ASR-9910-LS-BUN: How Does It Enhance Scalability in Cisco’s High-Density Routing Portfolio?

Core Functionality and Design Philosophy

The ​​ASR-9910-LS-BUN​​ is a ​​high-density line card and bundle​​ for Cisco’s ASR 9910 Router, engineered to support ultra-high bandwidth demands in service provider and enterprise core networks. It combines ​​400Gbps per-slot throughput​​ with adaptive queuing mechanisms, making it suitable for environments requiring deterministic performance under traffic congestion.

Technical Capabilities and Deployment Scenarios

Performance Metrics

• ​​Interface Flexibility​​: Supports 1/10/40/100/400G Ethernet, enabling seamless migration from legacy to next-gen infrastructure.
• ​​Buffer Optimization​​: 16 GB shared memory per card for handling microbursts in hyperscale data center interconnects.
• ​​Energy Efficiency​​: 30% lower power consumption compared to the ASR-9906-LS-BUN, achieved through Cisco’s Unified Forwarding Plane architecture.

​​Primary use cases​​ include:

• Tier-1 ISP backbone networks managing multi-terabit traffic.
• Content delivery networks (CDNs) requiring sub-millisecond latency.
• Edge compute hubs supporting AI/ML workloads.

Compatibility and Upgrade Paths

The ASR-9910-LS-BUN is designed exclusively for the ​​Cisco ASR 9910 chassis​​, leveraging its 12-slot design for scalability. It maintains backward compatibility with Cisco IOS XR 7.x software but unlocks full feature parity (e.g., ​​SRv6​​ and ​​Flex Algo​​) in IOS XR 7.8.1+.

Addressing Critical User Questions

Can It Replace Legacy Line Cards Without Downtime?

Yes. The ​​hot-swappable design​​ allows in-service upgrades, while Cisco’s ​​In-Service Software Upgrade (ISSU)​​ minimizes disruption during firmware updates.

How Does It Mitigate Security Risks in High-Traffic Environments?

• ​​Hardware-based MACsec encryption​​ at line rate for all interfaces.
• ​​Telemetry integration​​ with Cisco Crosswork Network Controller for real-time threat detection.
• ​​Dedicated forwarding ASICs​​ isolating control and data planes to prevent exploits.

Procurement and Lifecycle Management

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Final Assessment

Having evaluated its architecture alongside operational benchmarks, the ASR-9910-LS-BUN is a non-negotiable asset for networks prioritizing ​​density without compromise​​. While its upfront cost may deter smaller enterprises, the ROI from reduced operational complexity and energy savings justifies its adoption in hyperscale environments—provided teams have the expertise to harness its full capabilities.