On Fri, Jul 15, 2016 at 12:44 AM, Eder Leão Fernandes <ederleaofernan...@gmail.com> wrote: > Hi, > > Quick question. > How does Open vSwitch handles TCP checksum offloading? Does it recalculates > and rewrites the TCP checksum for every TCP packet? > > I am almost sure it does, since it looks like the only explanation to have > TCP sessions working on my mininet setup. (Two hosts with checksum > offloading connected by OVS. I am using iperf to create TCP sessions). > Just asking to confirm if there is not some kind of special handling.
Unless there is an action that modifies the packet, OVS doesn't touch the checksum of the packet, it just passes it through. If checksum offloading is in use then the checksum would ultimately be calculated by the NIC as it exits the machine. _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
