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S9300, S9300E, and S9300X V200R012C00 Configuration Guide - Ethernet Switching

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, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, HVRP, and Layer 2 protocol transparent transmission.
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Overview of HVRP

Overview of HVRP


Through dynamic VLAN registration and aging mechanism, the Hierarchy VLAN Register Protocol (HVRP) ages the VLANs that interfaces join and are not used to forward packets on an interface and saves only necessary VLANs. This saves MAC address entries.


The ring or tree topology is widely used for network deployment. Regardless of topology, aggregation devices must support a large number of MAC address entries to meet requirements of downstream users. As users on the network increase quickly, MAC address entries supported by a switch may be insufficient. As a result, the switch cannot learn the MAC addresses of some users. In this case, packets of these users are broadcast in the VLAN, wasting bandwidth and deteriorating network performance.

HVRP can be used when the number of MAC addresses supported by the switch is smaller than the total number of users connected to the switch. In special networking, HVRP can dynamically register and age VLANs to save MAC addresses and increase the number of users that the switch supports.

Updated: 2019-01-18

Document ID: EDOC1100038290

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