Re: [CCAMP] Connectivity-matrix in YANG models for WSON devices

Leeyoung <> Fri, 21 July 2017 13:11 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 16D34131CAF for <>; Fri, 21 Jul 2017 06:11:52 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -4.208
X-Spam-Status: No, score=-4.208 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001, T_KAM_HTML_FONT_INVALID=0.01, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id 0up2wCtrJA02 for <>; Fri, 21 Jul 2017 06:11:50 -0700 (PDT)
Received: from ( []) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by (Postfix) with ESMTPS id 29D69131C16 for <>; Fri, 21 Jul 2017 06:11:49 -0700 (PDT)
Received: from (EHLO ([]) by (MOS 4.3.7-GA FastPath queued) with ESMTP id DLA00888; Fri, 21 Jul 2017 13:11:48 +0000 (GMT)
Received: from ( by ( with Microsoft SMTP Server (TLS) id 14.3.301.0; Fri, 21 Jul 2017 14:11:46 +0100
Received: from ([]) by ([]) with mapi id 14.03.0301.000; Fri, 21 Jul 2017 06:11:43 -0700
From: Leeyoung <>
To: Dieter Beller <>, "" <>
Thread-Topic: [CCAMP] Connectivity-matrix in YANG models for WSON devices
Thread-Index: AQHTAhNiGpWmdPizXUijLmQfE/y8MaJeP8Mg
Date: Fri, 21 Jul 2017 13:11:42 +0000
Message-ID: <>
References: <>
In-Reply-To: <>
Accept-Language: en-US
Content-Language: en-US
x-originating-ip: []
Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E172B3EF2BASJCEML702CHMchi_"
MIME-Version: 1.0
X-CFilter-Loop: Reflected
X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A0B0203.5971FD94.00D5, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32
X-Mirapoint-Loop-Id: 4e6c7914e5c4e8eee25984945f39bd77
Archived-At: <>
Subject: Re: [CCAMP] Connectivity-matrix in YANG models for WSON devices
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: Discussion list for the CCAMP working group <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Fri, 21 Jul 2017 13:11:52 -0000

Hi Dieter,

Please see inline for my comment.


From: CCAMP [] On Behalf Of Dieter Beller
Sent: Friday, July 21, 2017 1:20 PM
Subject: [CCAMP] Connectivity-matrix in YANG models for WSON devices

Hi CCAMPers,

during the joint session an YANG and the CCAMP session yesterday, I commented that the following two drafts are defining a connectivity matrix in the
YANG models for WSON devices:

I was suggesting to have a look at the definition of the connectivity-matrix in and re-use
that definition unless there are good reasons to define the connectivity matrix for WSON devices differently.
YL>> We have not finished the model. We will add a few items to the Conn. Matrix which are physical layer specific information augmentation. I can foresee the ports/interfaces in and out of the device may be associated with FEC/Modulation constraints and other impairment aspect as well. I also foresee within a device, we may have embedded resource pool models, etc. But as you say, anything has defined in the TE-topo will be augmented and we will only describe additional properties peculiar to optical.

Moreover, the connectivity-matrix of a WSON device (e.g. a ROADM) typically reflects the connectivity limitations of the wavelength selective switching
fabric of the device and hence should be read-only (ro) as opposed to read-writable (rw). Why would an operator further restrict  the connectivity
capabilities of a WSON device?
YL>> With the physical data added, there may be administrative issues where some restriction would apply. We don’t have specific use-case at this moment, but leaving +rw may be sensible thing.