On Tue, Feb 14, 2017 at 11:03:22PM -0800, Stephen Stuart wrote:
> On Feb 14, 2017 05:42, "C. L. Martinez" <carlopm...@gmail.com> wrote:
> 
> On Tue, Feb 14, 2017 at 01:26:49PM +0000, C. L. Martinez wrote:
> > On Tue, Feb 14, 2017 at 01:29:57PM +0100, Miroslav Lachman wrote:
> > > C. L. Martinez wrote on 2017/02/14 12:57:
> > > > On Mon, Feb 13, 2017 at 02:02:48PM +0100, Daniel Niculescu wrote:
> > >
> > > >
> > > > Thanks Daniel. I have tried what you say, but ping doesn't works
> between host and guest. If I put an ip to the bridge works ok, but not when
> I assign an ip to tap interface.
> > > >
> > > > Any idea why??
> > >
> > > Are you using IPs from the same subnet on host and in a guests? What IP
> did
> > > you assign to tap / bridge?
> > >
> > > Miroslav Lachman
> >
> > Yes. For host: 172.22.55.1/24 and for guest 172.22.55.29/24. When I
> assign IP 172.22.55.1 to the bridge on host side, host and guest can
> communicate. But when I assign 172.22.55.1 to a tap interface on the host
> and create a bridge with host's tap interface and guest's tap interface,
> there is no comms between them ... And I don't understand why ...
> >
> >
> > --
> > Greetings,
> > C. L. Martinez
> 
> Ok, I think I have found the problem (but not the solution :( ) ...
> 
> prodif: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         ether 02:bc:f9:66:98:01
>         nd6 options=9<PERFORMNUD,IFDISABLED>
>         groups: bridge
>         id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
>         maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
>         root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
>         member: tap11 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
>                 ifmaxaddr 0 port 7 priority 128 path cost 2000000
>         member: tap10 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
>                 ifmaxaddr 0 port 6 priority 128 path cost 2000000
> pubif: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         ether 02:bc:f9:66:98:02
>         nd6 options=9<PERFORMNUD,IFDISABLED>
>         groups: bridge
>         id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
>         maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
>         root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
>         member: tap21 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
>                 ifmaxaddr 0 port 9 priority 128 path cost 2000000
>         member: tap20 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
>                 ifmaxaddr 0 port 8 priority 128 path cost 2000000
> tap10: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
> mtu 1500
>         options=80000<LINKSTATE>
>         ether 00:bd:1d:15:f7:0a
>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>         media: Ethernet autoselect
>         status: active
>         groups: tap
>         Opened by PID 79946
> tap11: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
> mtu 1500
>         options=80000<LINKSTATE>
>         ether 00:bd:24:15:f7:0b
>         inet 172.22.55.1 netmask 0xffffffe0 broadcast 172.22.55.31
>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>         media: Ethernet autoselect
>         status: no carrier
>         groups: tap
> tap20: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
> mtu 1500
>         options=80000<LINKSTATE>
>         ether 00:bd:2b:15:f7:14
>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>         media: Ethernet autoselect
>         status: active
>         groups: tap
>         Opened by PID 79946
> tap21: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
> mtu 1500
>         options=80000<LINKSTATE>
>         ether 00:bd:31:15:f7:15
>         inet 172.30.77.1 netmask 0xfffffff8 broadcast 172.30.77.7
>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>         media: Ethernet autoselect
>         status: no carrier
>         groups: tap
> 
>  .. As you can see with tap21 and tap11 (tap interfaces assigned to host)
> status is: no carrier ... ¿¿¿¿¿???? Why?? Both are assigned to bridges ...
> 
> 
> Those tap interfaces have no carrier because they have not been opened by a
> guest VM and paired with a vtnet interface.
> 
> A tap interface is how the vtnet interface inside the guest VM shows up on
> the host side. No guest VM, no tap.
> 
> If you want the host to be able to exchange IP packets with the guest VM
> locally, the bridge (on the host) and vtnet interface (in the guest VM)
> need to be numbered in the same prefix. The tap interfaces don't get IP
> address assignments, the corresponding vtnet interfaces inside the VMs do.
> 

Ok, I have solved the problem. I am using source policy routing in this 
installation, because I need to route Internet traffic via wlan0 interface. Due 
to the impossibility to bridge wlan interface, I have created two routing 
tables. Adding default route to rtable 1, solved the problem.

Many thanks to all for your help.

-- 
Greetings,
C. L. Martinez
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