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Re: FW: draft-ietf-ccamp-gmpls-architecture-05.txt

bert, the proposed text can be (as third paragraph of the
section 8):

"In GMPLS, the control channels between two adjacent nodes are no
longer required to use the same physical medium as the data links
between those nodes. Moreover, the control channels that are used to
exchange the GMPLS control-plane information exist independently of
the links they manage. Hence, LMP was designed to manage the data
links, independently of the termination capabilities of those data links."

thanks (also to john & jonathan for their help);
- dimitri.

Wijnen, Bert (Bert) wrote:
While review is taking place in the IESG, we've got this comment. Does it warrant a small piece of text to be added, or do we believe it has been addressed
properly already?

If text is to be added, then pls send suggested text
in an email with an indication as to where we want to
put it. Do not send a new revision of the ID (yet).

Thanks,
Bert

At 04:47 AM 4/16/2003 -0700, Randy Bush wrote:

one immediate question comes to mind ... they talk of a link
management protocl (lmp) (eg in chap 8) it seems to do just
about what ppp does. the obvious question is 'why not use
ppp?'

ppp control is done in-band. LMP supports the out-of-band mode, which
is important in optical networks where you can't simultaneously switch
some things through (user data) and take a look at other (control
messages). The out-of-band nature places some unique requirements
(such as 1:n control to data link ratio, link property correlation,
failure detection) that warrant a separate protocol.

If it isn't already explained in the document, one might want to add such an explanation. Documenting _why_ things are done is just
as important as document _what_ is done.




--
Papadimitriou Dimitri
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