A control-plane is useful in the major co-cs
transport networks (mainly
for S-PVCs and resilience) but its a minor player
compared to role of
the management-plane. The converse of course holds
in a *traffic*
carrying cl-ps IP network, esp when this is in the
context of the
public Internet.....but of course this isn't the
case here and IP is
only being used as the transport protocol in the OOB
that carries the control/management-plane protocols.
These were points I wanted to make.....hopefully
I've done a better job
From: Adrian Farrel [mailto:email@example.com]
Sent: 23 July 2005 00:08
To: Harrison,N,Neil,IKM1 R
Subject: Re: Ethernet Control Plane [Was: Re:
Frameformat in a l2cs
I think John beat me off the blocks here, but...
GMPLS assumes an IP control plane.
An IP control-plane? There is actually no such
animal. Just what
the heck does that REALLY mean in GMPLS say?
Let me explain.
Perhaps I should have said "IP-based control plane".
I mean a control plane which:
- uses IP as its network protocol
- uses IP addresses to identify control plane
- uses IP addresses to identify data plane resources
the control plane
- uses protocols developed for use in the Internet.
I am not questioning IP as a cl-ps networking
a signalling protocol (RSVP-TE, or dare I mention
PNNI, or any
signalling protocol yet to be invented) or a
(OSPF or ISO or whatever)
I am glad to hear it.
or even management protocols
Fine, but not in the remit of CCAMP.
but an 'IP Control Plane' per se means absolutely
nothing to me....
Well, I think it should. I think the list of
attributes that I have
given above define a control plane based on IP.
It is undoubtable that attempts have been made to
use control planes
based on other protocols. Some have been highly
successful. Some have
been less fortunate.
...nor should it to anyone else.
I think folks who were around at the beginning of
CCAMP and who were
part of the debate with the IESG will be very
familiar with where the
IETF draws the line here.
I think some folks might need a reality check
on the self-assumed importance of a control-plane.
Hint: It ain't
that important.....the management-plane (which may
be using IP!)
I am not sure how to interpret this.
It may be that you think that control plane is bad
per se, but you have
said elsewhere that you think it has value - but
much less than the
It may be that you believe that CCAMP is willfully
management plane. This would, in fact, be true. It
is not in CCAMP's
remit to look at the management plane. Other SDOs
are working to
establish common standards for management of network
multiple vendors - we can wish them luck.
Clearly some people (vendors and providers) see
sufficient value in a
control plane to invest time and energy.
The (hype) party is over for the OTN start-ups.
IP per se does NOT
define a *control-plane*...IP is cl-ps networking
....and its jolly important, but PLEASE don't try
and feed me any of
this 'IP control plane' nonsense.