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Cisco ASR 1000 Series Routers: Software Upgrade Processes

Understanding Software Upgrades

This document outlines the software upgrade procedures for Cisco ASR 1000 Series Aggregation Services Routers. It covers In-Service Software Upgrades (ISSU) for both redundant and non-redundant platforms, ensuring minimal disruption to network operations.

Key upgrade modes discussed include consolidated package mode and subpackage mode. The document also details the platforms that support these procedures.

Key Upgrade Procedures

The guide provides detailed steps for performing software upgrades, including:

  • Upgrading ROMMON and IOS simultaneously.
  • Performing consolidated package upgrades in dual Route Processor configurations.
  • Understanding compatibility matrices for various Cisco ASR 1000 Series router platforms.

For detailed information on specific upgrade scenarios and prerequisites, users are encouraged to consult the Cisco Feature Navigator at www.cisco.com/go/cfn.

Important Considerations

The document highlights critical aspects such as ISSU compatibility, the importance of synchronized software versions, and the role of rollback timers in the upgrade process. It also specifies hardware and software prerequisites, including DRAM requirements and the necessity of specific IOS XE release compatibility.

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