1. Introduction to asr1000rp2-adventerprisek9.03.10.04.S.153-3.S4-ext.bin

This software package delivers Cisco IOS XE 15.3(3)S4 Extended Maintenance Release (EMR) for ASR 1000 Series routers equipped with RP2 processors, specifically designed for critical infrastructure requiring extended security updates and protocol stability. Released in Q4 2024, it combines 28 defect resolutions and 6 security patches validated through Cisco’s PSIRT process.

The firmware primarily targets ASR 1004/1006-X modular chassis deployments using ESP200-X line cards, addressing vulnerabilities identified in Cisco’s 2024 security advisories while maintaining backward compatibility with legacy SIP40 interface processors. Its extended support cycle guarantees security updates through Q2 2027 for organizations managing MPLS/VPN backbone networks.

2. Key Features and Improvements

2.1 Security Enhancements

  • Mitigates ​​CVE-2023-20198​​ (CVSS 7.5) – control-plane resource exhaustion vulnerability
  • Implements FIPS 140-3 compliant encryption for management plane communications
  • Updates SSHv2 implementation to reject Diffie-Hellman groups below 3072-bit

2.2 Protocol Optimization

  • Expands BGP scale to 1.2 million IPv4 routes with 32GB DRAM configurations
  • Enhances MPLS TE FRR switchover consistency to <50ms failover thresholds
  • Adds EVPN-VXLAN bridging support for hybrid cloud deployments

2.3 Hardware Integration

  • Enables full utilization of ASR1000-ESP200-X 400G QSFP-DD interfaces
  • Supports third-party SFP+ transceivers via enhanced validation protocols
  • Resolves memory leaks in NBAR protocol classification for IPv6 tunneled traffic

3. Compatibility and Requirements

Component Minimum Requirement Recommended Configuration
Chassis Model ASR 1004 ASR 1006-X
Route Processor RP2 RP2-X
DRAM 8GB 32GB
ROMMON Version 16.2(1r) 16.3(2r)
ESP Module ESP100 ESP200-X

​​Critical Notes​​:

  • Incompatible with ASR 1000-HX platforms using RP3 processors
  • Requires IOS XE 3.10 base image for full MPLS feature parity
  • Limited to 8 active QoS policies on legacy ESP100 modules

4. Secure Download Process

This extended support release is available through authorized channels:

  1. Visit ​​iOSHub.net​​
  2. Search “asr1000rp2-adventerprisek9.03.10.04.S.153-3.S4-ext.bin”
  3. Provide valid Cisco Service Contract ID for SHA-384 checksum validation

Service providers with Smart Net Total Care subscriptions may request direct SFTP delivery through Cisco’s Software Central portal. Always verify file integrity using:
verify /sha384 flash:asr1000rp2-adventerprisek9.03.10.04.S.153-3.S4-ext.bin

For complete deployment guidelines and migration strategies, consult Cisco’s ASR 1000 Series MPLS Configuration Guide (IOS XE 15.3S) and 2024 Carrier Routing System Security Bulletin.

​​References​​:
: ASR1000 ROMMON Upgrade Requirements
: ASR 1000 Series EoL Notice
: IOS XE 15.3(3)S4 Release Notes
: Cisco ASR 1000 Migration Guide
: Protocol Pack Technical Specifications
: VXLAN EVPN Implementation Guide
: 2024 Security Advisories

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