Re: [ns] [Q]how to implement backup link for reliability?

[John Mehringer <mehringe@ISI.EDU>]

It sounds like to me that you want to have traffic to switch from one route
to another.  I think you can do this by having a link failure occur on the
link 2-3 which will force the traffic to 2-4.  I also think you may need
another link 4-3.  You can read about link failures in the ns tutorial.

http://www.isi.edu/nsnam/ns/tutorial/nsscript3.html

I hope this helps,

- John

Greg Polgo wrote:

> Hello!
>
> I need to construct a network with a topology of
>
>       1  ---  2  ---  3
>                  |
>                  |--  4
>
> where only one flow is assumed in the network.
> This topology is for 'reliability' project that I'm working on.
> As a newbie, I'm wondering
>
>   (1) Is it possible to construct a link with 'null' traffic?
>       (so that I can forward a traffic of 2 -- 3 to 2 -- 4,
>       when necessary.)
>
>   (2) Where/which files are involved in traffic management
>       of a specific node to link?
>       (In this example, a node/link 2 -- 3, and a node/link 2 -- 4)
>
>   (3) I would like to know the interaction
>       between source(sink) and agent at a node.
>       If someone could give me an idea based on the relevant files,
>       that would be a great help.
>
> I studied the files of queue.*, schedule.*, connector.*,
> object.*, agent.* etc,  but it's not clear to me yet.
> Please help a newbie to be able to start.
> Any reply would be appreciated.
>
> Greg.
>
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