Huawei Multi-Aggregation Switch Networking

Huawei aggregation switches provide high-density, high-performance connectivity with advanced link aggregation, M-LAG, and Layer 2/3 gateway capabilities for campus and data center networks.

Overview of Huawei Aggregation Switches

Huawei aggregation switches, such as the S6720S and CloudEngine S12700H series, are designed to serve as core or aggregation nodes in campus and data center networks. They offer high port density with GE, 10GE, 25GE, 40GE, and 100GE interfaces, supporting both Layer 2 and Layer 3 gateway functions. These switches are optimized for high-performance, scalable, and reliable networking, enabling simplified campus architectures and cloud-ready deployments .

Link Aggregation and Eth-Trunk

Huawei switches support Ethernet link aggregation, which combines multiple physical links into a single logical link (Eth-Trunk) to increase bandwidth, enhance reliability, and implement load balancing. Link aggregation can operate in:

• Manual mode: All member links actively forward traffic; suitable when the remote device does not support LACP. Requires identical interface type, rate, duplex, and flow control on both ends .
• LACP mode: Provides dynamic link negotiation, fault tolerance, and backup links. Active links forward traffic while backup links replace failed links automatically . Proper configuration ensures inter-VLAN communication and high link utilization between aggregation switches and connected devices.

M-LAG (Multi-Chassis Link Aggregation)

M-LAG allows two aggregation or access switches to function as a single logical device for link aggregation with servers or other switches. Key benefits include:

• Device-level redundancy: Improves link reliability from card to device level.
• Independent upgrades: Each switch can be upgraded without disrupting traffic.
• Load balancing: Traffic is distributed across master and backup devices in per-flow mode.
• Loop prevention: Unidirectional isolation prevents loops for multicast, broadcast, and unknown unicast traffic . M-LAG is widely used in data center networks to support high traffic volumes and ensure continuous service availability.

High Availability and Stacking

Huawei aggregation switches support stacking and hybrid stacking, allowing multiple switches to operate as a single logical unit. This provides:

• Device-level backup and increased interface density.
• Simplified management and configuration.
• High network reliability with VRRP, HSB, and redundant power/fan modules .

Advanced Features

Modern Huawei aggregation switches include:

• Layer 3 routing protocols: OSPF, BGP, RIPng, IS-IS, ECMP.
• VXLAN and BGP-EVPN: For scalable multi-tenant segmentation.
• Security features: DoS protection, DHCP/ARP snooping, IP/MAC filtering, and MACsec.
• Intelligent O&M: sFlow, telemetry, and CampusInsight for proactive monitoring and root-cause analysis .
• High-performance forwarding: 1:1 service forwarding units ensure full bandwidth even if an MPU or SFU fails .

Deployment Scenarios

• Campus networks: Aggregation switches act as gateways for wired and wireless users, manage VLANs, DHCP, and Layer 3 routing, and integrate with standalone ACs for Wi-Fi management .
• Data centers: M-LAG and high-density uplinks provide redundant, high-bandwidth connections to servers and core switches .
• Cloud-ready networks: CloudEngine S12700H supports modular expansion, slicing, and secure access, ideal for Wi-Fi 6/7 environments .

Summary

Huawei multi-aggregation switches combine high port density, link aggregation, M-LAG, stacking, and advanced Layer 2/3 features to deliver scalable, reliable, and high-performance networking. They are suitable for campus networks, data centers, and cloud-ready environments, providing both redundancy and simplified management while supporting modern protocols and security requirements.