Description

This article explains how to check the number of fragment packets received by SRX series devices by retrieving stats from PFE.

Solution

Examples for how to check if fragments are received on a particular SPU

Shell mode for HE devices
Incremental value shows the device is currently receiving fragments: 

root@lab-SRX% cprod -A node0.fpc7.pic0 -c "show usp flow counters all" | grep "Rcv fragment pkt"
        Rcv fragment pkt                         95
        Rcv fragment pkt                         95
root@lab-SRX% cprod -A node0.fpc7.pic0 -c "show usp flow counters all" | grep "Rcv fragment pkt"
        Rcv fragment pkt                        101
        Rcv fragment pkt                        101


CLI mode for HE devices 

root@lab-SRX> request pfe execute target tnp tnp-name node0.fpc1.pic0 command "show usp flow counters all" | grep "Rcv fragment pkt"
        Rcv fragment pkt                          0
        Rcv fragment pkt                          0