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CPU core auto switch
- Thread starter motox2
- Start date
Firebird Scrambler
Systems Engineer
Nortel Communication Server 1000 System Redundancy Fundamentals NN43001-507 02.09 refers:
Midnight Switchovers.
Because of the robustness of the new call processor architecture, the need to perform CPU switchovers during midnight routines are no longer required and have been removed from the software routine. With Call
Processor PII and Call Processor PIV, both CPUs are alive (although only one is in call processing state).
It is still possible to have a daily switchover of the CPUs during the midnight routine if so desired. The following steps are required to provision this:
• If the customer can tolerate a service interruption of 6 to 10 seconds during the daily diagnostic routines which are normally scheduled outside of business hours (nominally “midnight”), and if the system is monitored daily or in real time for critical alarms, then the daily scheduled switchover of active CP side is recommended.
• If the customer cannot tolerate a daily scheduled diagnostic test, then a CP side switchover test should be conducted during a scheduled maintenance window at least once a year, and preferable monthly or quarterly.
• Never switching active CP side is not recommended, because a hardware fault on the inactive standby CP side may not be discovered until the active side experiences a hardware failure, a power failure, or a network connection failure.
These recommendations apply to all dual processor machines.
MIDN, MID_SCPU, SWAP
Firebird Scrambler
Nortel & Avaya Meridian 1 / Succession & BCM / Norstar Programmer
Website = linkedin
Midnight Switchovers.
Because of the robustness of the new call processor architecture, the need to perform CPU switchovers during midnight routines are no longer required and have been removed from the software routine. With Call
Processor PII and Call Processor PIV, both CPUs are alive (although only one is in call processing state).
It is still possible to have a daily switchover of the CPUs during the midnight routine if so desired. The following steps are required to provision this:
• If the customer can tolerate a service interruption of 6 to 10 seconds during the daily diagnostic routines which are normally scheduled outside of business hours (nominally “midnight”), and if the system is monitored daily or in real time for critical alarms, then the daily scheduled switchover of active CP side is recommended.
• If the customer cannot tolerate a daily scheduled diagnostic test, then a CP side switchover test should be conducted during a scheduled maintenance window at least once a year, and preferable monthly or quarterly.
• Never switching active CP side is not recommended, because a hardware fault on the inactive standby CP side may not be discovered until the active side experiences a hardware failure, a power failure, or a network connection failure.
These recommendations apply to all dual processor machines.
MIDN, MID_SCPU, SWAP
Firebird Scrambler
Nortel & Avaya Meridian 1 / Succession & BCM / Norstar Programmer
Website = linkedin
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