmp/tcpdump.out
then do a download, maybe use a pastebin to upload the data and link to it
in a follow up post rather than pasting it into a message to the list.
I will also do this asap.
Thanks for your help.
Gerard
--
SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/
Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
