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MPLS Guide
4.4 PCEP Parameters
The following PCEP parameters are user-configurable on the PCC:
4.4.1 PCC Configuration
The following PCC parameters can be modified while the PCEP session is
operational:
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• 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, meaning that each peer can 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, meaning that each PCEP speaker
can propose a different dead timer value to its peer to use 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 re-establishing the PCEP session. When the PCEP session is
re-established, 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.
• report-path-constraints
• unknown-message-rate
Use subject to Terms available at: www.nokia.com
© 2022 Nokia.
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