I've got 3-3640's with their eth0 ports running into a 2950-12 switch. I've got ports fa 0/1 - 8 setup as access, portfast, and members of vlan 10. interface vlan 10 ip address 192.168.1.100 255.255.255.0 no sh is SET. IP default-gateway is 192.168.1.4 <-(eth 0 of one of the 3640's). My laptop is plugged into fa 0/7, and is setup with static IP 192.168.1.50 255.255.255.0 with a default gateway of 192.168.1.4 I can ping everything (all routers and the switch management IP) from the laptop, bring up SDM on all routers, and CSM on the switch. I can also access the switch from the console and ping the management port and all three routers, but I can't ping my PC from the console. why?
Is it possible that the Windows Firewall is active on your PC and this is preventing the ping responses from being returned?
It would not be the first time that I have seen the Windows FW be the cause :)