Specifying a particular route

[Antoine Bagula <bagula@cs.sun.ac.za>]

Dear Tarik and Christiane,

I have seen a message from Eric Wong adressed to you about specification
of a particular route. I don't know if you have answered or if you have
any reply for Eric. If you do please copy me in your reply because i
also have that problem. If there is any script in the /tcl/ex examples
related to that topic , please inform me.

Bagula. 

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---------- Forwarded message ----------
Date: Sat, 12 Feb 2000 01:35:26 +0800
From: Eric Wong <wongcne@singnet.com.sg>
To: Christiane <christiane@trt6.gov.br>,
     Tarik Alj <aljtarik@ozias.inrs-telecom.uquebec.ca>,
     ns-users@mash.CS.Berkeley.EDU
Subject: Specifying a particular route 

Hi,

Can I ask if it is possible to define specific path between 2 pairs of
source and destinations nodes with the current ns2.1b5?

This is what I am trying to get.

                        bs1  bs2
                            \  /
            s1       r1--r2--r3      d1
                \    /    \      /   \    /
                  r0-----r4-----r5
                /           /  \           \
            s2        bd1 bd2       d2


That is for s1 and s2 I want them to follow a specific path to d1 and d2
respectively.
i.e.     s1 -> r0 -> r1 -> r2 -> r3 > r5 -> d1
         s2 -> r0 -> r4 -> r5 -> d2

While for sources bs1 and bs2 to destination bd1 and bd2, they follow the
normal shortest path route.

Is there any way of defining an expilcite path? I know that this can be done
by using
$n1 add-route-to-adj-node -default $r1

however to use this I have to turn off routing $ns rtproto Manaul however, I
still need routing for the source bs1 and bs2?

Is the anyway I can do to add my own routing entries? What changes can I
make to the curent classifier such that it can define it's own path yet
keeping it's original capability?

any info is greatly appreciated. thanks.

Thanks.
Eric