Re: A few questions

[Muneyb Minhazuddin <Muneyb.Minhazuddin@tip.csiro.au>]

Hi Phil,
 
> It could be funny and crazy that the Olympics makes Sydney. -:)
> 
> Basically, I think that it's possible and feasible that your network is
> built using the Accelar boxes in place of the Linux ones. For the
> Diffserv, you need to use Passport/Accelar 8600 routers (as the core
> router). Accelar 1100B provides a few packet forwarding priority levels
> but have no Diffserv concept. You can capture and drop packets on both
> Accelars. Another issue is that ORE and JFWD is currently available for
> Accelar 1100B 

Rob Duncan had mentioned that he was testing out a new release of JFWD,
when I sent the oplet code that I had tried, is it available now?

and shortly for Accelar 8600 (we'are waiting for the 8600
> JVM delivery). JFWD is going to provide a Diffserv mapping soon.

That's good news, it will be interesting to see the parameters that one
would be able to set using these mappings.

> > 
> > Q1. Is this the right way to proceed?
> Most likely. Do the ingress and egress routers need the Diffserv
> support?

Not really. They should have marking capabilities, the traffic-filters in
the 1100B meet those requirements.

> > 
> > Q2. (To Rob Duncan) Are JFWD and JCapture ready for use? You mentioned in
> > a previous mail that you are testing a new release of JFWD?
> True.

Is it available? If yes, I would appreciate a URL and password for
it. BTW, I already have a version that I downloaded on the 12th of July, I
am interested in a later release for 1100B (if any).

> > Q3. Can my procedure, as mention above, possible on an Accelar at the
> > Ingress?
> I think so.

Glad to hear that my understanding of your ORE, JFWD and
JCapture functionalities is alteast right.

> > 
> > Q4. Will I be able to replace my Core router with the 8600 ?
> Could be. You can learn more about 8600 from the document links of the
> download page (http://www.openetlab.org/download).

I have read them, its the same argument as Glynn's so I will leave that
for him to pursue.
 
> > 
> > Q4a. How do configure my Diffserv capable router with the following queues
> > 
> > (repeated here from above for convenience)
> > 
> > CBQ based schedulers with
> > 
> > *EF packets going through a short FIFO queue
> > *AF packets going through four GRED queues ( accounting for the four AF
> > classes). Each GRED queue in turn is equipped with 3 RED queues to provide
> > for the 3 Drop Precedences.
> > *Best effort packets go through a RED queue.
> > 
> > Q4b. Or their equivalent mechanisms?
> I do not have so much details about setting up these queues and/or
> dropping mechanisms. A Nortel Networks internal document provides info
> about them without detail configurations. I will take care this and give
> you an answer asap. I hope that other people give more inputs about
> this.
Thanks. I will anxiously look forward to any information on the above.

Cheers
Muneyb
_________________________________________________________
Muneyb Minhazuddin - Telecommunications Research Engineer    
CSIRO Telecommunications and Industrial Physics                
Sydney, NSW, Australia.                                    
                                                             
Phone no. : 61 2 9372 4113
FAX       : 61 2 9372 4490          
e-mail    : mminhazu@tip.csiro.au  
Home Page : http://www-networks.tip.csiro.au/~mminhazu
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