Juergen, One I2RS agent can interface with multiple routing elements.
The network view (which consists of multiple nodes, i.e. topology) has to be over multiple nodes. Therefore, it is the interface between client and Agent. Whereas, there are commands to individual routing element. Linda -----Original Message----- From: Juergen Schoenwaelder [mailto:[email protected]] Sent: Monday, June 29, 2015 3:28 AM To: Linda Dunbar Cc: '[email protected]'; [email protected]; Jan Medved (jmedved); [email protected]; [email protected]; Hariharan Ananthakrishnan; [email protected] Subject: Re: [i2rs] comments to draft-ietf-i2rs-yang-network-topo-01 Linda, according to draft-ietf-i2rs-architecture-09, an I2RS agent is part of a routing element. I am not sure your understanding "I2RS Agent is like the SDN controller" is consistent with the architecture document. /js On Fri, Jun 26, 2015 at 05:03:25PM +0000, Linda Dunbar wrote: > Alex, et al, > > The I2RS architecture depicts two types of interfaces: > > - One is the interface between Agent and Client, and > > - another is the interface between Agent and Routing entities. > > > The network model and inventory are more for the interface between Agent and > the Clients, isn't it? One single routing engine doesn't need to know the > overall topology and inventory information of other nodes, even though some > may do. > > > And the /nd:network/nd:node and Termination points are more for the interface > between the Agent and the Forwarding Engine, isn't it? > > IMHO, the information models should be oriented around the I2RS architecture. > I.e. with description on where those information models are applicable, > making it easier to differentiate from other IETF WGs work (such as L2VPN, > L3VPN, or SFC). I recall there were some debates at the Dallas I2RS session. > > I2RS Agent is like the SDN controller, which can inform clients about the > topology information, instruct routes to routing engine of multiple nodes, > and retrieve link & termination points status from each of those nodes. > > The "Service Overlay" in Section 3.4.8 is definitely meant for clients not > towards individual nodes. Mixing them all together make it confusing. > > Cheers, > > Linda Dunbar > > > _______________________________________________ > i2rs mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/i2rs -- Juergen Schoenwaelder Jacobs University Bremen gGmbH Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany Fax: +49 421 200 3103 <http://www.jacobs-university.de/> _______________________________________________ i2rs mailing list [email protected] https://www.ietf.org/mailman/listinfo/i2rs
