On Thursday 23 July 2015 04:16 AM, Dave Waters wrote:
Hi,
I have two ports in my OVS bridge. I receive packets from one port
(portA) and i send them out of the other (portB). When i send out the
packets, they are VXLAN tunneled to the other end.
Now, the default MTU of all ports (including the bridge port) is 1500
in my setup.
The issue is that when i get a 1500 byte packet on portA, i try to
push it out on portB after slapping on the VXLAN headers. This results
in a packet size thats greater than what portB can handle, and hence
the packets are dropped.
Is increasing MTU of portB to 1550 (to accommodate additional 50 bytes
when no vlan taged) a constraint in your setup ?
I know that OVS does not handle IP fragmentation/reassembly, so how do
we deal with this situation? I dont think we can rely on path MTU
discovery since not all applications do PMTU before spewing out
packets. Any ideas, anybody?
Warm regards,
Dave
--
Regards,
Gowrishankar M
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