On Sat, Dec 12, 2015 at 8:41 AM, Sowmini Varadhan <sowmini.varad...@oracle.com> wrote: > On (12/11/15 15:50), Tom Herbert wrote: >> layers of encapsulation. For example, suppose send a UDP packet in >> VXLAN in VXLAN, where packet looks like: >> IP|UDP|VXLAN|Eth|IP|UDP|VXLAN|Eth|IP|UDP. I believe the kernel can set > > Without detracting from the fact that you have probably found a bug > for checksumming here.. > > if you have multiple encapsulations above (vxlan over vxlan?) > I think lot of other things like pmtu may also be broken? (Each > encaps layer lowers the actual application mtu till the thing starts > to get absurd) > PMTU is going to be a headache with any encapsulation, multiple layers just makes the headache worse. This is one of the reasons why ILA is better for network virtualization-- no PMTU issue since there is no encapsulation being done.
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