Hi, Sorry again, but I realized my previous question wasn't worded very clearly. Is there a way to intercept OVS/OVN packets in the Linux kernel? I've heard that there is a way to do this by writing a kernel module but I haven't found any leads.
Thanks, Brendan On Wed, May 4, 2016 at 11:43 PM, Brendan Chang <bsch...@mit.edu> wrote: > Hi, > > Sorry for reviving an old thread. To clarify, does the packet itself > contain the tunnel_key of the datapath binding? If so, what exactly is the > structure of a packet in this case or where in the packet would I find this > field? > > Thanks, > > Brendan > > On Wed, Nov 4, 2015 at 1:00 PM, Ben Pfaff <b...@nicira.com> wrote: > >> On Wed, Nov 04, 2015 at 11:34:07AM -0500, Brendan Chang wrote: >> > I'm using OVN for a project for network performance isolation and I was >> > wondering if there are any packet headers or fields which tell what >> logical >> > network they came from? >> > >> > For example, if I had two isolated logical networks where switch 1 >> connects >> > clients A and B and switch 2 connects clients C and D, is there some >> field >> > which tells if a packet came from the first network or the second? >> >> Yes, the network of a packet is encoded in the encapsulation. See >> "Tunnel Encapsulation" in ovn-architecture(7). >> >> (A packet that traverses a logical router passes through multiple >> networks. The one that appears on the wire would be that of the >> destination logical switch.) >> > >
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