Figure 41: Example Pce-Initated Lsp For Mpls Rsvp-Te - Juniper ACX1000 Configuration Manual

Copyright © 2017, Juniper Networks, Inc.
When configuring the support of PCE-initiated LSPs for a PCC, be aware of the following
considerations:
Junos OS Release 13.3 supports only stateful PCEs.
For Junos OS Release 13.3, the PCC always initiates the PCEP sessions. PCEP sessions
initiated by remote PCEs are not accepted by the PCC.
Existing LSP features, such as LSP protection and make-before-break, work for
PCE-initiated LSPs.
PCE-initiated LSPs do not support graceful Routing Engine switchover (GRES).
PCE-initiated LSPs under logical systems are not supported.
PCE-initiated LSPs cannot be point-to-multipoint LSPs.
Bidirectional LSPs are not supported.
RSVP-TE for unnumbered links is not supported. PCE-initiated LSPs support only
numbered links.
Topology

Figure 41: Example PCE-Initated LSP for MPLS RSVP-TE

lo0=192.168.69.58
PCE1
PCE2
lo0=192.168.70.65
In this example, PCC is the ingress router that connects to two external stateful PCEs:
PCE1 and PCE2.
When there is a new demand, the active stateful PCE dynamically initiates an LSP to
meet the requirement. Since PCC is configured with the capability of supporting the
PCE-initiated LSP, path computation on PCC is performed as follows:
A PCE sends a PCCreate message to the PCC to initiate and provision an LSP. The
1.
PCC sets up the PCE-initiated LSP using the parameters received from the PCE, and
automatically delegates the PCE-initiated LSP to the PCE that initiated it.
In this example, PCE1 is the active stateful PCE that initiates and provisions the
PCE-initiated LSP on PCC. On receiving the PCE-initiated LSP parameters, PCC sets
up the LSP and automatically delegates the PCE-initiated LSP to PCE1.
When the PCEP session between PCC and PCE1 is terminated, PCC starts two timers
2.
for the PCE1-initiated LSP: delgation cleanup timeout and the LSP cleanup timer.
During this time, PCE1 or PCE2 can acquire control of the PCE-initiated LSP.
Chapter 23: Configuring Path Computation Element Protocol (PCEP)
lo0=192.168.12.1 lo0=192.168.10.1
PCC R1
10.0.102.10
ge-3/ 1/1
ge-0/1/1
10.0.102.9
ge-0/1/3
10.0.112.14
lo0=192.168.11.1
R2
10.0.101.9
ge-3/ 1/2
ge-0 / 1/2
10.0.101.10
ge-0/1/3
10.0.112.13
723