Re: [Teas] Microwave Topology - Exporting tunnel as a link

Italo Busi <> Tue, 10 December 2019 16:10 UTC

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From: Italo Busi <>
To: Stephen Cheng <>, ccamp <>
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Thread-Topic: Microwave Topology - Exporting tunnel as a link
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Date: Tue, 10 Dec 2019 16:10:31 +0000
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Subject: Re: [Teas] Microwave Topology - Exporting tunnel as a link
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Hi Stephen,

We have discussed your technical concerns during the TEAS call last Friday and this is the suggestions we have got:

1)      How to model the scenario where a server-layer TE Link (e.g., a MW TE Link) is used by a client-layer non-TE Link (e.g., an IP Link)

The suggestion is to use the L3 TE Link (which augments the IP Link). The L3 TE link can point to the MW TE link.

2)      How to model the scenario where a server-layer TE Tunnel (e.g., an Optical TE Link) is used by a client-layer non-TE Link (e.g., an IP Link)

The TE tunnel has hierarchical TE Link (pointer). The Optical TE tunnel can point to the Packet TE link. The L3 TE link points to the same packet TE link.

3)      How to model Ethernet LAG using the TE Topology YANG model

This is possible but not fully described. We have agreed to provide some description in the TE Tutorial document:

An open issue has been added in github to track this action:


Italo Busi
Principal Optical Transport Network Research Engineer
Huawei Technologies Co., Ltd.
Tel : +39 345 4721946
Email :

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From: Stephen Cheng []
Sent: giovedì 17 ottobre 2019 06:42
To: Italo Busi <>om>; ccamp <>rg>; CCAMP Working Group <>
Subject: Microwave Topology - Exporting tunnel as a link


In previous Microwave Topology meeting, you mentioned that it is possible to export a tunnel in a ietf-te-topology as a link for use in a non ietf-te-topology instance.
I would love to hear your thoughts on how to actually export a tunnel as a link, to allow a non te topology layering over a te topology instance. It certainly is one of my concern on basing microwave l1 topology on te topology.

Stephen Cheng