Huawei quidway s7700 Configuration Guide - Ethernet

12.1 HVRP Overview
This section describes the principle of the Hierarchy VLAN Register Protocol (HVRP).
Background of HVRP
When constructing a metropolitan area network (MAN), carriers usually adopt the ring topology
or tree topology. Regardless of the topology, devices on the convergence layer must support a
large number of MAC address entries to meet the requirements of users. The number of users
on the network increases quickly, and the MAC addresses supported by a switch may be
insufficient for the users connected to the switch. As a result, the switch cannot learn the MAC
addresses of some users. In this case, packets are broadcast in the VLAN, which wastes network
bandwidth and degrades the network performance.
The HVRP protocol can be used when the number of MAC addresses supported by a switch is
smaller than the total number of users connected to the switch. HVRP can identify user VLANs
(that is, local VLANs) and non-user VLANs. In special networking, HVRP can dynamically
register and age VLANs to save MAC addresses and increase the number of users that the switch
supports.
Terms of HVRP
l HVRP interface
An HVRP interface is an interface that is configured with HVRP attributes and can send,
receive, and process HVRP packets.
l HVRP root interface
An HVRP root interface is an HVRP interface that functions as the root interface in an STP
region.
l HVRP designated interface
An HVRP designated interface is an HVRP interface that functions as the designated
interface in an STP region.
l Local VLAN
A local VLAN is a VLAN that does not contain any HVRP interface.
l VLAN registration
VLAN registration is a process of adding HVRP interfaces to VLANs meeting certain
conditions in tagged mode.
l VLAN aging
VLAN aging is a process of deleting a VLAN from an HVRP interface.
l Permanent VLAN
A permanent VLAN is a VLAN that are never aged by an HVRP interface.
l Sending local VLAN information
After STP and HVRP are enabled, the HVRP root interface sends HVRP packets containing
the local VLAN information.
l VLAN registration timer
The VLAN registration timer specifies the interval for the HVRP root interface to send
HVRP VLAN registration packets.
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 12 HVRP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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Huawei quidway s7700 Specifications

General

Brand	Huawei
Model	quidway s7700
Category	Network Router
Language	English