HP 650 Installation Manual page 74

3-18
Troubleshooting
Identifying a Bad Component
Ping
Ping is a network-layer test that sends an Internet Control Message
Protocol (ICMP) echo request message to another node that has an IP
address and is able to respond to an ICMP echo request message. The
router must have IP routing configured in order to use this test.
1. From the Main menu, select the Network Control Language
Interpreter (NCL). The NCL prompt then appears at the bottom of
the screen. (See figure 3-1 on page 3-16.)
At the NCL prompt, enter one of the following sequences:
ping x.x.x.x [Return]
ping x.x.x.x count [Return]
ping x.x.x.x count wait [Return]
where:
x.x.x.x is the target node's IP address in dotted decimal
notation.
count (optional) is the number of times to repeat the echo
request packet. If an integer is not included, the packet is sent
once.
wait (optional) is how many seconds to wait for a response. If
a second integer is not included, the response must be received in
five seconds to be successful.
2. You will see a message, indicating either that the target node is
alive—meaning that communications are passing successfully from
the router to the remote node on a specific link—or that the remote
node did not respond. If you cannot reach any remote node, the
problem must be isolated to the router, the links used in the test, or
all of the remote nodes.
3. Use the Exit command to exit from NCL and return to the Main
menu:
exit [Return]
For more details, refer to chapter 16 of the Operator's Reference.