[ovs-discuss] "lost" counter in the ovs-dpctl

Cosmin Marius Caba cosm at fotonik.dtu.dk
Thu Mar 6 13:56:20 UTC 2014


Hello,

I am trying to see the number of dropped packets for each port in OVS.
I've executed the following command but I don't exactly know what some of the output means.


root at mininet-vm:~# sudo ovs-dpctl -s show
system at s1:
        lookups: hit:3234544 missed:55 lost:141463
        flows: 0
        port 0: s1 (internal)
                RX packets:0 errors:0 dropped:0 overruns:0 frame:0
                TX packets:12 errors:0 dropped:0 aborted:0 carrier:0
                collisions:0
                RX bytes:0  TX bytes:756
        port 1: s1-eth1
                RX packets:2485978 errors:0 dropped:0 overruns:0 frame:0
                TX packets:748737 errors:0 dropped:0 aborted:0 carrier:0
                collisions:0
                RX bytes:2223352793 (2.1 GiB)  TX bytes:1127490734 (1.1 GiB)
        port 2: s1-eth2
                RX packets:748621 errors:0 dropped:0 overruns:0 frame:0
                TX packets:2122835 errors:0 dropped:0 aborted:0 carrier:0
                collisions:0
                RX bytes:1127641888 (1.1 GiB)  TX bytes:1844748850 (1.7 GiB)



What does the lookups entry mean? More specifically the lost counter?
Is the lost counter in the lookups entry related to the number of dropped packets that I see at the end-points of a traffic low?
If yes, then why there are no dropped packets on any of the ports?


Thank you,
cosmin
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