Re: Classifier and Routing?

[Tarik Alj <aljtarik@ozias.inrs-telecom.uquebec.ca>]

Sun,	
	The classifier at a node is filled in ns-node.tcl, Node instproc 
add-route; wich is called in ns-route.tcl's Simulator compute-flat-routes. 
Concerning the classify() function, i 'm also trying to figure it out, 
particularly the port classification: it seems classification happens on adress 
and on port # at the same time? What if I need to access to different headers at 
the same time to classify?
	
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> From: K Sun <ksun@essex.ac.uk>
> To: ns-users@mash.cs.berkeley.edu
> Subject: Classifier and Routing?
> Date: Fri, 1 Oct 1999 18:28:43 +0100 (GMT Daylight Time)
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> 
> Hello,
>      I am still confused with the relation between Classifier and 
> Routing operation of ns, especially the operation of setting "slot" 
> arrry.
>      Actually, I have carefully read the chapter about Unicast Routing, 
> but I do not find where a function of routing fills the suitable 
> handlers of links (or connectors) in the "slot[]" array. 
>      I have not known the function classify well. 
> As my understanding, the number of elements of slot[] array ( at 
> least in Address Classifier according to Figure 5.1 on page 35) should 
> be one more than the number of links which are attached to this node. I 
> am not sure whether my understanding is right.
>      However, according to the code on page 40 and page 38, it seems 
> the number of elements of "slot" arrary has should be the same as the 
> number of nodes in topo because the classify function only shifts and 
> masks the whole address (including node id and agent id). 
> 
>      Hope somebody may give me more implication on understanding 
> classifier and routing!
> 
>      Thanks in advance,
> 
>      Sun Kai
> 
> 

Tarik