Check For Duplicate Ip Addresses; Connect Directly With A Crossover Cable - DPS Telecom NetGuardian Techno Knowledge Paper

Unable to Telnet to NetGuardian

□ Check for duplicate IP addresses.

If the pings continue to return without the Net Guardian plugged in, check for duplicate IP addresses on the
If the pings are not returned with the NetGuardian unplugged, proceed to the next step:

□ Connect directly with a crossover cable

◦ Connect the test PC to the NetGuardian using an Ethernet crossover cable. (If you do not have a
crossover cable on hand, you can also use a simple hub or switch)
▪ You may need to temporarily change the IP address of your PC to be directly on the
NetGuardian's subnet.
◦ If the PC can connect fine when directly connected, check the network firewall or network
connectivity.
◦ If the PC cannot establish a connection even when directly connected, proceed to the next step:
First, Unplug the NetGuardian Ethernet port.
Ping the NetGuardian's IP address again
network.
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