[ns] Diffserv module in ns-2.1b8a

Hi all,

I took the reference from ns-mailing list about the diffserv module in ns-2.1b5. I am using ns-2.1b8a as my simulation tool. I need your help and support in the following aspects.

1. The specifications given for the Diffserv module ns-2.1b5 is same in ns-2.1b8a? or if there are some changes , kindly update the specifications to me.

2. Where can I found the model files and documentations fo r this diffserv module, as the link specified below is not working. The information in ns-manual is not enough.

3. I need a DSCP ( DiffServ Codepoints) used in this module mapped to their corresponding PHBs, Is it included with Dynamic RT/NRT PHB group( as I searched the ietf working group specifications are expired in July'1999 for DRT/NRT PHB group)

Thanks for your help and time you spare to provide these very valuable informations to me

QaziRashid..

=======================================

Title: RE: Diffserv Model for NS 2.1b5 available from Nortel Networks Open IP Environment Group

Hello,

A new release of the Nortel Networks Open IP Diffserv Model for NS
is available for download at http://www7.nortel.com:8080/CTL/.

The following additions have been made to the model:
        1. Class Selector PHB and Default PHB added.
        2. Bounded Strict Priority Scheduler
        3. DropTail AQM
        4. Minor code adjustments (see feedback)

Thanks to all of those who gave feedback.

There is some on-going work to port this to the latest release of NS.

Regards,

Peter Pieda
613-765-3999
Nortel Networks

-----Original Message-----
From:   Pieda, Peter [CAR:0R31:EXCH]
Sent:   Sunday, July 23, 2000 3:26 PM
To:     '[email protected]'; '[email protected]'; '[email protected]'
Cc:     Ethridge, Jeremy [CAR:0R31:EXCH]; Baines, Mandeep [CAR:0R31-A:EXCH]; Seddigh, Nabil [CAR:0R31:EXCH]; Nandy, Biswajit [CAR:0C40:EXCH]

Subject: Diffserv Model for NS 2.1b5 available from Nortel Networks Open IP Environment Group

The Open IP Environment group at Nortel Networks is releasing the
Diffserv NS model that it has used for much of its Diffserv simulation
work over the last 2 years. The model files and some documentation
are available from http://www7.nortel.com:8080/CTL/.
The current version is compatible with the 2.1b5 release of NS.

This model follows the Diffserv architecture in that a node can have
Edge or Core capabilities. This Diffserv model includes many of the
popular PHBs, Meters, and Policers available at the IETF today. It
offers rudimentary classification capability.

The model has been found to provide suitably similar results in
comparison with real world Diffserv products. Many of the results from
some of our recent Diffserv-related papers were obtained using this
model.

The Model has the following capabilities:
    - Per Hop Behaviors (PHB):
        * Assured Forwarding,
        * Expedited Forwarding.
    - Meters/Policers:
        * TSW 2 Color Marker (TSW2CM)
        * TSW 3 Color Marker (TSW3CM),
        * Single Rate 3CM (srTCM),
        * Two Rate 3CM (trTCM),
        * 2 Color Token Bucket.
&nb! sp;   - Active Queue Management (AQM):
        * RIO-Coupled
        * RIO-Decoupled,
        * WRED.
    - Schedulers:
        * WRR,
        * WIRR
        * RR.

Peter Pieda
613-765-3999
Nortel Networks