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3.18.2 Loopback
The Loopback Test page (Figure 3-59) provides two different loopback tests. One is an Internal Loopback
Test and the other is an External Loopback Test. The former test will not send test signals outside the
switch. The test signal only tests the signals within the switch. The latter test sends the test signal to the
device connected to the other end. If the cable is not connected to an active network device, the switch
will report that the external loopback test has failed.
Note:
Whatever you choose Internal Loopback Test or External Loopback Test, these two
functions will interfere with normal system operations, and all packets will stop being sent
and received temporarily.
Figure 3-57: Loopback Test Page
3.18.3 Ping
Test
The Ping Test page (Figure 3-58) allows the user to perform a ping on an external address to see if the
remote device is accessible or not via ICMP protocol. To perform a test, enter the IP address to ping and
click “Ping”. The results of the ping will appear after a few seconds.
Note:
Some devices may not reply to a ping even though they are active and working
properly, depending on how they are configured. Many software firewalls on computers
will prevent the computer from replying to a ping request.
Figure 3-58: Ping Test Page
