how to test a 10/100 mbps ethernet swtich

Tags:
Network testing
Networking
Switches
TCP
I have a 10/100 Mbps ethernet switch which is claimed to not function properly. So is et up a LAN using the switch, issgned IP address to 2 computer, connected them to the swtich and started pinging one computer from the other. So, now , after pinging PC1 from PC2, all the ports on the switch work, i get " reply from (IP Adress) " in the dos prompt window. But when i reverse it .. as in .. ping PC2 from PC1 . it says " request timed out " . From what i understand it is possible that the Rx of the prt might not be working, but it can send data. n hence " request timed out and 4 packets sent but 0 packets received" ... But so, i interchanged the LAN cables and connected them to the same ports.. so now again when i ping PC1 to PC2 . when it should not work because i interhcanged the cables so the computer are connected to interchanged ports , it works and i get reply. But again pinging PC2 to PC1, it says " request timed out " Can anyone tell me how to test the switch further.... is the switch at fault in the first place ??

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Since you are receiving replies from PC2, it is safe to assume that the TCP/IP stack is configured and functioning properly on both computers. Check to see if there is a host-based firewall on PC1. If so, disable it for testing purposes only on the isolated network that you have setup on the switch. If you receive replies, you will want to re-enable the firewall on the PC but allow ICMP as an exception to pass through.

Also check your subnet masks are matching at both ends.

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  • Rick Vanover
    One possibility is a TCP/IP filter rule or firewall configuration on PC1. Meaning, PC1 says I can talk to anyone, but no one can talk to me unsolicited. If it is IPSEC, it will be a little harder to find, in Windows XP it is in Advanced properties of TCP/IP.
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