Re: [spring] 答复: Genart last call review of draft-ietf-spring-ipv6-use-cases-10

Hi,

Can you point me to any SRv6 document mandating that such mapping MUST be
done in a routing protocol ?

Thx,
R.

On May 9, 2017 05:16, "Xuxiaohu" <xuxiaohu@huawei.com> wrote:

Hi Robert,

Except the function indicated by all zeros, it does require mappings
between functions, function indications and locators. Take tenant network
function as an exampleJ

Best regards,

Xiaohu

*发件人:* spring [mailto:spring-bounces@ietf.org] *代表 *Robert Raszuk
*发送时间:* 2017年5月8日 20:13
*收件人:* Stewart Bryant
*抄送:* spring@ietf.org; IETF Discussion; gen-art@ietf.org;
draft-ietf-spring-ipv6-use-cases.all@ietf.org; stefano previdi; Alvaro
Retana (aretana)
*主题:* Re: [spring] Genart last call review of draft-ietf-spring-ipv6-use-
cases-10

Hi Stewart,

> 

Yes, but those are required anyway to support SRv6

That is incorrect.

Please watch Les's presentation during last IETF where he clearly and
correctly stated that IGP extensions for SRv6 are optional and not required
(unlike in the case of SR-MPLS where such signalling of global labels is
indeed necessary to build "global labels" based forwarding).

As a matter of fact I knew this will generate confusion in IETF and
recommended to make it very clear in the drafts. Distribution of SID
functions does not need to be carried in routing protocols. And SRv6 SID
locator function is native to IPv6 routing hence no extensions needed. Sure
they can be carried in IGPs or BGP but this is just an option not
necessity.

Best,

Robert.

On Mon, May 8, 2017 at 12:15 PM, Stewart Bryant <stewart.bryant@gmail.com>
wrote:

On 05/05/2017 11:17, Robert Raszuk wrote:

And to add one observation ..

Stewart makes a point that SR-MPLS can be deployed without mpls control
plane.

Well it sure does not require LDP however IGP or BGP extensions for SR-MPLS
signalling is also an example of mpls control plane ... even if much
simpler than traditional cases it is still required.

Yes, but those are required anyway to support SRv6. You always have to
provide the mapping between the function, the function identifier and the
function location.

- Stewart

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