Cisco ASR 9000 Series: The Next Evolution in Edge Routing – From A9K-24X10GE-TR to A9K-24X10GE-SE

Jun 11 , 2025 14

Cisco ASR 9000 Series: The Next Evolution in Edge Routing – From A9K-24X10GE-TR to A9K-24X10GE-SE

Core Upgrade Comparison

Three Key Advancements

1. 25G Migration Path

• Optical-Electrical Multiplexing: Auto-detects 10G/25G optics (requires IOS XR 7.5+)

• FlexE Support: Enables 5x5G network slicing for 5G fronthaul

2. Carrier-Class Reliability

• Hitless Failover: Control plane switch time reduced from <200ms to <50ms

• Modular Power: Supports N+N redundancy (vs. N+1 in TR model)

3. Automation Breakthroughs

• Telemetry Granularity: 100ms real-time streaming (vs. 1-minute polling)

• Predictive Maintenance: Forecasts optic module failures 90 days in advance

Deployment Scenarios

Migration Guide

1. Hardware Compatibility

• Fits existing ASR 9906/9912 slots

• Requires Gen3 backplane upgrade

2. Software Requirements

• Minimum IOS XR 7.3.2

• Recommended: Enable Segment Routing

3. TCO Analysis

• CAPEX: 18% higher unit cost, but 31% lower 5-year TCO

• OPEX: 70% fewer manual interventions

Customer Success Stories

Case 1: Provincial Broadcast Network

• Challenge: TR model couldn’t handle 4K/8K video distribution

• Solution:

• Deployed SE model with 25G mode

• Enabled FlexE for hard isolation

• Results:

• 320% throughput increase

• 4K latency reduced from 35ms to 12ms

Case 2: Global Enterprise Private Network

• Pain Point: IPsec limited cross-border links to <60% utilization

• Fix:

• Upgraded to SE with MACsec

• Implemented Zero-Touch Provisioning

• Outcome:

• 95% encrypted bandwidth utilization

• Site deployment accelerated from 3 days → 2 hours

Future Roadmap

• 2024 Q3: Software upgrade for 50G PAM4 (optic module replacement required)

• 2025: 400G backbone integration with ASR 9900+ series

• 2026: IETF DetNet deterministic networking support

Implementation Advice:
▸ Greenfield deployments: Standardize on SE model
▸ Existing networks: Upgrade during next hardware refresh
▸ Mission-critical nodes: Prioritize SRv6 enablement

Alternative Title Options:

1. "Cisco's Edge Routing Revolution: How A9K-24X10GE-SE Redefines 10G/25G Networks"

2. "From Legacy to Future-Proof: The Complete A9K-24X10GE-TR to -SE Migration Guide"

3. "Performance Unleashed: Cisco's A9K-24X10GE-SE for Next-Gen Carrier Edge"

4. "The 10G to 25G Leap: Why Smart Networks Are Upgrading to A9K-24X10GE-SE"