I think you'll have to work out these problems yourself, or find someone
else to help you.  I still have no idea what h1-eth0 or h2-eth0 is or
how they relate to anything.

On Fri, Aug 01, 2014 at 03:37:13PM +0100, Bruce SUN wrote:
> Hi Ben,
> 
> I am sorry fo rmy spell mistake. It is h1-eth0. My simple topology is as
> follows:
> 
>  [image: Inline image 1]
> 
> After starting openvswitch, I add eth0 (internet interface) to the
> openvswitch.
> 
> Then run the command "ifconfig eth0 0.0.0.0" to make eth0 as an openvswitch
> port.
> 
> Next run the command "dhclient s1". It seems that the port s1 becomes the
> Internet interface and gets the IP "10.0.2.15"
> 
> Now I can ping outside website from VM.
> 
> If I want to ping outside website on H1/H1, I need also run the command
> "dhclient h1-eth0/h2-eth0" on H1/H2.
> 
> The route table of H1 is as follows:
> 
> Kernel IP routing table
> 
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 
> default         10.0.2.2        0.0.0.0         UG    0      0        0
> h1-eth0
> 
> 10.0.0.0        *               255.0.0.0       U     0      0        0
> h1-eth0
> 
> 10.0.2.0        *               255.255.255.0   U     0      0        0
> h1-eth0
> 
> It seems that the port "s1" of the openvswitch "s1" has become a real
> bridge of eth0. Eth0 become an internal port of the openvswitch.
> 
> 
> Best Regards,
> 
> Bruce
> 
> 
> 
> 
> On Thu, Jul 31, 2014 at 10:27 PM, Ben Pfaff <b...@nicira.com> wrote:
> 
> > On Thu, Jul 31, 2014 at 05:11:34PM +0100, Bruce SUN wrote:
> > > I just run "h1 dhclient h1-eht0". The problem is solved, but I don't know
> > > the reason.
> > > mininet> h2 ping www.sina.com
> > > PING wwwus.sina.com (12.130.132.30) 56(84) bytes of data.
> > > 64 bytes from 12.130.132.30: icmp_seq=2 ttl=238 time=173 ms
> > > 64 bytes from 12.130.132.30: icmp_seq=3 ttl=238 time=167 ms
> > > 64 bytes from 12.130.132.30: icmp_seq=4 ttl=238 time=166 ms
> >
> > This is the first you've mentioned an interface h1-eht0 (or h1-eth0).
> > Where does it come from?
> >
> > > mininet@mininet-vm:~$ ping www.sina.com
> > > PING wwwus.sina.com (12.130.132.30) 56(84) bytes of data.
> > > 64 bytes from 12.130.132.30: icmp_seq=1 ttl=238 time=173 ms
> > > 64 bytes from 12.130.132.30: icmp_seq=2 ttl=238 time=172 ms
> > >
> > > Could you tell me what is function of the port (the name is the same as
> > > openvswitch bridge, like s1)? I am confused about the port. It seems
> > > meaningless except here.
> >
> > Suppose that IP addresses were assigned to physical interfaces instead
> > of internal interfaces.  This has a straightforward interpretation for
> > packets destined to that IP address that arrive on the physical
> > interface.  But what about packets destined to that IP address that
> > arrive on some other port on the bridge?  It would not make sense for
> > those packets to automatically be received on the IP address, because
> > that would prevent configuring the switch to do something else.  And an
> > action to output the packet on the physical port would naturally mean to
> > transmit it out on the physical wire.  So, basically, assigning an IP
> > address to a physical port raises a lot of questions.
> >


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