Technical Summary
This document specifies extensions to the Label Distribution Protocol
(LDP) for the setup of point-to-multipoint (P2MP) and multipoint-to-
multipoint (MP2MP) Label Switched Paths (LSPs) in Multi-Protocol
Label Switching (MPLS) networks. LDP with these extensions is also
referred to as Multipoint LDP (mLDP).
Runing mLDP will result in establishing P2MP or MP2MP LSPs
without interacting with or relying upon any other multicast tree
construction protocol. Protocol elements and procedures for this
solution are described for building such LSPs in a receiver-initiated
manner. There can be several applications for P2MP/MP2MP LSPs,
but these are outside the scope of this document.
Working Group Summary
The document has been reviewed by the MPLS working group.
There is no controversy and consensus seems good.
Document Quality
All major MPLS vendors have either already implements or have
indicated intention to implement.
Personnel
Loa Andersson (loa@li.nu) is the Document Shepherd.
Adrian Farrel (adrian@olddog.co.uk) is the Responsible AD
RFC Editor Note
Section 1.1
Please add the following new paragraph to the end of the section.
All new fields shown as "reserved" in this document MUST be set to zero on transmission and MUST be ignored on receipt.
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Section 1.2
Add to the list.
FEC: Forwarding Equivalence Class
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Section 1.2 (CRC entry)
s/V.42/V.42 [ITU.V42.1994]/
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NEW
1.3. Manageability
MPLS LSRs can be modeled and managed using the MIB module defined in
[RFC3813]. That MIB module is fully capable of handling the one-to-
many in-segment to out-segment relationships needed to support P2MP
LSPs, and no further changes are required.
[RFC3815] defines managed objects for LDP. The MIB module allows the
modeling and management of LDP and LDP speakers for the protocol as
defined in [RFC5036]. The protocol extensions defined in this
document to support P2MP in LDP may require an additional MIB module
or extensions to the modules defined in [RFC3815]. This is for future
study, and at the time of writing no interest had been expressed in
this work.
Future manageability work should pay attention to the protocol
extensions defined in this document, and specifically the
configurable and variable elements, along with reoprting the new
protocol fields that identify individual P2MP LSPs.
END
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Section 5.2.2
s/RFC3036/[RFC5056]
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Section 10
s/configure/configured
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Section 14.2
Add to the start...
[RFC3813] Srinivansan, C., Viswanathan, A., and T. Nadeau,
"Multiprotocol Label Switching (MPLS) Label Switching
Router (LSR) Management Information Base (MIB)", RFC
3813, June 2004
[RFC3815] Cucchiara, J., Sjostrand, H., and Luciani, J.,
"Definitions of Managed Objects for the Multiprotocol
Label Switching (MPLS) Label Distribution Protocol (LDP)",
RFC 3815, June 2004.