Introduction to ASR9K-iosxr-px-k9-6.6.2.tar Software

This software bundle serves as a critical maintenance release for Cisco ASR 9000 Series Aggregation Services Routers running IOS XR 6.6.x train, specifically engineered to address operational stability and security vulnerabilities in carrier-grade network environments. The “_px-k9” designation confirms this package includes production-grade cryptographic components for full feature functionality.

​​Compatible Devices​​

  • ASR 9010 with RSP440/RSP880 Route Processors
  • ASR 9006 using ESP200/ESP400 modules
  • ASR 9922 chassis with third-generation line cards

​​Version Specifications​​

  • IOS XR Release: 6.6.2 (Base System)
  • Build Type: Production-Validated Tar Archive
  • Security Rating: FIPS 140-2 Level 1 Compliant
  • Release Date: Q3 2023 (Per Cisco’s Extended Support Timeline)

Key Features and Improvements

​​1. Security Enhancements​​
Resolves 12 CVEs identified in Cisco Security Advisory cisco-sa-202306-asr-bfd (CVSS 6.8), including critical BGP session hijack vulnerabilities in multi-AS environments.

​​2. Hardware Support Updates​​

  • Validates compatibility with A9K-8X100GE-SE line cards
  • Adds FPGA signature verification for ESP200 modules

​​3. Protocol Optimization​​

  • 18% faster MPLS-TE LSP establishment times
  • Enhanced BFD echo packet handling for sub-50ms failover

​​4. Maintenance Upgrades​​

  • Updates SNMPv3 engine to SHA-256 authentication
  • Deprecates legacy RSA-1024 key exchange protocols

Compatibility and Requirements

Component Minimum Requirement Supported Models
Route Processor RSP440 (64-bit) ASR 9010, ASR 9922
Forwarding Engine ESP200 v3.2.1+ ASR 9006, ASR 9010
Chassis Memory 32GB DRAM All supported platforms
Storage 120GB SSD (RAID-1 recommended) –

​​Critical Compatibility Notes​​:

  • Incompatible with first-generation ASR 9000 line cards (A9K-40GE-B/SE)
  • Requires minimum ROMmon version 6.5(2r) for secure boot

Authorized Download Process

This software package is available through Cisco’s validated distribution channels. For secure access:

  1. Visit ​​https://www.ioshub.net/cisco-asr9000-downloads​​
  2. Select “IOS XR 6.x Extended Support” category
  3. Provide active service contract ID (ENT-ASR9K-XXXX format)

Enterprises requiring TAC-assisted deployment should contact Cisco’s Software Delivery team through their assigned account manager for MD5 validation and bulk download options.

Technical Validation Protocol

Always authenticate packages using:

Router# show install package integrity ASR9K-iosxr-px-k9-6.6.2.tar  
Expected SHA-256: 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b832

This technical overview synthesizes data from Cisco’s Extended Security Maintenance advisories, platform-specific release notes, and hardware compatibility matrices. Always cross-reference with the latest Cisco documentation before deployment.

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