Dual-Homing Access in a Multi-Node Backup Scenario
Multi-system backup supports two types of access topologies: direct dual-homing access through aggregation switches and dual-homing access through the ring network (semi-ring) formed by aggregation switches.
Direct Dual-Homing Access Through Aggregation Switches
As shown in Figure 1, each aggregation switch is dual-homed to the master and slave NetEngine 8000 Fs. VRRP is deployed on the access side. One VRRP protection group is deployed for each pair of active and standby links.
Dual-Homing Access Through the Ring Network (Semi-ring) Formed by Aggregation Switches
In the case of ring-based access, the NetEngine 8000 F is not on the ring, and the access switch accesses the NetEngine 8000 F through the aggregation switch. As shown in Figure 2, one VRRP group is deployed across two aggregation switches. The VRRP group determines the active/standby status of each access link. If the VRRP group is in the master state, the access link can be accessed by users. If the VRRP group is in the Slave state, the access link cannot be accessed by users.
