Huawei S3700-52P-PWR-SI 02354132 User Manual
Product codes
02354132
3.1.6 GVRP
GVRP is a protocol used for dynamic registration and deregistration of VLANs. GVRP
maintains the dynamic VLAN registration information in a switch and propagates the registration
information to other switches on the network through GARP.
maintains the dynamic VLAN registration information in a switch and propagates the registration
information to other switches on the network through GARP.
GVRP enables switches on the network to dynamically maintain and update VLANs. With
GVRP, you do not need to expend time to analyze the topology and manage configurations. You
can adjust the VLAN deployment on the entire network by configuring only a few devices.
GVRP, you do not need to expend time to analyze the topology and manage configurations. You
can adjust the VLAN deployment on the entire network by configuring only a few devices.
The S3700 supports GARP and GVRP. Through GVRP, the S3700 can send VLAN declaration
to other devices and dynamically create VLANs after receiving VLAN registration information
from other devices.
to other devices and dynamically create VLANs after receiving VLAN registration information
from other devices.
3.2 STP/RSTP/MSTP
3.2.1 STP and RSTP
The Spanning Tree Protocol (STP) and the Rapid Spanning Tree Protocol (RSTP) are link-layer
management protocols and are mainly applied to LANs to prevent loops. STP blocks redundant
links and trims a network into a tree topology free from loops. RSTP enhances STP. It provides
fast transition of interfaces status to speed up network convergence.
management protocols and are mainly applied to LANs to prevent loops. STP blocks redundant
links and trims a network into a tree topology free from loops. RSTP enhances STP. It provides
fast transition of interfaces status to speed up network convergence.
STP and RSTP prevent broadcast storms caused by loops and provides backup links for data
forwarding.
forwarding.
3.2.2 MSTP
The Multiple Spanning Tree Protocol (MSTP) is developed based on STP and RSTP. MSTP
divides a network into multiple regions. Based on VLAN tags, each region has several spanning
trees that are independent of each other. As a result, the entire network is trimmed to a tree
topology that is free from loops. Broadcast storms are thus prevented on the network.
divides a network into multiple regions. Based on VLAN tags, each region has several spanning
trees that are independent of each other. As a result, the entire network is trimmed to a tree
topology that is free from loops. Broadcast storms are thus prevented on the network.
MSTP associates VLANs with spanning trees so that packets of different VLANs are transmitted
along different spanning trees. This speeds up network convergence and implements load
balancing.
along different spanning trees. This speeds up network convergence and implements load
balancing.
Different from STP and RSTP, MSTP provides multiple backup links to implement load
balancing among VLANs.
balancing among VLANs.
3.2.3 MSTP Protection
BPDU Protection
The S3700 provides Bridge Protocol Data Unit (BPDU) protection when MSTP is enabled.
When BPDU protection is enabled, the S3700 shuts down the edge port that receives a protocol
BPDU instead of turning the edge port into a non-edge port. In this case, the spanning tree is not
recalculated, and thus network flapping is prevented.
When BPDU protection is enabled, the S3700 shuts down the edge port that receives a protocol
BPDU instead of turning the edge port into a non-edge port. In this case, the spanning tree is not
recalculated, and thus network flapping is prevented.
Root Protection
The S3700 provides root protection when MSTP is enabled. It retains the role of the root switch
by maintaining the role of the designated port as follows:
by maintaining the role of the designated port as follows:
S3700HI Ethernet Switches
Product Description
Product Description
3 Link Features
Issue 05 (2012-10-20)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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