Thanks, that's exactly what I was looking for! On Thu, Jun 2, 2022 at 9:31 AM Lewis Denny <lde...@redhat.com> wrote:
> Hi Lars, > > I had a similar question recently, the answer I got is the following: > > "A patch port is not the same as a veth pair. It is not used to "send" and > "receive" traffic. When we process an upcall and have to determine what > actions > to perform on a packet, a patch_port is is basically an equivalent to > "continue > processing openflow flows on this other bridge" > > The following blog post goes into some detail on the topic: > https://arthurchiao.art/blog/ovs-deep-dive-4-patch-port/ > > I hope this helps. > > On Thu, Jun 2, 2022 at 11:03 PM Lars Kellogg-Stedman <l...@redhat.com> > wrote: > >> Given two OVS bridges connected by a patch port, I would like to run >> `tcpdump` on either of the patch interfaces to see traffic passing between >> the switches. The command runs without error, but doesn't see any of the >> expected traffic. >> >> The basic configuration looks something like this: >> >> ovs-vsctl add-br br0 >> ovs-vsctl add-br br1 >> ovs-vsctl add-port br0 patch-br1 -- set interface patch-br1 >> type=patch options:peer=patch-br0 >> ovs-vsctl add-port br1 patch-br0 -- set interface patch-br0 >> type=patch options:peer=patch-br1 >> >> I want to run `ovs-tcpdump -i patch-br1 -n`, but it doesn't seem to work. >> I see the same behavior if I manually set up a mirror port and run >> `tcpdump` on it. >> >> Is it possible to set up mirrors for patch ports? >> >> >> -- >> Lars Kellogg-Stedman <l...@redhat.com> >> >> _______________________________________________ >> discuss mailing list >> disc...@openvswitch.org >> https://mail.openvswitch.org/mailman/listinfo/ovs-discuss >> > > > -- > > Lewis Denny, RHCE > > OpenStack > > Software Maintenance Engineer > > Red Hat APAC <https://www.redhat.com> > <https://www.redhat.com> > -- Lars Kellogg-Stedman <l...@redhat.com>
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