Re: [EXTERNAL] Re: Limited Domains:

+1 on the different meanings to different people on limited domains

The concept of limited domains has definitely evolved and grown but I think
the main underlying theme of limited or I think a better term is “closed”
domain is simply the “operators” network whatever that encompasses which
could be a single AS or 100s of ASs that maybe have many administrative sub
domains as containers within the overall operators domain.

MPLS was a means of confining the concept of a domain but within inter AS
options the domain sprawl can still be a collection of ASs.

There are many nuances with the term limited or closed domain so can also
be very different on a case by case basis.

Also the concept of domain varies drastically even from public operators
domain verses private internal domain.  Also even within a single operators
network their maybe multiple sub domains within public and private network
within an operators overall “domain” that may be parts of different
administrative boundaries but even so they still communicate and is not a
“limited or closed” domain.  There are even case where the public and
private have peering points to each other connect at the hip over MPLS.

At a high level you can think of a corporation and all of its many sub
domains which are part of many separate administrative domains that somehow
are all interconnected public and private are now part of one very large
“limited” or “closed” domain.

There are so many variables and variations and nuances the idea of a
“limited” or “closed” domain exists which could encompass all sub domains
and thus in some cases that limited domain may not see that limited as it
could be quite massive.

Thanks

Gyan

On Fri, Apr 16, 2021 at 6:12 PM Manfredi (US), Albert E <
albert.e.manfredi@boeing.com> wrote:

> From: ipv6 <ipv6-bounces@ietf.org> On Behalf Of Robert Raszuk
>
> > I think this this thread nicely demonstrates that we need to first
> define what a "limited domain" is.
> >
> > To some it seems to be 1980s definition of an IGP network boundary. More
> modern folks would consider as "limited domain" a set of IGP ASNs areas
> interconnected by p2p BGP still under the same administration.
> >
> > For me "limited domain" is an arbitrary collection of sites anywhere in
> the world using Internet for inter-connectivity.
>
> Good point! Whereas to me, "limited domain" means, only inside this
> platform.
>
> > So any protocol which claims to be defined for "limited domain" and
> which claims that it is backwards compatible with nodes not supporting it
> is equal to allow it to traverse Internet.
>
> "Backwards compatible" may mean different things to different people, and
> it seem dubious in this case (because flow label is to be a random value,
> per IPv6). My main view is, if the domain is truly limited, firewalled or
> even air gapped, then what is the motivation to seek approval in a
> standards body?
>
> Bert
>
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*Gyan Mishra*

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