I've added reasons why some connections are invalid.  The reason we cannot have 
3 routers on one subnet is because subnets only allow 2 connections, and 
additionally each subnet is being used to determine a single interface on the 
router.  This was how it was in the old gbuilder.  I can try to modify it, but 
I'll need to know how this should affect Switches and UMLs.  For example, would 
we be allowed to add a Switch or UML to that same Subnet already connecting 3 
or more routers?  If we do change this, the static route computation algorithm 
would most likely require modification as well.

-----Original Message-----
From: gini-devel-boun...@cs.mcgill.ca [mailto:gini-devel-boun...@cs.mcgill.ca] 
On Behalf Of GINI development
Sent: September 17, 2009 3:21 PM
To: gini-devel@cs.mcgill.ca
Subject: Re: [Gini-devel] connect subnet to > 2 routers

Daniel is the best person to comment.. but I think the
restriction that limits a subnet to a single router comes from
the static route computation algorithm. If that is capable
of handling this scenario, then we should include this option.

-----Original Message-----
From: gini-devel-boun...@cs.mcgill.ca
[mailto:gini-devel-boun...@cs.mcgill.ca] On Behalf Of GINI development
Sent: Thursday, September 17, 2009 3:16 PM
To: gini-devel@cs.mcgill.ca
Subject: [Gini-devel] connect subnet to > 2 routers

What is involved in getting a subnet to connect to greater than 2
routers?  This would be very helpful for Assignment 2.  If it's too
much work to get done by Monday, can we at least change the error
message when trying to connect more than 2 routers to a subnet?  It
currently says "Cannot connect subnet to a Router!", which is clearly
wrong.

Also, even if this isn't possible by Monday, it's definitely something
that needs fixing in the future.

Alex
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