Cisco ASR 5500 System Administration Manual page 314

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Interchassis Session Recovery

Updating the Operating System

Enabling the Demux on MIO/UMIO/MIO2 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.

Figure 12: ICSR Software Upgrade – Part 1

ASR 5500 System Administration Guide, StarOS Release 21.5

Troubleshooting