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[mpls] comments on draft-ietf-mpls-ldp-p2mp-01

  • From: jin.lizhong@zte.com.cn
  • Date: Thu, 19 Oct 2006 10:17:18 +0800
  • Cc: mpls@lists.ietf.org
  • X-Mailman-Approved-At: Fri, 20 Oct 2006 12:03:36 -0400
  • X-MIMETrack: Serialize by Router on notes_smtp/zte_ltd(Release 6.5.4|March 27,2005) at 2006-10-19 10:17:16,Serialize complete at 2006-10-19 10:17:16


Hi, all

I read the draft-ietf-mpls-ldp-p2mp-01 and have some questions.

In section 2.1
In which situation will the opaque value contains more than one LDP MP Opaque Value Elements?

In section 4.1
Does such a wildcard MP2MP FEC exist with only Opaque length set to 0, which is for matching root node address.

In this draft, why wildcard P2MP FEC is not mentioned.

In section 5
"P2MP and MP2MP Downstream wildcard FEC may appear only in Label Request, Label Withdraw and Label Release messages."
I do not think Label Request will be used with P2MP and MP2MP Downstream wildcard FEC, for P2MP/MP2MP LSP is initialized by
leaf node. And when will the upstream node send Label Request to the downstream node?

"MP2MP Upstream wildcard FEC may appear only in Label Withdraw and Label Release messages."
When the leaf node initialized the MP2MP LSP, it may or may not send Label Request Message with MP2MP Upstream wildcard FEC.
However it is reasonable to send Label Request Message with MP2MP Upstream wildcard FEC, for it is issued by the leaf node.
Then MP2MP Upstream wildcard FEC may appear in Label Request.

Maybe I have missed some key point. Thanks!

Best Regards
Jin.lizhong
ZTE

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