Step 7: Ping the T1 Interface

Purpose

Use the ping command to verify the loopback connection.

Action

To ping the local interface, use the following JUNOS CLI operational mode command:

user@host> ping interface t1-fpc/pic/port local-IP-address bypass-routing count 
1000 rapid

Sample Output

user@host> ping interface t1-1/1/0 1.1.1.1 bypass-routing count 1000 rapid 

PING 1.1.1.1 (1.1.1.1): 56 data bytes

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--- 1.1.1.1 ping statistics ---

1000 packets transmitted, 1000 packets received, 0% packet loss

round-trip min/avg/max/stddev = 2.036/2.120/9.809/0.681 ms

What It Means

This command sends 1000 ping packets out of the interface to the local IP address. The ping should complete successfully with no packet loss. If there is any persistent packet loss, open a case with the Juniper Networks Technical Assistance Center (JTAC) at support@juniper.net, or at 1-888-314-JTAC (within the United States) or 1-408-745-9500 (from outside the United States).