I have a Cisco 2960g 48-port switch. I’ve determined ports 25-28 are not functioning properly. Here is what works:
-I can get a DHCP address
-I can ping to/from a workstation connected to these ports.
-I can ping machines on the internet
-I can telnet from these ports to machines on my LAN.
Here is where it fails:
-I cannot access any windows file shares on other workstations in the domain
-I cannot establish HTTP connections to web sites (no web browsing).
The strange thing is that this is a layer 2 switch, and all my symptoms point to a layer 4 or above problem. But why is the problem specific to these ports?
I’ve checked the following on the switch:
-all ports are on the same VLAN (1).
-Problem ports 25-28 have no input, output, frame errors, etc. All 0.
-Tried issuing shut and no shut on the ports and it didn’t help.
-port counters look normal. Everything looks normal from the switch’s perspective.
The only thing I haven’t tried is a switch re-boot (it’s in production).
Anyone have any ideas or suggestions?
Thanx
Karl
