Cisco Cisco Packet Data Interworking Function (PDIF) Guía De Administador
Interchassis Session Recovery
▀ Updating the Operating System
▄ Cisco ASR 5500 System Administration Guide
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Updating the Operating System
Updating the operating system (StarOS™) on ICSR chassis requires performing an Off-line update of each chassis
while it is standby mode. Traffic disruption is minimal since an active chassis will be handling call sessions while the
standby chassis is being updated.
while it is standby mode. Traffic disruption is minimal since an active chassis will be handling call sessions while the
standby chassis is being updated.
The general upgrade sequence is as follows:
Download the StarOS software image and copy/transfer it to both chassis.
Save the currently running configurations on both chassis.
Update the standby backup chassis first.
Initiate an SRP switchover from the active primary chassis to make the standby backup chassis active.
Update the standby primary chassis.
Initiate an SRP switchover from the active backup chassis to make the standby primary chassis active.
The four-part flowchart below shows a more complete view of all the procedures required to complete the StarOS
upgrade process.
upgrade process.
Caution:
Enabling the Demux on MIO/UMIO feature changes resource allocations within the system. This
directly impacts an upgrade or downgrade between StarOS versions in ICSR configurations. Contact Cisco TAC for
procedural assistance prior to upgrading or downgrading your ICSR deployment.
procedural assistance prior to upgrading or downgrading your ICSR deployment.