Subject: [CCAMP] Relationship between explicit-route-usage in TE Tunnel and TE Topology information

From: Italo Busi <[email-masked]>
Date: Wed, 12 Apr 2017 14:53:23 +0000

Within the CCAMP Transport NBI DT, we are analyzing how to use the  TE Tunnel and TE Topology YANG models at the northbound interface of an SDN controller (e.g., an ACTN MPI interface) and got some questions for clarification.

Looking at the current YANG model for the explicit-route-objects, as defined in the TE Tunnel YANG model, we have seen the following information:

       |  +--rw named-explicit-paths

       |  |  +--rw named-explicit-path* [name]

       |  |     +--rw name      -> ../config/name

       |  |     +--rw config

       |  |     |  +--rw name?                     string

       |  |     |  +--rw explicit-route-objects

       |  |     |     +--rw explicit-route-object* [index]

       |  |     |        +--rw index                 -> ../config/index

       |  |     |        +--rw explicit-route-usage?   identityref

       |  |     |        +--rw config

       |  |     |        |  +--rw index?            uint32

       |  |     |        |  +--rw (type)?
<...>

       |  |     |        |     +--:(unnumbered-link)

       |  |     |        |     |  +--rw unnumbered-hop

       |  |     |        |     |     +--rw router-id?    inet:ip-address

       |  |     |        |     |     +--rw interface-id?   uint32

       |  |     |        |     |     +--rw hop-type?       te-hop-type

However, we are not sure how a client application can get the router-id and the interface-id of an unnumbered link using the TE Topology information.

One possibility could be that:

·         The router-id corresponds to the te-node-id in the TE Topology model

·         The interface-id corresponds to the te-tp-id in the TE Topology model

Is our understanding correct?

In this case, would it be possible to have some explicit description of this mapping somewhere in TEAS Internet-Drafts?

Carlo, Italo, Gianmarco and Sergio on behalf of DT members

Italo Busi
Principal Optical Transport Network Research Engineer
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