OcNOS-SP : Troubleshooting Guide : Segment Routing : Path Computation Element Communication Protocol (PCEP)
Path Computation Element Communication Protocol (PCEP)
 
Symptom/Cause
Solution
PCEP session not coming up
Use this command:
"show pcep peer" to check the session state.
 
1. Make sure peer-address configured should be reachable and matches with the server IP.
2. Enable "debug pcep error" to see any error's received/sent for session establishment, based on error log, take appropriate action.
Ex: Capability mismatch.
3. Check any "Session Connect due" running in "show pcep peer". After this due we again retry for PCEP session.
Stateless/Passive stateful PCEP configured on SR/RSVP - Path not coming up.
1.This case can happen when controller send PcReply with NO-PATH object, so check the constraints configured on particular RSVP-TRUNK or SR-POLICY.
2.ERO Received in the PcReply not valid. "show rsvp session details" use this show command to check the error.
3.Similarly for SR check "show segment-routing policy detail" for CP state.(Valid/Invalid).
Active stateful PCEP configured on SR/RSVP - Path not coming up.
Use this command:
show segment-routing policy detail
In case of SR-POLICY SR-ERO received in PcInitiate/PcUpdate not valid.
 
Use this command:
show rsvp session details
In case of RSVP the ERO received PcInitiate/PcUpdate not valid.
Last modified date: 06/08/2023