SR OS sends the RP-announce messages by default every 60 seconds with the holdtime that is configured for the candidate-RP, set to 150 seconds. The default time of 60 seconds for the RP-announce messages can be modified by changing the RP-candidate holdtime ((holdtime)*2)/5).
SR OS sends the RP-mapping messages by default every 60 seconds with the holdtime set to 181 seconds. The default time of 60 seconds for the RP-mapping messages is fixed and cannot be modified.