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Configuration Guide - Reliability

S1720, S2700, S5700, and S6720 V200R010C00

This document describes the configuration of BFD, DLDP, VRRP, SmartLink, CFM, EFM, Y.1731 and MAC swap loopback to ensure reliability on the device.

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Licensing Requirements and Limitations for VRRP

Licensing Requirements and Limitations for VRRP

Involved Network Elements

Other network elements are required to support VRRP functions.

Licensing Requirements

VRRP configuration commands are available only after the S1720GW, S1720GWR, and S1720X have the license (WEB management to full management Electronic RTU License) loaded and activated and the switches are restarted. VRRP configuration commands on other models are not under license control.

For details about how to apply for a license, see S Series Switch License Use Guide.

Version Requirements

Table 4-5  Products and versions supporting VRRP
Product Product Model Software Version



Not supported

S1720GW and S1720GWR

V200R010C00, V200R011C00, V200R011C10

S1720GW-E and S1720GWR-E

V200R010C00, V200R011C00, V200R011C10

S1720X and S1720X-E

V200R011C00, V200R011C10

Other S1700 models

Models that cannot be configured using commands. For details about features and versions, see S1700 Documentation Bookshelf.



Not supported


Not supported


Not supported




Not supported



Not supported


V100R005C01, V100R006(C00&C01&C03&C05)


V100R006C01, V200R001C00


S5700LI and S5700S-LI

Not supported

S5720LI and S5720S-LI

V200R010C00, V200R011C00, V200R011C10


Not supported


Not supported


Not supported


V100R005C01, V100R006(C00&C01), V200R001(C00&C01), V200R002C00, V200R003C00, V200R005(C00&C01&C02&C03)


V200R001C00, V200R002C00, V200R003C00, V200R005(C00&C02)


V200R007C00, V200R008C00, V200R009C00, V200R010C00, V200R011C00, V200R011C10


V100R006C01, V200R001(C00&C01), V200R002C00, V200R003C00, V200R005(C00SPC500&C01&C02)


V200R003C00, V200R005(C00&C02&C03)


V200R006C00, V200R007(C00&C10), V200R008C00, V200R009C00, V200R010C00, V200R011C00, V200R011C10

S5720SI and S5720S-SI

V200R008C00, V200R009C00, V200R010C00, V200R011C00, V200R011C10






S6720LI and S6720S-LI

V200R011C00, V200R011C10

S6720SI and S6720S-SI

V200R011C00, V200R011C10


V100R006C00, V200R001(C00&C01), V200R002C00, V200R003C00, V200R005(C00&C01&C02)


V200R008C00, V200R009C00, V200R010C00, V200R011C00, V200R011C10


V200R009C00, V200R010C00, V200R011C00, V200R011C10

To know details about software mappings, see Hardware Query Tool.

Feature Limitations

  • In V200R003 and earlier versions, VRRP can be configured only on the VLANIF interface.

    In V200R005 and later versions, VRRP can be configured on the VLANIF interface and Layer 3 Ethernet interface.

    In V200R009 and later versions, VRRP can be configured on the VLANIF interface, Layer 3 Ethernet interface, and Sub-interface.

  • In V200R010 and later versions, VRRP6 can be configured on Dot1q termination sub-interfaces or QinQ termination sub-interfaces.
  • Switches of a VRRP group must be configured with the same VRID.
  • VRRP groups must use different virtual IP addresses. The virtual IP address of a VRRP group must be on the same network segment as the IP address of the interface where the VRRP group is configured.
  • If each switch in the VRRP group uses a different VRRP version, VRRP packets may fail to be transmitted. When a VRRPv3-enabled switch and a VRRPv2-enabled switch belong to the same VRRP group, run the vrrp version-3 send-packet-mode { v2-only | v2v3-both } command to configure the switch to send VRRPv2 packets.
  • If both VRRP and static ARP are configured on a VLANIF interface, a Dot1q termination sub-interface, a QinQ termination sub-interface, or an Ethernet interface on a device, an IP address mapped to a static ARP entry cannot be used as a virtual IP address. If a VRRP virtual IP address is an IP address mapped to a static ARP entry on the device, the device generates incorrect host routes, affecting traffic forwarding.
  • The virtual MAC address of a VRRP group cannot be configured as a static or blackhole MAC address.
  • A maximum of 24 VRRP groups can be configured on the S3700EI, and a maximum of 64 VRRP groups can be configured on other models. In V200R003 and later versions, the set vrrp max-group-number max-group-number command can be used to set the maximum number of allowed VRRP groups.
  • The ARP aging probe packets sent by a VRRP device use an interface IP address, instead of a virtual IP address, as the source IP address.
Updated: 2019-12-28

Document ID: EDOC1000141941

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