Hi,

Look at the interface stats on the switch for the server ports,

Show interface fa0/1

FastEthernet0 is up, line protocol is up

Hardware is Lance, address is 0060.3ef1.702b (bia 0060.3ef1.702b)

.....

115331 packets input, 27282407 bytes, 0 no buffer

Received 93567 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

0 input packets with dribble condition detected

143782 packets output, 14482169 bytes, 0 underruns

0 output errors, 1 collisions, 5 interface resets

0 babbles, 0 late collision, 7 deferred

0 lost carrier, 0 no carrier

perhaps you have a routing issue, or perhaps you have errors on

your switch ports, bad cable etc ....... need more information on your setup.

You can monitor a port on a switch via a span session:

http://www.cisco.com/warp/public/473/41.html

You can use various debug commands; see here http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_25_sea/command/reference/debug.html

HTH - Please rate if it does.

Regards

Stephen