Huawei Switch Core and Branch Communication

Huawei core and branch switches communicate through a combination of Layer 2 and Layer 3 networking, VLANs, DHCP, and VPNs to ensure seamless connectivity between headquarters and branch offices.

Core Switch Functions

Huawei core switches, such as the S7700, S9700, and CloudEngine series, act as the central gateway for both wired and wireless users in a campus network. They handle high-volume data forwarding, implement high network reliability, and manage wireless access points (APs) through the native AC function, enabling wired and wireless convergence . Core switches also provide DHCP services, assigning IP addresses to devices across the network, and support Layer 2 and Layer 3 communication for efficient routing between VLANs and subnets .

Branch Switch Integration

Branch switches, often part of the S series (e.g., S5700, S6700), connect to the core switches via uplinks using Eth-Trunk or stacked interfaces to increase bandwidth and provide redundancy . Branch switches can implement device-level backup and link aggregation to ensure high availability. They also support VLAN segmentation to separate traffic types and maintain secure communication with the headquarters.

Inter-Branch and HQ Communication

For enterprises with multiple locations, Huawei switches enable VPN-based connectivity over leased Internet links, allowing secure communication between headquarters and branch offices . Egress devices, such as Huawei AR series routers, work with S series switches to provide NAT, VPN, and encryption, ensuring secure and reliable data transmission between sites . Redundancy protocols like VRRP and active/standby routing enhance network resilience.

Deployment Best Practices

• VLAN Configuration: Define VLANs on both core and branch switches to segment traffic and simplify management .
• Stacking and Eth-Trunk: Use stacking for aggregation switches and Eth-Trunk for uplinks to increase bandwidth and provide failover .
• DHCP and IP Management: Configure the core switch as the DHCP server to centrally manage IP addresses for wired and wireless clients .
• Wireless Integration: Core switches with native AC functionality manage APs and wireless traffic, ensuring seamless connectivity across the campus .
• Security and QoS: Implement ACLs, firewalls, and QoS policies to protect data and prioritize critical services .

Summary

Huawei core and branch switches form a scalable, high-performance network that supports both campus and branch connectivity. Core switches act as the central hub for routing, DHCP, and wireless management, while branch switches extend connectivity with redundancy, VLAN segmentation, and secure VPN links. Together, they enable reliable, secure, and efficient communication across enterprise locations, supporting both wired and wireless services .