I'm following these instructions to setup a gre tunnel between two VMs on two
identical systems with Fedora 19.
http://networkstatic.net/open-vswitch-gre-tunnel-configuration/
With the fedora openvswitch module it works and I'm able to ping between VMs (I
had to unload ip_gre and gre modules before loading openvswitch). However, if I
compile and use the master branch, it doesn't work. The kernel is
3.11.8-200.fc19.x86_64.
I have two identical systems with the latest openvswitch master branch running.
Each has physical interface p4p1. They're connected back-to-back.
Switch setup on system 1 is below. The other system is exactly the same except
of course for remote_ip 173.16.50.100.
Bridge "br2"
Port "br2"
Interface "br2"
type: internal
Port "tap0"
Interface "tap0"
Port "gre0"
Interface "gre0"
type: gre
options: {remote_ip="173.16.50.101"}
Bridge "br0"
Port "p4p1"
Interface "p4p1"
Port "br0"
Interface "br0"
type: internal
My VMs are connected to tap0 on each system. I have set ips 173.16.50.100 and
173.16.50.101 on br0 of the systems and I can ping between them.
However, I'm not able to ping vm-vm. Digging into this, I see it's because ARP
is not resolved. On the destination system, I see the GRE encapsulated ARP
packets being received at p4p1 and br0. But they don't get forwarded and
delivered via br2 - tap0 to the VM and therefore get no reply.
Does something have to be done differently with the latest code?
Nithin.
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