Using LDP Multipoint Extensions on Targeted LDP Sessions

Abstract

Label Distribution Protocol (LDP) can be used to set up Point-toMultipoint (P2MP) and Multipoint-to-Multipoint (MP2MP) Label Switched Paths. However, the specification for the Multipoint Extensions to LDP presupposes that the two endpoints of an LDP session are directly connected. The LDP base specification allows for the case where the two endpoints of an LDP session are not directly connected; such a session is known as a "Targeted LDP" session. This document provides the specification for using the LDP Multipoint Extensions over a Targeted LDP session.

Pioneirismo na educação profissional tecnológica em Design Gráfico no Brasil: a criação do Curso Superior de Tecnologia em Design Gráfico do Cefet-PE e a experiência da primeira turma

“…Propõe-se encaminhar ao MEC recomendação no sentido de incentivar a criação e o aperfeiçoamento de cursos técnicos à nível de 2º grau, que habilitam o aluno para as técnicas de representação e detalhamento do projeto, ou seja, à formação de técnicos de nível médio que trabalhem sob a coordenação e supervisão de designers. Deve-se deixar claro, contudo, que tais cursos não habilitam à prática de projeto (Carta de Canasvieiras, 1989).…”

Multipoint Label Distribution Protocol In-Band Signaling in a Virtual Routing and Forwarding (VRF) Table Context

“…The mLDP Label Mapping message is then sent by PE1 on its LDP session to the "next hop" on the message's path to the upstream PE. The "next hop" is usually the directly connected next hop, but see [RFC7060] for cases in which the next hop is not directly connected.…”

Multipoint LDP (mLDP) Node Protection

“…The solution described in this document notifies the PLR(s) of the MPT LSR(s) via signaling using a Targeted LDP (tLDP) session [RFC7060]. By having a tLDP session with the PLR, no additional procedures need to be defined in order to support Make-Before-Break (MBB), Graceful Restart (GR), and Typed Wildcard Forwarding Equivalence Class (FEC).…”

“…Using the tLDP Session The receipt of a PLR MP Status (with PLR addresses) for an MP LSP on a receiving LSR makes it an MPT for node protection. If not already established, the MPT LSR MUST establish a tLDP session with all of the learned PLR addresses using the procedures as documented in[RFC7060].UsingFigure 1as the reference topology, let us assume that both LSR2 and LSR3 are MPTs and have established a tLDP session with the PLR being LSR1. Assume that both LSR2 and LSR3 have a FEC <R,X> with an upstream LSR N and label Ln assigned to FEC towards N. The MPTs will create a secondary upstream LSR for the FEC <R,X> (using the received PLR address) and assign label Lpx to it.…”