Huawei S5700-EI Comprehensive reliability mechanisms

The S5700-EI supports enhanced S5352C-EI trunk (E-Trunk) that enables a CE to be dual-homed to two PEs (S5700s). E-Trunk greatly enhances link reliability between devices and implements link aggregation between devices. This improves reliability of access devices.

The S5700-EI supports the Smart Ethernet Protection (SEP) protocol, a ring network protocol applied to the link layer on an Ethernet network. SEP can be used on open ring networks and can be deployed on upper-layer aggregation devices to provide fast switchover (within 50 ms), ensuring non-stop transmission of services. SEP features simplicity, high reliability, fast switchover, easy maintenance, and flexible topology, facilitating network planning and management.

The S5700-EI supports VRRP, and can set up VRRP groups with other Layer 3 switches. VRRP provides redundant routes to ensure stable and reliable communication. Multiple equal-cost routes to an uplink device can be configured on the S5700-EI to provide route redundancy. When an active route is unreachable, traffic is switched to a backup route.

The S5700-EI supports BFD, which provides millisecond-level fault detection for protocols such as OSPF, IS-IS, VRRP, and PIM to improve network reliability. Complying with IEEE 802.3ah and 802.1ag, the S5700-EI supports point-to-point Ethernet fault management and can detect faults in the last mile of an Ethernet link to users.

Several S5700s can be stacked to provide a 1000 Mbit/s access rate for terminals. Only four pairs of optical fibers are required to connect the stack to uplink devices. This reduces the number of optical fibers and ports needed on uplink devices and enhances network S5352C-PWR-SI reliability.