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PCEP
4.2 Base Implementation of Path Computation
The base implementation of the PCE uses the PCEP extensions defined in RFC
5440.
The main functions of PCEP are:
Table 32
Table 32
310
Elements (PCE)
• PCEP session establishment, maintenance, and closing
• path computation requests using the PCReq message
• path computation replies using the PCRep message
• notification messages (PCNtf) by which the PCEP speaker can inform its peer
about events, such as path request cancellation by the PCC or path computation
cancellation by the PCE
• error messages (PCErr) by which the PCEP speaker can inform its peer about
errors related to processing requests, message objects, or TLVs
lists the base PCEP TLVs, objects, and messages.
Base PCEP TLVs, Objects, and Messages
TLV, Object, or Message
OPEN Object
Request Parameter (RP) Object
NO-PATH Object
END-POINTS Object
BANDWIDTH Object
METRIC Object
Explicit Route Object (ERO)
Reported Route Object (RRO)
LSPA Object
Include Route Object (IRO)
SVEC Object
NOTIFICATION Object
Use subject to Terms available at: www.nokia.com
Contained in
Object
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
© 2022 Nokia.
MPLS Guide
Contained in Message
OPEN, PCErr
PCReq, PCRep, PCErr, PCNtf
PCRep
PCReq
PCReq, PCRep, PCRpt
PCReq, PCRep, PCRpt
PCRep
PCReq
PCReq, PCRep, PCRpt
PCReq, PCRep
PCReq
PCNtf
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