Huawei core switches as aggregation interfaces
Huawei core switches can serve as aggregation points by connecting to aggregation switch stacks via Eth-Trunks, supporting VLANs, Layer 3 interfaces, and high-availability features.
Core Switch Role in Aggregation
In a campus or enterprise network, core switches (CSS) act as the backbone, providing high-speed forwarding, routing, and redundancy for aggregation and access layers . They handle large volumes of traffic and implement Layer 3 routing, VRRP, and ECMP for load balancing and fault tolerance . Core switches can also manage VLANs and Layer 3 interfaces (VLANIFs) to connect to aggregation switches, servers, and other network segments .
Connecting Core to Aggregation Switches
- Eth-Trunk Interfaces: Core switches use uplink Eth-Trunks to connect to aggregation switch stacks, providing high bandwidth and redundancy. Auto-negotiation can be enabled for dynamic link aggregation .
- Layer 3 Interfaces: VLANIF interfaces on the core switch are configured for each aggregation switch or VLAN, enabling routing between different network segments .
- VLAN Configuration: Core switches define VLANs for user traffic, management, and servers. Avoid using VLAN 1 for management or service traffic .
Aggregation Switch Considerations
- Stacking: Aggregation switches are often stacked to increase interface density and provide device-level backup . Core switches connect to these stacks via Eth-Trunks.
- DHCP and Routing: Aggregation switches can serve as DHCP servers for wired and wireless clients, while the core switch handles inter-VLAN routing and high-speed forwarding .
- High Availability: Features like VRRP, HSB, and Ethernet Ring Protection (SEP/ERPS) ensure minimal downtime and fast failover .
Interface Breakout and Aggregation
Huawei switches support QSFP interface breakout, allowing a 40G or 100G port to be split into multiple 10G or 25G interfaces. This increases port utilization and flexibility when connecting to aggregation switches or servers . After breakout, the interfaces behave like standard physical ports, supporting VLANs, QoS, and Layer 3 configurations.
Recommended Deployment
- Use core switches for high-throughput aggregation rather than directly connecting access switches to the core for scalability .
- Implement redundant Eth-Trunks between core and aggregation layers.
- Configure Layer 3 VLANIFs for each aggregation stack and server segment.
- Enable stacking on aggregation switches and configure auto-negotiation on Eth-Trunks for seamless integration .
- Consider VXLAN and BGP-EVPN for multi-tenant segmentation and cloud-scale designs in large campus networks . By following these practices, Huawei core switches can effectively function as aggregation interfaces, providing high performance, redundancy, and simplified management across campus or enterprise networks.
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