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Configuration Guide - Ethernet Switching

S1720, S2700, S5700, and S6720 V200R012(C00 and C20)

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, VLAN aggregation, MUX VLAN, VLAN termination, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, and Layer 2 protocol transparent transmission.
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Creating an ERPS Ring

Creating an ERPS Ring


ERPS works for ERPS rings. An ERPS ring consists of interconnected Layer 2 switching devices configured with the same control VLAN and data VLAN. Before configuring other ERPS functions, configure an ERPS ring.


  1. Run system-view

    The system view is displayed.

  2. Run erps ring ring-id

    An ERPS ring is created and the ERPS ring view is displayed.

    By default, an ERPS ring configured using the erps ring ring-id command is a major ring.

  3. Run version v2

    ERPSv2 is specified.

    By default, ERPSv1 is used.

    Before specifying ERPSv1 for an ERPSv2-enabled device, delete all ERPS configurations that ERPSv1 does not support.

  4. (Optional) Run sub-ring

    The ERPS ring is configured as a sub-ring.

    By default, an ERPS ring is a major ring. Major rings are closed, and sub-rings are open. This step is performed only when an existing ERPS ring needs to be used as a sub-ring.

    An ERPS ring that has a port cannot be configured as a sub-ring. Before configuring an ERPS ring that has a port as a sub-ring, run the undo erps ring command in the interface view or the undo port command in the ERPS ring view to delete the port from the ERPS ring. Then run the sub-ring command to configure the ERPS ring as a sub-ring.

  5. (Optional) Run virtual-channel { enable | disable }

    The RAPS PDU transmission mode is specified in the sub-ring.

    By default, sub-rings use non-virtual-channels (NVCs) to transmit RAPS PDUs. The default transmission mode is recommended. When sub-ring links are incontiguous, VCs must be used. This step takes effect only in a sub-ring.


    If a virtual channel (VC) needs to be used, configure VCs on all nodes of a sub-ring and intersecting point of the sub-ring and major ring.

  6. (Optional) Run description text

    The description is configured for the ERPS ring.

    By default, the description of an ERPS ring is the ERPS ring name, for example, Ring 1.

Updated: 2018-12-24

Document ID: EDOC1100038339

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