On May 24, 2012, at 15:04, Daniele Milani <dano1...@hotmail.it> wrote:
>
>
> > From: je...@nicira.com
> > Date: Wed, 23 May 2012 09:20:21 -0700
> > Subject: Re: [ovs-dev] Problem with DHCP and TUNNEL
> > To: dano1...@hotmail.it
> > CC: disc...@openvswitch.org; dev@openvswitch.org; roberto.sa...@polito.it;
> > paolo.smirag...@polito.it
> >
> > On Wed, May 23, 2012 at 8:59 AM, Daniele Milani <dano1...@hotmail.it> wrote:
> > >
> > >
> > >> From: je...@nicira.com
> > >> Date: Wed, 23 May 2012 08:27:35 -0700
> > >> Subject: Re: [ovs-dev] Problem with DHCP and TUNNEL
> > >> To: dano1...@hotmail.it
> > >> CC: disc...@openvswitch.org; dev@openvswitch.org;
> > >> roberto.sa...@polito.it;
> > >> paolo.smirag...@polito.it
> > >
> > >>
> > >> On Wed, May 23, 2012 at 7:49 AM, Daniele Milani <dano1...@hotmail.it>
> > >> wrote:
> > >> > Hi,
> > >> > I have the following situation:
> > >> > -two different physical hosts (H1 and H2);
> > >> > -in H1 I created a bridge (br1) and I started a dnsmasq daemon
> > >> > listening
> > >> > on
> > >> > it (DHCPDAEMON1);
> > >> > -in H2 I created another bridge (br2) and I started a dnsmasq daemon
> > >> > listening on it (DHCPDAEMON2);
> > >> > -I created a gre tunnel between H1 and H2.
> > >> >
> > >> > The problem is that, if I start a Virtual Machine on H1 I receive DHCP
> > >> > offer
> > >> > both from DHCPDAEMON1 and DHCPDAEMON2, and if I start a VM on H2 I
> > >> > obtain
> > >> > the same behaviour.
> > >> >
> > >> > My question is: is it possible to prevent DHCP traffic from passing
> > >> > into
> > >> > the
> > >> > tunnel?
> > >>
> > >> You can write a flow using ovs-ofctl to drop DHCP traffic.
> > >
> > > Where can I find an example of how to write a flow?
> >
> > The man page.
>
> Does it exist an OvS command that returns the port number from port name?
>
Yes ovs-vsctl -- get Iterface portname ofport
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