RE: How many can administrative groups assigned?

["Ravi Sankar Mantha" <ravi.mantha@wipro.com>]

[ post by non-subscriber.  with the massive amount of spam, it is easy to
  miss and therefore delete mis-posts.  so fix subscription addresses! ]

 According to RFC 3212 (Constraint-Based LSP Setup using LDP ), the
definition of "RsCls " (32bit) field of the Resource Class TLV is,
        'The Resource Class bit mask indicating which of the 32
        "administrative groups�� or "colors�� of links the CR-LSP can
        traverse. '
 That should mean that the resource classes should be linterpreted as a bit
mask.
regards,
Ravi
-----Original Message-----
From: owner-mpls@UU.NET [mailto:owner-mpls@UU.NET]On Behalf Of
sven.van_den_bosch@alcatel.be
Sent: Wednesday, May 08, 2002 1:46 PM
To: Naidu, Venkata
Cc: '???'; mpls@UU.NET; CCAMP; te-wg@ops.ietf.org
Subject: RE: How many can administrative groups assigned?


Naidu, Kim,

I think it depends a little bit on the interpretation. In principle the
resource classes can be interpreted either as a bit mask (in which case 32
'base' classes can be defined) or as an integer value (in which case 2^32
values can be used). Even with the bit mask interpretation, derived
resource classes can be built by combining multiple non-mutually exclusive
'base' classes (you could have 32 generic classes called 1, 2, 3 and so on
and then build your resource classes on top of those). The problem lies of
course in the processing of the resource class information. If they are not
used in a simple bitmask, an AND operation is not sufficient to determine
the resource class of a link. Also, if a link would have multiple derived
classes, different TLVs would be needed. It would make sense to expand a
little bit on these issues in the appropriate documents. In my opinion,
this is a general issue with the TE extensions, so it should be explained
there.

Sven.





"Naidu, Venkata" <Venkata.Naidu@Marconi.com> on 07/05/2002 16:16:29



  To:          "'???'" <jhyoung.kim@samsung.com>,
               mpls@UU.NET, CCAMP <ccamp@ops.ietf.org>,
               te-wg@ops.ietf.org

  cc:          (bcc: Sven VAN DEN BOSCH/BE/ALCATEL)



  Subject      RE: How many can administrative groups
  :            assigned?






Kim,

-> If so, how many can administrative groups assigned? 32 or 2^32 ?

  32. A link can me member of multiple admin groups.

--
Venkata.




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