[c-nsp] Object tracking

[Dean Smith]

Method 1)

Create an object to track the interface state
Create a boolean object to reverse the state of the first object.
Add a /32 static route to Null0 for the Tunnel Destination IP dependant on 
the 2nd object.

If the interface is up Object 1 = True, Object 2 = False, Null0 route wont 
be installed. Tunnel Stays up.
If the interface is down, Object 1 = False, Object 2 = True, Static route 
installed, Tunnel goes down.

You'll need 12.4T I think to get all those bits.

Method 2)

Use the EEM to detect the interface down on the tracked interface - and 
trigger a CLI action to shut the tunnel interface
(and the reverse aswell)

Dean
----- Original Message ----- 
From: "Gary Roberton" <gary.ciscomail at gmail.com>
To: <cisco-nsp at puck.nether.net>
Sent: Thursday, May 29, 2008 4:01 PM
Subject: [c-nsp] Object tracking


> This one could be interesting...
>
> I have a tunnel interface that I only want to be up when the ethernet
> interface on the router is up.  I don't want to relate the tunnel to the
> address of the ethernet, I need these to be separate.
>
> So, does anyone know if I can shut the interface if the status of the 
> object
> changes?  If you have any example code that would be great...
>
> Thanks
>
> Gary
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