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Re: [Status] 答复: 答复: fwd: New Version Notification for draft-xu-rtgwg-global-label-adv-00.txt

Hannes Gredler <hannes@juniper.net> Thu, 25 July 2013 15:29 UTC

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From: Hannes Gredler <hannes@juniper.net>
In-Reply-To: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE081D8C82@NKGEML512-MBS.china.huawei.com>
Date: Thu, 25 Jul 2013 17:28:53 +0200
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References: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE081D6FDB@NKGEML512-MBS.china.huawei.com> <51E90059.1090701@cisco.com> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE081D7077@NKGEML512-MBS.china.huawei.com> <51E9112E.6020803@cisco.com> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE081D73A1@NKGEML512-MBS.china.huawei.com> <51ED124A.7030204@cisco.com> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE081D80C8@NKGEML512-MBS.china.huawei.com> <48BE96C3-7665-4441-A6DE-FA139F78D0F7@juniper.net> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE081D8C55@NKGEML512-MBS.china.huawei.com> <5AF8B30E-E460-480B-83AF-0FBA4A367409@juniper.net> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE081D8C82@NKGEML512-MBS.china.huawei.com>
To: Xuxiaohu <xuxiaohu@huawei.com>
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Cc: "status@ietf.org" <status@ietf.org>, Robert Raszuk <robert@raszuk.net>, Peter Psenak <ppsenak@cisco.com>
Subject: Re: [Status] 答复: 答复: fwd: New Version Notification for draft-xu-rtgwg-global-label-adv-00.txt
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On Jul 25, 2013, at 10:43 AM, Xuxiaohu wrote:
>>> What does the SPT label mean?
>> 
>> an SPT label  is a label inside a label block. the actual label
>> is determined by an index advertised by egress routers.
>> the path to the egress router gets determined using an SPT
>> calculation.
> 
> It uses the trick which has been used by BGP-based VPLS solution. Interesting.

precisely: BGP-VPLS with reversed semantics -

BGP-VPLS use source semantics (where does it come from)
SPT-labels use destination semantics (where does it go to)

/hannes

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