A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Multi-Segment Pseudowire Setup and Maintenance
using LDP
Author(s) : F. Balus, et al.
Filename : draft-balus-mh-pw-control-protocol-02.txt
Pages : 23
Date : 2005-7-18
[MS PWE3 Requirements] describes the requirements to allow a service
provider to extend the reach of pseudo-wires across multiple
domains. A Multi-Segment PW is defined as a set of two or more
contiguous PW segments that behave and function as a single point-
to-point PW.
The current specification of the PW Architecture [PW ARCH] defines
the PW as a single Segment entity, connecting the Attachment
Circuits between two Ultimate PEs (U-PE). The current procedures for
establishing a single segment PW (SS-PW) is described in [PW
Control], where typically an LDP session is established between the
ultimate PEs handling the Pseudowire End Service (PWES). No
intermediate nodes, between the PEs, are aware of the PW.
The purpose of this draft is to specify new LDP extensions, end to
end signaling procedures to address the related requirements
specified in [MS-PWE3 Requirements]. The proposed procedures follow
the guidelines defined in [RFC3036bis] and enable the usage of
addressing schemes (L2FECs) and other TLVs already defined for PWs
in [PW Control].
The solution described in the draft provides a MS-PW Operational
Model, Signaling Procedures consistent with the regular (SS-)PWs, in
order to enable seamless implementation, deployment. The resulting
MS-PW building blocks accommodate and enhance LDP-VPLS, VPWS
solutions with minimal changes in the Information Models and
Software Modules related to the L2VPN functionality.
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