Using the ping and loopback Commands

VIP Port Adapter Functions

Checking the Conﬁguration

After conﬁguring the new interface, use the show commands to display the status of the new interface or all interfaces.

Using Show Commands to Verify the VIP Status

The following steps use show commands to verify that the new interfaces are conﬁgured and operating correctly.

Step 1 Use the show version command to display the system hardware conﬁguration. Ensure that

	the list includes the new serial interfaces.
Step 2	Display all the current interface processors and their interfaces with the show controllers
	cbus command. Verify that the new VIP appears in the correct slot.
Step 3	Specify one of the new serial interfaces with the show interfaces serial slot/port command
	and verify that the ﬁrst line of the display speciﬁes the interface with the correct slot
	number. Also verify that the interface and line protocol are in the correct state: up or down.
Step 4	Display the protocols conﬁgured for the entire system and speciﬁc interfaces with the show
	protocols command. If necessary, return to Conﬁguration mode to add or remove protocol
	routing on the system or speciﬁc interfaces.
Step 5	Display the running conﬁguration ﬁle with the write terminal (or show running-conﬁg)
	command. Display the conﬁguration stored in NVRAM using the show conﬁg (or show
	startup-conﬁg) command. Verify that the conﬁguration is accurate for the system and each
	interface.

If the interface is down and you conﬁgured it as up, or if the displays indicate that the hardware is not functioning properly, ensure that the network interface is properly connected and terminated. If you still have problems bringing the interface up, contact a customer service representative for assistance.

The packet internet groper (ping) and loopback commands allow you to verify that an interface port is functioning properly and to check the path between a speciﬁc port and connected devices at various locations on the network. This section provides brief descriptions of these commands. After you verify that the system and VIP have booted successfully and are operational, you can use these commands to verify the status of interface ports. Refer to the publications listed in the section “If You Need More Conﬁguration Information” on page 2, for detailed command descriptions and examples.

The ping command sends an echo request out to a remote device at an IP address that you specify. After sending a series of signals, the command waits a speciﬁed time for the remote device to echo the signals. Each returned signal is displayed as an exclamation point (!) on the console terminal; each signal that is not returned before the speciﬁed time-out is displayed as a period (.). A series of exclamation points (!!!!!) indicates a good connection; a series of periods (.....) or the messages

[timed out] or [failed] indicate that the connection failed.

72VIP-4R/4T Installation and Conﬁguration