[ovs-dev] Error after inserting MPLS flow using OVS2.0
Ben Pfaff
blp at nicira.com
Fri Feb 7 04:51:00 UTC 2014
Q: Does Open vSwitch support MPLS?
A: Before version 1.11, Open vSwitch did not support MPLS. That is,
these versions can match on MPLS Ethernet types, but they cannot
match, push, or pop MPLS labels, nor can they look past MPLS labels
into the encapsulated packet.
Open vSwitch versions 1.11, 2.0, and 2.1 have very minimal support
for MPLS. With the userspace datapath only, these versions can
match, push, or pop a single MPLS label, but they still cannot look
past MPLS labels (even after popping them) into the encapsulated
packet. Kernel datapath support is unchanged from earlier verions.
Open vSwitch version 2.2 will be able to match, push, or pop up to
3 MPLS labels. Looking past MPLS labels into the encapsulated
packet will still be unsupported. Both userspace and kernel
datapaths will be supported, but MPLS processing always happens in
userspace either way, so kernel datapath performance will be
disappointing.
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