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.Introducing `bareudp` device support for encapsulating MPLS traffic over UDP tunnel as a Technology Preview
The support for `bareudp` devices is now available with the `ip link` command as a Technology Preview. The `bareudp` devices provide L3 encapsulation tunnelling support for routing traffic with different L3 protocols, such as unicast and multicast multi protocol label switching (MPLS) and IPv4/IPv6 inside the UDP tunnel. You can start routing MPLS packets in UDP with the help of adding `tc` filters and actions.
For example, to create a new `bareudp` device, use the following command:
----
# ip link add dev bareudp0 type bareudp dstport 6635 ethertype mpls_uc
----
To route MPLS incoming packets in UDP tunnel using the bareudp0 device, use the following command:
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# tc qdisc add dev enp1s0 ingress
# tc filter add dev enp1s0 ingress proto mpls_uc matchall \
> action tunnel_key set src_ip 2001:db8::22 dst_ip 2001:db8::21 id 0 \
> action mirred egress redirect dev bareudp0
----
For more information about options and parameters used while creating `bareudp` devices, refer to the `Bareudp Type Support` section in the `ip-link(8)` man page.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (iproute bug fix and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2021:1653