network speed question

Gregory Nowak greg at romuald.net.eu.org
Thu Jul 21 12:17:48 EDT 2005


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One more thing I could add here is that if any of the machines are
old, and thus have a slow cpu by today's standards, that could be
effecting the connection speed as well, since that does depend on the
cpu speed somewhat if I'm not mistaken.

Greg


On Thu, Jul 21, 2005 at 09:06:10AM -0600, Joseph C. Lininger wrote:
> I'll be honest with you, generally if things are not working right it is 
> not a question of tcp settings. I suggested it only because I was saying 
> I'd be interested in knowing if making them identical in Windows and 
> Linux made the transfer speeds in both operating systems equal. See each 
> uses different default settings. If you are having a speed issue with a 
> direct connection between two computers, you will want to investigate 
> the tcp settings, but also the following things.
> 
> 1. The routing tables on both ends, especially if one of the machines 
> has more than one ethernet interface. Check that packets are not being 
> accidentally routed to the wrong interface.
> 2. Are transfers in either direction effected, or only in one direction?
> 3. Do you imploy anything like iptables that may be either blocking or 
> redirecting some of the packets?
> 4. Is there a possibility that there is something wrong with the cable 
> you are using?
> 5. Finally, does the Linux machine (the server, the one with internet 
> access) have access to DNS or is there an entry in /etc/hosts for the ip 
> address of the laptop? This can cause things to slow down because things 
> that you wouldn't expect will issue a query for a host name. If the 
> laptop runs Linux, it probably wouldn't hurt to list the machine you are 
> connecting to in /etc/hosts too.
> 
> -- 
> It's not one damn thing after another, it's the same damn thing over and
> over. (History repeats itself)
> Joseph C. Lininger
> jbahm at pcdesk.net
> Verification: 5eab38a77ac40416e075be8f50607ff7
> 

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