Hi Abhishek,
   Are you still able to ping when the agent is not running?  Did you try using 
"dropstats" to see if there are any drops inside vrouter?
Are you seeing any checksum errors go up on the receiver of the ping (using 
netstat)?

Raja

From: Dev 
<[email protected]<mailto:[email protected]>> 
on behalf of abhishek jain 
<[email protected]<mailto:[email protected]>>
Date: Tuesday, September 29, 2015 at 10:50 AM
To: "[email protected]<mailto:[email protected]>" 
<[email protected]<mailto:[email protected]>>, 
"[email protected]<mailto:[email protected]>" 
<[email protected]<mailto:[email protected]>>
Subject: Re: [opencontrail-dev] Checksum offload error with 
contrail-vrouter-agent running on compute node

CCing Omartsyniuk

On Tue, Sep 29, 2015 at 7:36 PM, abhishek jain 
<[email protected]<mailto:[email protected]>> wrote:
Hi Team


We are getting checksum error from the powerpc  ubuntu 32 bit as compute node 
when the contrail-voruter-agent userspace agent is running after ping is 
initiated from the compute node.Please find the attached screanshot for the 
same.We have  disabled checksum offload at both eth0 as well as vhost0 on the 
powerpc ubuntu.

ethtool -K eth0 tx off

ethtool -k vhost0 | grep checksum
rx-checksumming: off [fixed]
tx-checksumming: off
        tx-checksum-ipv4: off [fixed]
        tx-checksum-ip-generic: off [fixed]
        tx-checksum-ipv6: off [fixed]
        tx-checksum-fcoe-crc: off [fixed]
        tx-checksum-sctp: off [fixed]


However still we are not able ping the outside world with 
contrail-vrouter-agent binary running and we are facing same ipv4 checksum 
offload incorrect error when we capture packets after ping is initiated from 
the compute node.

Do we need to make changes in contrail-vrouter-agent code regarding this?


Please help regarding this.
Thanks
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