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Re: [Isis-wg] [OSPF] Comments on draft-ietf-isis-segment-routing-extensions-01

Xuxiaohu <xuxiaohu@huawei.com> Tue, 17 June 2014 07:08 UTC

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From: Xuxiaohu <xuxiaohu@huawei.com>
To: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>
Thread-Topic: [Isis-wg] [OSPF] Comments on draft-ietf-isis-segment-routing-extensions-01
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Date: Tue, 17 Jun 2014 07:08:12 +0000
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Subject: Re: [Isis-wg] [OSPF] Comments on draft-ietf-isis-segment-routing-extensions-01
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> > If so, does it mean that the prefix-sid sub-TLV would not be used in the IPv6-SR
> case?
> 
> 
> not at this stage.
> 
> In the future we may come back and revisit the idea of using 32bit SIDs for ipv6
> as well.

Hi Stefano,

What's the motivation for using 32-bit SIDs, rather than 20-bit MPLS labels for IPv6, especially when the GLOBAL MPLS label concept has been explicitly supported by the draft and encapsulating an MPLS label stack into an IPv6-based tunnel (e.g., MPLS-over-GRE) is a very mature technology?

Best regards,
Xiaohu

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