This is a great thing to do, but I would not use a BGP capability to do it.
The capability is signaled only in the BGP OPEN message, at the start of the
session.
Changes cannot be signaled without bouncing the session.
The BGP capability is only exchanged with neighbors.
Perhaps we could do it
Dear GROW chairs and participants,
I would like to propose draft-jaufeerally-bgp-lg-cap-00 (
https://datatracker.ietf.org/doc/draft-jaufeerally-bgp-lg-cap/) as a
mechanism for in-band dissemination of looking glass endpoints in BGP,
using a new OPEN message capability.
The rationale behind this
