For an eBGP peer, this field indicates whether all routes with IPv4 address family received from the peer should have an extended community attached containing the bandwidth of the link to the eBGP peer when the routes are propagated to iBGP peers as per draft-ietf-idr-link-bandwidth-06 (subject to send_ext_comm configuration). Changing the value of this object while the peer is active causes DC-BGP to review whether the extended community should be added to or removed from routes received from the peer (as appropriate) and propagates any changes to its iBGP peers. This setting has no effect on routes with address family other than IPv4.