IDR and BESS, which standardize BGP and BGP related VPN features in IETF, are doing working group last calls on features relating to BGP extended communities and are looking for community input.
The motivation for this update was the link bandwidth feature, extensively used by data center and service provider networks. That feature completed last call recently. The related plumbing for the main extended community feature, and the EBGP DMZ use case for link bandwidth that allows for aggregation, are the pieces going through last call.
4360-bis last call thread:
https://mailarchive.ietf.org/arch/msg/idr/fftaCU5jpiYynWFfgex0dkjXB4E/
EBGP DMZ last call thread:
https://mailarchive.ietf.org/arch/msg/bess/7t7F7X2yf59V-6YWv1v3L5NErXY/
