When the source device receives the port unreachable ICMP error message, it knows that the
6.
packet has reached the destination, and it can get the addresses of all the Layer 3 devices involved
to get to the destination device (1.1.1.2, 1.1.2.2, 1.1.3.2).
Diagnostic tool operations
Ping operation
NOTE:
The web interface supports the IPv4 ping operations only.
Select Network > Diagnostic Tools from the navigation tree to enter the ping configuration page, as
shown in
Figure
Figure 261 Ping configuration page
Type in the IPv4 address or the host name of the destination device in the text box, and click Start to
execute the ping command. You will see the result in the Summary area, as shown in
261.
295
Figure
262.