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Cisco ASR 9000 Series: A9K-4X100GE-TR – High-Performance 100G Port Adapter
Jun 11 , 2025 82

Cisco ASR 9000 Series: A9K-4X100GE-TR – High-Performance 100G Port Adapter


A9K-4X100GE-TR


Product Overview

The Cisco A9K-4X100GE-TR is a high-density 100 Gigabit Ethernet (100GE) port adapter designed for the Cisco ASR 9000 Series routers. It provides 4x 100G QSFP28 ports in a single slot, making it ideal for service provider edge, cloud peering, and data center interconnect (DCI) applications.

Key Features & Specifications

FeatureSpecification
Port Configuration4x 100G QSFP28 (breakout to 4x25G or 4x10G)
Forwarding Capacity400Gbps (full duplex)
Supported ProtocolsIPv4/IPv6, MPLS, VPLS, L2VPN, L3VPN
EncryptionMACsec (optional)
Power Consumption~150W (typical)
Latency<5μs (cut-through switching)
CompatibilityASR 9901/9904/9906/9910/9912/9922

Use Cases

✔ Service Provider Edge – High-speed aggregation for 5G backhaul
✔ Cloud & Hyperscaler Interconnect – Low-latency 100G peering
✔ Enterprise Core Routing – High-performance WAN connectivity

Next-Generation Successor: A9K-4X100GE-SE

As networks evolve toward 400G and beyond, Cisco introduced the A9K-4X100GE-SE as the direct successor to the A9K-4X100GE-TR.

Key Upgrades & Improvements

FeatureA9K-4X100GE-TRA9K-4X100GE-SEImprovement
Port Flexibility100G onlySupports 100G/400G (via QSFP-DD)Future-proofing
Switching Capacity400Gbps800Gbps (with virtualization)2x throughput
Power Efficiency150W100W33% reduction
Latency<5μs<3μs40% lower
EncryptionOptional MACsecHardware-accelerated MACsec (200Gbps)4x faster
Protocol SupportMPLS, VPLSAdds SRv6, EVPN, VXLANCloud-ready

Why Upgrade to the -SE Model?

✔ 400G Readiness – Supports next-gen QSFP-DD optics
✔ Lower TCO – Reduced power and cooling costs
✔ Enhanced Security – Line-rate MACsec encryption
✔ Cloud & 5G Optimized – Supports Segment Routing (SRv6)

Migration Recommendations

  1. New Deployments → Choose A9K-4X100GE-SE for future scalability.

  2. Existing -TR Users → Upgrade during hardware refresh cycles.

  3. Critical Networks → Prioritize -SE for low-latency & high-security needs.

"The A9K-4X100GE-SE isn’t just an upgrade—it’s a strategic leap toward next-gen networking."
**— Cisco ASR 9000 Product Manager**

Conclusion

The A9K-4X100GE-TR remains a solid choice for 100G deployments, but the A9K-4X100GE-SE delivers higher performance, efficiency, and future-proofing for 400G-ready networks.

Next Steps:
▸ Evaluate power/cooling requirements
▸ Test interoperability with existing optics
▸ Consult Cisco for trade-in options



Tags: linecard cisco A9K-4X100GE-TR

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