[PLUG] cisco 678 DSL latency issues

Russell Evans russell-evans at uswest.net
Tue Aug 5 08:41:02 UTC 2003


Have you compared the Windows setup to the Linux setup? 

ifconfig ethX  vs ipconfig /all

and

netstat -rn	vs I can't remember if windows netstat will give you the route
table or the flags needed if it does.

What do your IP tables look like? 

iptables -L

Using Ethereal to look at the traffic might give you an idea of what the issue
is.  

This is a long shot, but

cat /proc/sys/net/ipv4/ip_local_port_range

If the fisrt number is 1024 do an 

echo 1025-4999 > /proc/sys/net/ipv4/ip_local_port_range

I had a 675, route mode not bridging, doing nat and it would map port 1024 on
the inside ethernet  to port zero on the DSL interface. It would be really odd
if this was an issue with your set up, but its something to try if the normal
issues aren't what is dinking your set up.

Thank you
Russell


On Tue, 5 Aug 2003 07:57:30 -0700, Rogan Creswick said:

> On Mon, Aug 04, 2003 at 11:34:28PM -0700, Russell Evans wrote:
>  > Are you pinging with name or address? If name then try IP address. 
>  
>  It makes no difference.  Pinging my Qwest gateway by ip in Linux
>  results in 2000ms pings, while pinging the same ip in Windows takes
>  only ~60ms. I've also tried two different dns servers on both sides.
>  
>  I get the same results with engr.orst.edu (by name and ip).
>  
>  -Rogan
>  
>  > 
>  > Thank you
>  > Russell
>  > 
>  > 
>  > On Mon, 4 Aug 2003 21:58:51 -0700, Rogan Creswick said:
>  > 
>  > >  I'm running bridged with a cisco 678, 640/256, static ip.  If the
>  > >  cisco is plugged into a windows box everything works great, ping times
>  > >  are arround 90ms.  However, booting into Linux causes ping times to
>  > >  jump to 2000ms, connectivity and bandwith are fine, but latency is
>  > >  horrid (I can download a kernel at 40k/s or better, but it takes
>  > >  2000ms for the xfer to start).
>  > 
>  > 
>  > 
>  > _______________________________________________
>  > PLUG mailing list
>  > PLUG at lists.pdxlinux.org
>  > http://lists.pdxlinux.org/mailman/listinfo/plug
>  
>  _______________________________________________
>  PLUG mailing list
>  PLUG at lists.pdxlinux.org
>  http://lists.pdxlinux.org/mailman/listinfo/plug
>  
>  





More information about the PLUG mailing list