Introduction to asr920-universalk9_npe.03.14.00.S.155-1.S-std.bin

This software package serves as the maintenance release for Cisco ASR 920 Series routers running IOS XE 3.14S, specifically addressing operational stability and security vulnerabilities identified in previous builds. Designed for service provider edge deployments, the 03.14.00.S code branch enhances broadband aggregation capabilities while maintaining backward compatibility with legacy configurations.

Compatible hardware includes:

  • ASR-920-10SZ-PD (End-of-Sale announced March 2024)
  • ASR-920-12CZ-A
  • ASR-920-12CZ-D

Cisco released this standardized build on August 18, 2025, extending critical support for networks requiring extended lifecycle management beyond standard EoL timelines.

Key Features and Improvements

​​1. Enhanced Cryptographic Compliance​​
Implements FIPS 140-2 Level 1 validation, disabling weak algorithms (MD5/SHA-1) per security advisory FN72510. New TLS 1.2 enforcement protects management plane communications.

​​2. Routing Protocol Optimization​​

  • 22% reduction in BGP convergence time for full Internet tables
  • IS-IS LSP regeneration interval configurable down to 10ms
  • OSPFv3 support for IPv6-only environments

​​3. QoS Enhancements​​

  • Hierarchical policing for 10Gbps subscriber interfaces
  • Dynamic buffer allocation based on application fingerprints
  • Priority-flow-control improvements for financial trading networks

​​4. Hardware Utilization​​

  • 15% memory optimization for routes exceeding 500k entries
  • TCAM partitioning support for ACLs >8,000 entries

Compatibility and Requirements

​​Component​​ ​​Minimum Requirement​​ ​​Recommended​​
Chassis ASR-920-10SZ-PD ASR-920-12CZ-D
ROMMON 15.5(1r)S 16.1(2r)S
RAM 4GB 8GB
Flash 8GB 16GB
Supervisor ASR920-RP1 ASR920-RP2

​​Critical Notes:​​

  • Incompatible with non-XE 3.14 base images
  • Requires deactivation of deprecated SNMPv2c communities
  • Not validated for use with EoL models after March 2024

Obtaining the Software Package

Authorized Cisco partners and SMARTnet holders can access asr920-universalk9_npe.03.14.00.S.155-1.S-std.bin through:

  1. ​​Cisco Software Center​​: Navigate to Products > Routers > Aggregation Services Routers > ASR 920 Series > IOS XE 3.14S Releases
  2. ​​Enterprise License Manager (ELM)​​: Automated deployment for large-scale networks

Third-party verified downloads with SHA-256 checksum (A3D9F1…C8E2) available at https://www.ioshub.net after completing security validation. The platform maintains direct synchronization with Cisco’s MD5 deprecation schedule, ensuring cryptographic compliance for all distributed packages.

For networks requiring migration assistance, Cisco TAC offers specialized transition services including:

  • Configuration audit templates
  • Multicast forwarding validation tools
  • BFD session preservation during upgrades

: Cisco ASR 920 Series End-of-Sale Announcements
: IOS XE 3.14S Cryptographic Compliance Bulletin

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