Netis ST3326(ST-3302) [44/118] Stp overview

Netis ST3326(ST-3302) [44/118] Stp overview
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Figure 7-4-2
RRPP Timer Configuration
Hello timer: set interval time the switch sends rrpp hello,default is 1 second.
Fail-timer: set a time period,which can help slave port to know whether receive a hello or not.
Delete Ring
Ring ID: input ring id then press OK,this can delete the ring set before.
Figure 7-4-3
View rrpp infomation
STP Overview
Functions of STP
Spanning tree protocol (STP) is a protocol conforming to IEEE 802.1d. It aims to eliminate loops
on data link layer in a local area network (LAN). Devices running this protocol detect loops in the
network by exchanging packets with one another and eliminate the loops detected by blocking
specific ports until the network is pruned into one with tree topology. As a network with tree
topology is loop-free, it prevents packets in it from being duplicated and forwarded endlessly and
prevents device performance degradation.
Currently, in addition to the protocol conforming to IEEE 802.1d, STP also refers to the protocols
based on IEEE 802.1d, such as RSTP, and MSTP.
Protocol packets of STP
STP uses bridge protocol data units (BPDUs), also known as configuration messages, as its
protocol packets.
STP identifies the network topology by transmitting BPDUs between STP compliant network
devices.
BPDUs contain sufficient information for the network devices to complete the spanning tree
calculation.
In STP, BPDUs come in two types:
Configuration BPDUs, used to calculate spanning trees and maintain the spanning tree

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