Vyatta Network OS Documentation

Learn how to install, configure and operate the Vyatta NOS, which helps drive our virtual networking & physical platforms portfolio.

How to use twping to measure IP performance

An example of how to use twping to measure round-trip IP performance.

Note: To start the steps in this task, first enter operational mode.
Use the twping command to send a request to the TWAMP server to measure the round-trip IP performance.
vyatta@R2:~$ twping 11.1.0.1 count 10 session-count 2
Approximately 4.2 seconds until results available                 
                                                                  
--- twping statistics from [11.1.0.1]:8889 to [Rtr2]:55026 ---
SID:    0b010001d961f8d25daa301413dddec8                          
first:  2015-07-28T12:49:23.476                                   
last:   2015-07-28T12:49:24.605                                   
10 sent, 0 lost (0.000%), 0 send duplicates, 0 reflect duplicates 
round-trip time min/median/max = 0.746/1.5/2.39 ms, (err=1.11 ms) 
send time min/median/max = 0.196/0.6/1.54 ms, (err=0.556 ms)      
reflect time min/median/max = 0.543/0.9/1.79 ms, (err=0.556 ms)   
reflector processing time min/max = 0.0129/0.0277 ms              
two-way PDV = 0.9 ms (P95-P50)                                    
send PDV = 1 ms (P95-P50)                                         
reflect PDV = 0.9 ms (P95-P50)                                    
send hops = 0 (consistently)                                      
reflect hops = 0 (consistently)                                   
                                                                  
                                                                  
--- twping statistics from [11.1.0.1]:8904 to [Rtr2]:42203 ---
SID:    0b010001d961f8d25eff1b28f68b20f7                          
first:  2015-07-28T12:49:23.495                                   
last:   2015-07-28T12:49:24.940                                   
10 sent, 0 lost (0.000%), 0 send duplicates, 0 reflect duplicates 
round-trip time min/median/max = 1.24/1.6/3.24 ms, (err=1.11 ms)  
send time min/median/max = 0.37/0.7/2.52 ms, (err=0.556 ms)       
reflect time min/median/max = 0.713/0.9/1.51 ms, (err=0.556 ms)   
reflector processing time min/max = 0.0157/0.031 ms               
two-way PDV = 1.7 ms (P95-P50)                                    
send PDV = 1.9 ms (P95-P50)                                       
reflect PDV = 0.7 ms (P95-P50)                                    
send hops = 0 (consistently)                                      
reflect hops = 0 (consistently)