Re: Hierarchical addressing (fwd)

[Shuqian Yan <syan@jupiter.nal.utoronto.ca>]

Hi, 

Below is a forwarded message about the hierarchical addressing format
should be used for large multicast simulations (with more than 256 nodes
in your graph...)

shuqian

---------- Forwarded message ----------
Date: Thu, 5 Nov 1998 15:44:58 -0800 (PST)
From: Padmaparna Haldar <haldar@ISI.EDU>
To: Shuqian Yan <syan@jupiter.nal.utoronto.ca>
Subject: Re: Hierarchical addressing


Shuqian,
I think if you really dont care about hier rtg, it'd be convinient for you
to just call Node expandaddr. this would give you an addr space of 30 bits
with 8bits allocated for port and rest for nodeaddr.
also be careful to allocate mcast address by calling "Node allocaddr".

Otherwise if you do want to use hier addressing you'd have to generate
hierarchical node address (using the right topology generator/converter)
and you'd have to set the EnableHierRt_ flag to 0 explicitly.

Obviously the first option seems more attractive/easy to me!
cheers,
--Padma.


On Thu, 5 Nov 1998, Shuqian Yan wrote:

> Hi, Padma
> 
> My only intesnsion now is to expand the address space without any
> hierarchical routing, so with "Node expandaddr" augmented in the
> simulation script will do the work. or do I have to also disable the
> EnableHierRt_ flag (set the flag to "0" since I am only have one level
> hierarchy), I found one of the posting in the ns archives you've
> mentioned this.
> 
> tks,
> 
> shuqian
>  
> 
> On Thu, 5 Nov 1998, Padmaparna Haldar wrote:
> 
> > On Wed, 4 Nov 1998, Shuqian Yan wrote:
> > 
> > > Hi, Padma
> > > 
> > > My question: are all the mulicast routing protocols currently available in
> > > NS supporting the hierarchical addressing scheme (as opposed to flat
> > > addressing), thus one can simulate large graphs with more than 500 nodes? 
> > 
> > Hierarchical addressing should work for any routing protocol you use
> > (unicast/mcast). However I'm not sure if you want to use hierarchical
> > routing as well, which is supported in mcast extensions as well.
> >  If you simulate large topologies using DM you should be
> > able to do that by simply expanding addrspace thru "Node expandaddr".
> > hierarchical routing can also be used for memory savings. 
> > You can see examples for both in ~ns/tcl/ex
> > 
> > Hope this helps,
> > --Padma.
> > 
> > 
> > > 
> > > If for example the DM protocol is only supporting flat addressing and I
> > > want to simulate large graphs using available DM, what are the changes
> > > should be made?
> > > 
> > > tks,
> > > 
> > > shuqian
> > > 
> > > 
> > 
> > ------------------------------------------------
> > Be true to your work, your word, and your friend.
> > --Thoreau
> > 
> > Padmaparna Haldar
> > ISI/USC.
> > 310.822.1511 #352
> > 
> > 
> 

------------------------------------------------
Be true to your work, your word, and your friend.
--Thoreau

Padmaparna Haldar
ISI/USC.
310.822.1511 #352