[ovs-discuss] Re : Re : ip_gre_mod.ko module
dan at nicira.com
Mon Jun 28 23:53:49 UTC 2010
On Fri, Jun 25, 2010 at 6:03 AM, DarkBls <darkbls at yahoo.com> wrote:
> Il fix the problem, thank you for your help. I gave another IP / physical
> interface for the tunnel.
> I still have some questions about GRE Tunneling.
> For now I have:
> On phosphorus (eth0:192.168.93.201 / eth1:172.16.0.201)
> br0 (tap0 + gre0 -> 172.16.0.202)
> On sulphur: (eth0:192.168.93.202 / eth1:172.16.0.202)
> br0 (tap0 + gre0 -> 172.16.0.201)
> A VM on phosphorus can ping a Vm on sulphur through the GRE tunnel.
> What if I want to make several br (br1, br2 and br3) on phosphorus and I
> want them to be connected through their own GRE tunnel on their sulphur
> counterpart (br1, br2 and br3) only ?
Do you want to have multiple bridges on each server just to isolate one set
of VMs from another set of VMs? If so, you could just have a single bridge
on each server joined by a single tunnel (like your initial example) but
place each set of VMs on a different VLAN for isolation. The GRE tunnel
will carry the VLAN tagged traffic between the two bridges and the switch at
either end will enforce the VLAN isolation.
> *De :* Jesse Gross <jesse at nicira.com>
> *À :* DarkBls <darkbls at yahoo.com>
> *Cc :* Justin Pettit <jpettit at nicira.com>; discuss at openvswitch.org
> *Envoyé le :* Mar 22 juin 2010, 0h 01min 22s
> *Objet :* Re: [ovs-discuss] Re : ip_gre_mod.ko module
> On Mon, Jun 21, 2010 at 3:47 AM, DarkBls <darkbls at yahoo.com> wrote:
>> ovs-vsctl --db=tcp:192.168.93.201:1977 create interface name=gre0
>> type=gre options:remote_ip=192.168.93.204
>> ovs-vsctl --db=tcp:192.168.93.201:1977 create port name=gre0
>> ovs-vsctl --db=tcp:192.168.93.201:1977 add bridge br0 ports
> All this looks fine.
>> I must have missed something since I don't see any port 47 opened on any
> GRE runs over IP protocol 47, not TCP or UDP port 47 so you won't see it
> listed in netstat -l.
> Since a flow is being setup that is sending traffic to the GRE port the
> configuration should be fine. Can you do a tcpdump on the physical
> interface to see if there is GRE traffic? Is it possible that something
> like iptables is blocking GRE traffic?
> discuss mailing list
> discuss at openvswitch.org
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