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H3C Core Switch Dual Control Cards

Fiber and communications infrastructure knowledge brief Published 17 Jan 2022

Prepared for preliminary research by the ALFA PRO knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

H3C core switches, such as the S7500X series, support dual control cards to provide high availability, redundancy, and seamless network management. Overview of Dual Control Card ArchitectureH3C core switches like the S7500X series adopt a modular design with support for dual control cards, which ensures non-stop forwarding and high availability. The dual control cards operate in a hot standby configuration, where one card actively manages the control plane while the other remains on standby, ready to take over instantly in case of failure.

This eliminates single points of failure and ensures continuous network operation.

Key Benefits

High Availability (HA): Patented hot standby technology allows the standby control card to immediately take over, maintaining uninterrupted data forwarding and control plane operations. Redundancy and Load Distribution: Dual control cards, combined with IRF2 (Intelligent Resilient Framework version 2), enable multi-chassis link aggregation, improving redundancy, load sharing, and link utilization across multiple switches. Simplified Management: The system can be managed via a single IP address for the entire IRF fabric, reducing operational complexity and maintenance costs.

Service Continuity: MDC (Multitenant Device Context) virtualization allows one physical switch to operate as multiple logical switches, ensuring service isolation and maximizing switch utilization.

Technical Features

Line Card Support: The S7500X series supports high-density 10G, 40G, and 100G line cards, ensuring wire-speed performance for demanding enterprise applications. Virtualization: IRF2 can virtualize up to four S7500X switches into a single logical fabric, enhancing scalability and resilience. Advanced Networking: Supports Layer 2/3 features, VXLAN, EVI, MP-BGP EVPN, and MACsec encryption, providing secure and flexible core network deployment.

Practical Implications

Deploying dual control cards in H3C core switches ensures that critical enterprise networks remain operational even during hardware failures, supports high-density traffic, and simplifies network management. This architecture is ideal for data centers, large enterprise cores, and high-availability campus networks. In summary, H3C core switches with dual control cards provide robust redundancy, high availability, and simplified management, making them suitable for mission-critical network environments.

H3C Core Switch Dual Control Cards - ALFA PRO COMMUNICATION SYSTEMS (Pty) Ltd [PDF]

H3C Core Switch Dual Control Cards

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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