BIRD - Config Support for RFC 3107 - Carrying Label Information in BGP

Ondrej Zajicek santiago at
Thu May 24 01:15:59 CEST 2018

On Wed, May 23, 2018 at 07:40:26PM +0000, Thiruvazhiyan Lakshmanan wrote:
> Hi Ondrej,
> Thanks for the reply! How about incoming labels coming from 3107 neighbor? Can BIRD program the kernel table with mpls label for next-hop loopback?

Yes, incoming routes with labels received from RFC 3107 neighbor can be
programmed to kernel IP table as routes with MPLS label for next-hop
loopback (for outgoing traffic). Unfortunately, BIRD will not insert
corresponding MPLS routes to kernel MPLS table (for incoming labelled
traffic). Although this is probably not a problem for PE router, where
either penultimate hop popping or static decapsulating MPLS routes can
be used.

Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3,
"To err is human -- to blame it on a computer is even more so."

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