l Aging timer of registered VLANs
The aging timer of registered VLAN specifies the aging time of registered VLANs. If the
HVRP designated interface does not receive the registration packet of a VLAN within the
aging time, the VLAN is aged on the HVRP designated interface.
12.2 HVRP Features Supported by the S7700
This section describes the HVRP features supported by the S7700.
Working Mechanism of HVRP
Through the dynamic VLAN registration and aging mechanism, HVRP ages the VLANs on the
interfaces that do not forward packets and saves only necessary VLANs. When a VLAN contains
0 to 2 interfaces, the interfaces do not learn MAC addresses. When the VLAN contains two
interfaces, data packets are broadcast on the VLAN and no extra network bandwidth is
consumed.
Figure 12-1 shows the networking of HVRP. The working mechanism of HVRP is described
based on this networking.
l STP is enabled on the entire network, and the HVRRP root interface and HVRRP
designated interfaces are calculated through STP.
l The Switches are connected through trunk interfaces. The trunk interfaces are all enabled
with HVRP and can forward packets of VLAN 101 to VLAN 500.
l HVRRP is disabled on the interfaces outside the STP network, that is, edge interfaces.
Figure 12-1 Networking diagram of HVRP
SwitchE
ME60
SwitchA
SwitchB
SwitchC
SwitchD
VLAN:101-500
VLAN:201-300VLAN:101-200
VLAN:301-400
VLAN:401-500
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.
612
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