[Nml-wg] modelisation of the network description and dynamic circuits

[John Vollbrecht]

This has been a great thread, and I would like to throw in a couple  
ideas about how DCN setup works or could work to get your ideas.

First -  There are a couple cases where the obvious way of describing  
a network doesn't work for DCN.
Case 1 - We have a network with an ethernet interface to a switch.   
The switch is statically configured to take some VLANS to one  
endpoint and other VLANS to other networks.  The way we have talked  
about handling this is to create a separate link for each VLAN group.

I am not good at XML so I will write this as

domain=Internet2
node=Boston-Ciena
port = ethenet-A
link = bu.edu

domain=Internet2
node=Boston-Ciena
port = ethenet-A
link = tufts.edu

Now  in the properties (I  think) for each link will be included the  
allowable VLANS.
My question is how one describes a link as a set of VLANS

Case 2 - Between I2-NY and GEANT-Paris we want to create multiple GE  
circuits which can be used to create connections between I2 and  
GEANT.  One way to do this seems to be to create a "traffic  
engineering-link" between NY and Paris.  The GE Ports are used when  
making a connection, and the points of the link have to determine  
which ports are available in much the same way that we determine  
which VLANS are available now.  This seems to me to be equivalent to  
creating a "virtual" link between NY and Paris.

I think Aaron said this would be possible (I may have  
misunderstood).  If so I am wondering how this would be represented  
in the topology schema, and then how it is presented - presumably as  
a "view" or model to DCN.

John