In most production networks, if you need to diagnose a link or a path, it is very handy to send a set packet per second (PPS) rate.
This article demonstrates how to send a semi-static PPS for the purpose of troubleshooting.
To send a semi-static PPS, perform the following steps:
- From the Command Line Interface, enter the shell.
-
Execute the ping -f *ip address* command. (Note that the "-f " is critical.)
root@qfx5100> start shell
root@qfx5100:RE:0% ping -f 172.26.250.192
PING 172.26.250.192 (172.26.250.192): 56 data bytes <-- This looks like nothing is being sent, but it is.
..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................^C
--- 172.26.250.192 ping statistics ---
15856 packets transmitted, 15011 packets received, 5% packet loss <-- Some packet loss is acceptable and does not constitute an error.
round-trip min/avg/max/stddev = 0.866/5.883/145.989/9.097 ms
-
Now run the monitor interface traffic command and see the PPS on your interface.
root@qfx5100> monitor interface traffic
Interface Link Input packets (pps) Output packets (pps)
xe-0/0/45 Up 0 (0) 37 (0)
xe-0/0/46 Up 0 (0) 37 (0)
xe-0/0/47 Up 0 (0) 37 (0)
et-0/0/48 Up 109546 (523) 66513 (523)
et-0/0/49 Down 782 (0) 27234 (0)
et-0/0/50 Down 404 (0) 27491 (0)
As you can see, the ping -f *ip address* command sends approximately 500 PPS.