On Wed, Feb 26, 2014 at 11:42:09PM +0200, Antti Antinoja wrote: > Hi, > > We have been using the ovs source provided module since there where some > difficulties with gre tunnels + MTU. > > ping with small package size passed through, but testing for example with -s > 1500 did not. > > Maybe there is some way to make this to work with the Kernel provided module > too? > > With the ovs src provided module the GRE are working fine. Of course I'm not > sure if we do it efficiently (like not causing defragmentation continuously).
What version are you using? Because Path MTU is no longer supported. The problem is that when the packet is encapsulated, its size increases with the addition of the tunneling header. If the final size is above the MTU, then the packet is dropped. The Path MTU can discovery the real MTU and adjust it. So, you can work around the MTU issue by reducing it directly on the interface which will have the same final result. fbl _______________________________________________ discuss mailing list [email protected] http://openvswitch.org/mailman/listinfo/discuss
