The following PCEP parameters are user-configurable on the PCC:
keepalive timer
A PCEP speaker must send a keepalive message if no other PCEP message is sent to the peer at the expiry of this timer. This timer is restarted every time a PCEP message is sent or the keepalive message is sent.
The keepalive mechanism is asymmetric, which allows each peer to use a different keepalive timer value.
The range of this timer is 1 to 255 seconds and the default value is 30 seconds.
dead timer
This timer tracks the amount of time a PCEP speaker waits after the receipt of the last PCEP message before declaring its peer down.
The dead timer mechanism is asymmetric, which allows each PCEP speaker to propose a different dead timer value to its peer to detect session timeouts.
The range of this timer is 1 to 255 seconds and the default value is 120 seconds.
maximum rate of unknown messages
When the rate of received unrecognized or unknown messages reaches the configured limit, the PCEP speaker closes the session to the peer.
The range of this message rate is 1 to 255 messages per minute and the default value is 10 messages per minute.
session reestablishment and state timeout
If the PCEP session to the PCE goes down, all delegated PCC-initiated LSPs have their state maintained in the PCC and are not timed out. The PCC continues to try reestablishing the PCEP session. When the PCEP session is reestablished, the LSP database is synchronized with the PCE database, and any LSP that went down since the last time the PCEP session was up has its path updated by the PCE.