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Re: [i2rs] network-type: container vs. identity?

Xufeng Liu <xliu@kuatrotech.com> Tue, 12 July 2016 17:09 UTC

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From: Xufeng Liu <xliu@kuatrotech.com>
To: Robert Varga <nite@hq.sk>, "Alexander Clemm (alex)" <alex@cisco.com>, "Zhangxian (Xian)" <zhang.xian@huawei.com>, "draft-ietf-i2rs-yang-network-topo@tools.ietf.org" <draft-ietf-i2rs-yang-network-topo@tools.ietf.org>
Thread-Topic: [i2rs] network-type: container vs. identity?
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Date: Tue, 12 Jul 2016 17:09:18 +0000
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Cc: "i2rs@ietf.org" <i2rs@ietf.org>
Subject: Re: [i2rs] network-type: container vs. identity?
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We do have a case for a topology that has multiple "topology types": we are defining a topology-type "sr-topoloyg" which is derived from "l3-unicast-igp-topology". We are also defining a topology of type "SR TE topology", which type is both "sr-topology" and "te-topology", hence multiple-inheritance is needed. 

Thanks,

- Xufeng

> -----Original Message-----
> From: Robert Varga [mailto:nite@hq.sk]
> Sent: Tuesday, July 12, 2016 12:54 PM
> To: Alexander Clemm (alex) <alex@cisco.com>; Zhangxian (Xian)
> <zhang.xian@huawei.com>; draft-ietf-i2rs-yang-network-topo@tools.ietf.org
> Cc: i2rs@ietf.org
> Subject: Re: [i2rs] network-type: container vs. identity?
> 
> On 07/12/2016 06:29 PM, Alexander Clemm (alex) wrote:
> > Per Robert's point, if for some reason you have multiple traits and want to
> "compose" a network to encompass multiple types, this is straightforward to do
> with the current pattern, not so straightforward with identities.
> 
> There is also an issue of consistency within the models. While it may not be
> obvious to have more 'topology types', it certainly makes sense for nodes within
> a topology -- for example in ODL we tag topology nodes with capabilities based
> on the southbound protocol (like PCEP, OpenFlow, NETCONF).
> 
> Bye,
> Robert

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