[ih] More terminology (Was: multi-protocol routers, bridges)

[Vint Cerf]

consider also SS#7

v


On Thu, Dec 2, 2021 at 6:08 PM Greg Skinner via Internet-history <
internet-history at elists.isoc.org> wrote:

>
>
> > On Nov 27, 2021, at 6:46 PM, Carsten Bormann <cabo at tzi.org> wrote:
> >
> > On 28. Nov 2021, at 00:32, Noel Chiappa via Internet-history
> <internet-history at elists.isoc.org> wrote:
> >>
> >> We distinguished between two very different activities which 'routers'
> >> performed; the handling of user traffic, which we called 'forwarding',
> and the
> >> computation of routing data/tables (by routing protocols/algorithms),
> which
> >> was often (but not always, IIRC) called 'routing'. (Slightly confusing,
> I
> >> know! :-)
> >
> > Indeed, but both meanings of ?routing? prevail.
> > I?ll call them routing1 and routing2, where routing1 is defined as the
> combination of routing2 and fowarding.
> >
> > We?ll use routing1 when describing the overall outcome, as in ?xyz does
> not route that traffic?, or in ?router?.
> >
> > We?ll use routing2 together with forwarding when it comes to how to
> implement routing1; RIB and FIB are clear examples of distinct concepts
> relating to routing2 and forwarding.  Routing protocols rarely provide
> forwarding and therefore are routing2.
> > (A router that uses strict source routing or an SDN setup does not do
> routing2 at all?)
> >
> > The terms control plane and data plane are another attempt to slice this
> cake; I must admit I don?t know when those gained popularity.
> >
> > Gr??e, Carsten
> >
>
> I was curious about the origins of control and data plane myself, so I
> looked into it a bit.  Their use dates back to at least the early 1990s.
> For example, see the 1991 CCITT (ITU) publication B-ISDN Protocol Reference
> Model and its Application, Recommendation I.321 <
> http://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-I.321-199104-I!!PDF-E&type=items>.
> As an example of when it entered the IETF vernacular, see a message from
> 1994 that was posted to the ATM list <
> https://mailarchive.ietf.org/arch/msg/atm/MELrqzESZnZZFCZsjpb_ZNRcjPY/>
> in response to a question about RFC 1577.
>
> —gregbo
>
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