What is the meaning of an ecs log

[Darren Ankney]

Is that the entire log message or just part of it?  Is this a
recursive or authoritative name server?  What version of bind?

Logging is covered in the manual though I don't really see a
comprehensive explanation of message format (maybe it's there and I'm
just not seeing it).
https://bind9.readthedocs.io/en/v9_18_9/reference.html#logging-block-grammar

On Wed, Dec 7, 2022 at 7:42 PM Mik J via bind-users
<bind-users at lists.isc.org> wrote:
>
> Hello,
> I see logs like [ECS 192.168.2.0/24/0] but I don't understand what is the last /0 part.
> Where can I get an explanation ?
> Regards