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[Openstack] URGENT: packet loss on openstack instance


[root at compute-33 ~]# ifconfig tap5af7f525-5f | grep -i drop
        RX errors 0 dropped 0 overruns 0 frame 0
        TX errors 0 dropped 2528788837 overruns 0 carrier 0 collisions 0

Noticed tap interface dropping TX packets and even after increasing
txqueue from 1000 to 10000 nothing changed, still getting packet
drops.

On Sat, Sep 15, 2018 at 4:22 PM Satish Patel <satish.txt at gmail.com> wrote:
>
> Folks,
>
> I need some advice or suggestion to find out what is going on with my
> network, we have notice high packet loss on openstack instance and not
> sure what is going on, same time if i check on host machine and it has
> zero packet loss.. this is what i did for test...
>
> ping 8.8.8.8
>
> from instance: 50% packet loss
> from compute host: 0% packet loss
>
> I have disabled TSO/GSO/SG setting on physical compute node but still
> getting packet loss.
>
> We have 10G NIC on our network, look like something related to tap
> interface setting..