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Re: [mpls] IPR poll for draft-chen-mpls-source-label

Xuxiaohu <xuxiaohu@huawei.com> Wed, 22 October 2014 06:43 UTC

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From: Xuxiaohu <xuxiaohu@huawei.com>
To: Xuxiaohu <xuxiaohu@huawei.com>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>, Mach Chen <mach.chen@huawei.com>
Thread-Topic: [mpls] IPR poll for draft-chen-mpls-source-label
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Date: Wed, 22 Oct 2014 06:42:48 +0000
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Cc: "draft-chen-mpls-source-label@tools.ietf.org" <draft-chen-mpls-source-label@tools.ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, Ross Callon <rcallon@juniper.net>, "mpls-chairs@tools.ietf.org" <mpls-chairs@tools.ietf.org>
Subject: Re: [mpls] IPR poll for draft-chen-mpls-source-label
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> -----Original Message-----
> From: Xuxiaohu [mailto:xuxiaohu@huawei.com]
> Sent: Wednesday, October 22, 2014 10:39 AM
> To: Carlos Pignataro (cpignata); Mach Chen
> Cc: mpls@ietf.org; draft-chen-mpls-source-label@tools.ietf.org; Ross Callon;
> mpls-chairs@tools.ietf.org
> Subject: RE: [mpls] IPR poll for draft-chen-mpls-source-label
> 
> Hi Carlos,
> 
> > The EL is used for forwarding/dispatch decisions. The SL is metadata,
> > not used for forwarding. The fundamental change to the dataplane is
> > using it to carry metadata.
> 
> In fact, one of other use cases of the SL is to make the MP2P LDP available for
> multicast VPN in the ingress replication mode (For more details, see 6.4.5.
> Ingress Replication of RFC6513). In this use case, the SL is now used for
> forwarding decisions. We could add this use case in the next revision.

To better understand the need for identifying the ingress PE of the received multicast VPN packet by the egress PE in the ingress replication mode,  please refer to section 6.1. of draft-rosen-l3vpn-ir-01 (http://tools.ietf.org/html/draft-rosen-l3vpn-ir-01#section-6.1).

Best regards,
Xiaohu

> Best regards,
> Xiaohu

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