Hi Jesse and openvswitch team, Thanks for all your suggestions till now. I was able to establish the gre tunnel between 2 vms located on the same subnet on 2 different hosts. I am not able to figure out the configuration steps to establish the gre tunnel when the vms are located in different subnets, from the available documentation. This is what I have done till now:
host1: ip address: 10.0.0.1 host2: ip address: 10.0.0.2 vm on host1 : 192.168.0.14 vm on host 2: 192.168.0.15 bridge br0 created on host 1: ip address : 192.168.0.1 bridge br0 created on host 2: ip address : 192.168.0.2 As you can see, the ip address I have assigned to the bridge is in the same subnet as the vm ip addresses. Also, there is a tap0 interface on both hosts, which is added to the bridge. Eacg vm (which is a UML), is started using this tap0 interface. Now, I start openvswitch on both hosts. After adding tap0 top br0, I create a gre tunnel: On host 1: sudo ovs-vsctl add-port br0 gre0 -- set interface gre0 type=gre options:remote_ip=10.0.0.2 On host 2: sudo ovs-vsctl add-port br0 gre0 -- set interface gre0 type=gre options:remote_ip=10.0.0.1 The above works ok. Now, as soon as I change one of the vms to be in a different subnet, and also the bridge on the host of the vm to be in that same subnet, what else do I need to change to get it working? Your help is much appreciated. Thanks, Aish On Fri, Sep 9, 2011 at 9:12 PM, Aishwarya <aish...@gmail.com> wrote: > Hi Jesse, > > Sorry to bother you with so many questions. But my question from the > beginning has been how to configure gre tunnel for vm-to-vm communication > using openvswitch. I have got it to work for vms in the same subnet, but am > not able to for vms in different subnets. It would be very helpful to me if > you could guide me through the configuration steps. > > Thanks, > Aish > > > On Fri, Sep 9, 2011 at 9:03 PM, Jesse Gross <je...@nicira.com> wrote: > >> I think at this point these questions don't particularly relate to >> Open vSwitch, so perhaps some background reading on general network >> principles would be appropriate first. >> >> On Fri, Sep 9, 2011 at 8:21 PM, Aishwarya <aish...@gmail.com> wrote: >> > Hi Jesse, >> > >> > I was doing the following: >> > >> > ifconfig eth0 0.0.0.0 up from teh terminal. >> > >> > Regarding gre tunnel, if one vm has an ip address of 192.168.0.1/24 and >> the >> > other has an ipaddress of 192.168.10.1/24, how do i configure gre to >> make >> > these 2 communicate. Right now, i have created a bridge br0 on both >> physical >> > hosts, and added an interface of type gre to it. It works as long as >> both >> > vms and bridges are in the same subnet. It stops working as soon as i >> change >> > ip address of vm2 to be a different subnet. >> > >> > Thanks, >> > AIsh >> > >> > On Fri, Sep 9, 2011 at 8:15 PM, Jesse Gross <je...@nicira.com> wrote: >> >> >> >> On Fri, Sep 9, 2011 at 8:08 PM, Aishwarya <aish...@gmail.com> wrote: >> >> > Hi Jesse, >> >> > >> >> > Ok.. this solution does not seem to work for me. The problem is that >> as >> >> > soon >> >> > as I take the physical interface eth0 off the network(i.e. assign it >> an >> >> > ip >> >> > of 0), all networking stops for me and the machine hangs. This >> happens >> >> > every >> >> > time. >> >> >> >> You should probably use the console to make networking changes. >> >> >> >> > I tried the gre tunnel and that seems to work for me. But I want to >> know >> >> > if >> >> > that can be used to connect vms in multiple subnets as well? >> >> >> >> Yes. >> > >> > >> > >
_______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
