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Weirdness on our net

N

Nutz

Senior member
We just finished tweaking our patch pannel and I wanted to do some testing. The results confused the hell out of me.

Pushing a 34 MB file to our file server took 24 seconds. Pulling that same file from the server to my desktop took almost a full 2 minutes. Both machines have 100Mbps connections and are on the same Catalyst 2950. No other users were hitting the file server at the time of testing.

What gives? Is it packet loss? Some sort of networking randomness I should expect? What do you guys think?

 
Do you have a speed/duplex mismatch problem with one of your hub uplinks or server ports? Always hard-set those kinds of things to the maximum the device can handle. Auto is baaad for anything but workstations.

- G
 
Another golden rule about speed/duplex. ALWAYS set both sides of a link the same - ie force both sides or auto both sides. but do not force one side and let the other side autonegotiate. You'll be left with one side autonegging to half while the other side is forced to full. VERY, very slow.

sure sign of duplex mismatches are FCS and Alignment errors on the switch or NIC. As an FYI I always leave endstations configured for auto. Data center devices are always forced 100 full (servers, routers, switches, firewalls, hosts)

first place I'd look is errors on the switch ports.

 
Thanks for the tip. I'm forcing the FS to 100 FD. The switch is set for auto. I'll tinker with that when I get a chance tomarrow.
 
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