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S12700 V200R010C00 Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring link aggregation, VLANs, Voice VLAN, VLAN mapping, QinQ, GVRP, MAC table, STP/RSTP/MSTP, SEP, and so on.
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Multi-Ring Networking

Multi-Ring Networking

When SEP runs at the access layer and the aggregation layer, redundancy protection switching can be implemented at the access layer and the aggregation layer and the topology of the SEP segment can be displayed.

In multi-ring networking, the topology change notification function must be configured among ring networks.

Figure 17-12 shows a networking diagram of multiple rings running SEP.

Figure 17-12  Multiple rings running SEP

In Figure 17-12, LSW1 to LSW5 are at the aggregation layer, and LSW6 to LSW14 are at the access layer. Layer 2 services are transparently transmitted at the access layer and the aggregation layer.

If the topology of the access layer changes, a node in the SEP segment sends a Flush-FDB packet to instruct other nodes in the SEP segment to update their MAC address tables and ARP tables. Edge devices in the SEP segment send TC packets to notify the upper-layer network that the topology of the SEP segment changes.

Updated: 2019-08-21

Document ID: EDOC1000142081

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