¾ STP Timers, ¾ STP Generation | TP-Link TL-SG3216 specs

Figure 7-1 Basic STP diagram

¾STP Timers

Hello Time:

Hello Time ranges from 1 to 10 seconds. It specifies the interval to send BPDU packets. It is used to test the links.

Max. Age:

Max. Age ranges from 6 to 40 seconds. It specifies the maximum time the switch can wait without receiving a BPDU before attempting to reconfigure.

Forward Delay:

Forward Delay ranges from 4 to 30 seconds. It specifies the time for the port to transit its state after the network topology is changed.

When the STP regeneration caused by network malfunction occurs, the STP structure will get some corresponding change. However, as the new configuration BPDUs cannot be spread in the whole network at once, the temporal loop will occur if the port transits its state immediately. Therefore, STP adopts a state transit mechanism, that is, the new root port and the designated port begins to forward data after twice forward delay, which ensures the new configuration BPDUs are spread in the whole network.

¾BPDU Comparing Principle in STP mode

Assuming two BPDUs: BPDU X and BPDU Y

If the root bridge ID of X is smaller than that of Y, X is superior to Y.

If the root bridge ID of X equals that of Y, but the root path cost of X is smaller than that of Y, X is superior to Y.

If the root bridge ID and the root path cost of X equal those of Y, but the bridge ID of X is smaller than that of Y, X is superior to Y.

If the root bridge ID, the root path cost and bridge ID of X equal those of Y, but the port ID of X is smaller than that of Y, X is superior to Y.

¾STP Generation

zIn the beginning

In the beginning, each switch regards itself as the root, and generates a configuration BPDU for each port on it as a root, with the root path cost being 0, the ID of the designated bridge being that of the switch, and the designated port being itself.

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TP-Link TL-SG3216 manual ¾ STP Timers, ¾ Bpdu Comparing Principle in STP mode, ¾ STP Generation

Contents

TL-SG3216/TL-SG3424 JetStream L2 Lite Managed Switch Copyright & Trademarks Contents Gvrp 100 VII NDP Package Contents Conventions About this GuideIntended Readers Overview of This Guide System Switching Vlan Spanning Tree Multicast QoS ACL Network Security Snmp Cluster Return to Contents Overview of the Switch Main FeaturesIntroduction Appearance Description Front Panel¾ LEDs Name Status Indication Rear Panel Login to the Switch LoginConfiguration Return to Contents System Summary SystemSystem Info ¾ Port Status Rate PortType Status Device Description System Time¾ Device Description Synchronize With Current SystemGet GMT PC’S Clock ¾ IP Config System IP User Config User ManageUser Table User Status User ID, Name, Access Level and status Operation¾ User Info ¾ User Table ¾ Config Restore Config RestoreConfig Backup System Tools Firmware Upgrade ¾ Config Backup System Reset Access SecuritySystem Reboot Access Control IP Address&Mask ¾ Access Control Config¾ Session Config MAC Address SSL Config ¾ Access User Number ¾ Certificate Download SSH Config¾ Global Config ¾ Key Download Idle Timeout ProtocolMax Connect Download ¾ Configuration ProcedureKey Type ¾ Network Requirements Application Example 2 for SSH Page Return to Contents Port SwitchingPort Config Port Select Speed and Duplex Port MirrorDescription Flow Control Mirroring Mirror ModeGroup Mode Port Security ¾ Port Security LAG Max Learned MACLearned Num ¾ LAG Table LAG TableAggregate Arithmetic Group Number Static LAG Detail Information Lacp Config ¾ LAG ConfigLAG will delete this LAG System Priority ¾ Lacp ConfigAdmin Key Port Priority Traffic Monitor Traffic Summary¾ Auto Refresh Traffic Statistics MAC Address Way Address TableBound MAC address Port ¾ Search Option ¾ Address Table Displays the corresponding Vlan ID of the MAC address MAC Address Displays the MAC address learned by the switchStatic Address ¾ Create Static Address Dynamic Address ¾ Static Address Table ¾ Aging Config ¾ Dynamic Address Table Filtering Address Bind ¾ Create Filtering Address ¾ Filtering Address Table Vlan 802.1Q Vlan ¾ Link Types of ports ¾ Pvid Vlan ID Select Vlan Config¾ Vlan Table Description ： Is valid or not ¾ Vlan ConfigEnter the ID number of Vlan ¾ Vlan Members ¾ Vlan Port Config Port Displays the port number ¾ Vlan of Port Required. On the VLAN→802.1Q VLAN→Port Config page, setRequired. On the VLAN→802.1Q VLAN→VLAN Config Vlan Description VLAN→VLAN Config MAC Vlan MAC Select Protocol Vlan¾ MAC Vlan Table Step Operation Description ¾ The Procedure for the Switch to Identify Packet Protocol ¾ Encapsulation Format of Ethernet Data 802.3 raw 802.2 LLC Snap Protocol ¾ The Implementation of Protocol VlanEncapsulation Vlan packets are processed in the following way Protocol Group Table Protocol Group¾ Protocol Group Table ¾ Protocol Group Config Protocol Template¾ Protocol Group Member Application Example for 802.1Q Vlan ¾ Network Diagram ¾ Configuration Procedure Required. On VLAN→802.1Q VLAN→Port Config page, configureRequired. On VLAN→802.1Q VLAN→VLAN Config page, create a Application Example for MAC Vlan ¾ Network Diagram Application Example for Protocol Vlan Required. On VLAN→Protocol VLAN→Protocol Template Gvrp On VLAN→Protocol VLAN→Protocol Group page, create protocol ¾ Gvrp ¾ Port Config Select Port Status Registration Mode Configuration Procedure Spanning Tree ¾ STP Elements ¾ STP Timers ¾ Bpdu Comparing Principle in STP mode¾ STP Generation Step Operation Tips ： ¾ Rstp Elements ¾ Mstp Elements ¾ Port States ¾ Port Roles STP Config STP Config Hello Time Forward DelayVersion Max Age Port Config STP Summary IntPath PriorityExtPath Edge Port Region Config Mstp InstancePort Status Instance Config ¾ Region Config Instance Instance Port Config¾ Instance Table Clear Instance ID Path CostPort Role STP Security Port Protect ¾ TC Protect ¾ Bpdu Protect¾ Bpdu Filter TC Protect Loop ProtectRoot Protect Bpdu Protect Application Example for STP Function TC Protect On Spanning Tree→STP Config→STP Config On Spanning Tree→STP Config→Port ConfigOn Spanning Tree→MSTP Instance→Instance Configure Switch D ¾ Suggestion for Configuration Multicast ¾ Multicast Overview¾ Multicast Address ¾ Multicast Address Table Multicast IP Port ¾ Igmp Snooping Process Igmp Snooping¾ Igmp Snooping ¾ Igmp Messages Snooping Config ¾ Igmp Snooping Fundamentals ¾ Igmp Snooping Status Description Displays Igmp Snooping status Member Igmp Snooping Fast Leave Leave Time Router Port TimeMember Port Time Static Router Port Multicast Vlan Snooping→Snooping Config and Port ConfigMulticast→IGMP Snooping→VLAN Config Displays the Vlan ID ¾ Multicast Vlan On the Multicast→IGMP Snooping→Snooping Config VlanMulticast→IGMP Snooping→Multicast Vlan Snooping→Snooping Config ¾ Configuration Procedure Step Operation DescriptionSnooping→Port Config Multicast IP Multicast IP Table Static Multicast IP Multicast Filter ¾ Create Static Multicast¾ Static Multicast IP Table Start Multicast IP IP-RangeIP Range ID End Multicast IP Port Filter ¾ Port Filter ConfigAction Mode Filter Displays the LAG number which the port belongs to Packet StatisticsPorts taking up too much bandwidth Multicast→Multicast Filter→IP-Range ¾ Igmp Statistics ¾ Priority Mode QoS¾ QoS ¾ Schedule Mode 802.1Q frame SP-Mode ¾ Port Priority Config DiffServPort Priority ¾ Schedule Mode Config Schedule ModeRequired. On QoS→DiffServ→Schedule Mode Required. On QoS→DiffServ→Port Priority 3 802.1P Priority Dscp Priority¾ Priority Level ¾ Dscp Priority Config Required. On QoS→DiffServ→DSCP Priority ¾ Rate Limit Config Bandwidth ControlRate Limit ¾ Storm Control Config Storm Control Bps Voice VlanBroadcast Rate Mulitcast Rate ¾ Security Mode of Voice Vlan TAG Global Config Security Packet Type Processing ModeEnter the Vlan ID of the voice Vlan Select the desired port for voice Vlan configuration. It is OUI Config Configuration Procedure of Voice Vlan Displays the OUI address of the voice device Time-Range Summary ACLTime-Range Index Time-Range Create ¾ Create Holiday ACL ConfigHoliday Config ¾ Holiday Table ¾ Rule Table ACL SummaryACL Create ¾ Create ACL Rule ID MAC ACL¾ Create MAC ACL EtherType ¾ Create Standard-IP ACL Standard-IP ACLExtend-IP ACL Time-Range ¾ Create Extend-IP ACL IP ProtocolTCP Flag ： Policy Config Policy Summary ¾ Create Policy Policy CreateAction Create ¾ Create Action Policy Binding Binding Table Port Binding Vlan BindingDirection Displays the binding direction Enter the ID of the Vlan you want to bind ¾ VLAN-Bind ConfigApplication Example for ACL ¾ VLAN-Bind Table On ACL→ACL Config→ACL Create page, create ACL On ACL→ACL Config→Standard-IP ACL page, select ACL Network Security IP-MAC Binding Manual Binding Protect Type Select the Protect Type for the entry ¾ Manual Binding OptionEnter the Vlan ID ¾ Manual Binding Table ARP Scanning End IP Address Dhcp SnoopingStart IP Address Scan Network diagram for DHCP-snooping implementation ¾ Dhcp Working Principle ¾ Option Dhcp Cheating Attack Implementation Procedure ¾ Dhcp Cheating Attack ¾ Dhcp Snooping Config ¾ Option 82 Config ¾ Port Config Port SelectCustomization Circuit ID Remote ID ARP Inspection ¾ Imitating Gateway¾ Cheating Gateway 10 ARP Attack Cheating Gateway ¾ Cheating Terminal Hosts ¾ Man-In-The-Middle Attack ¾ ARP Flooding Attack ARP Detect ¾ ARP Detect¾ Trusted Port ARP Defend Required. On the Network Security→IP-MACNetwork Security→ARP Defend ARP Statistics¾ ARP Defend Speed DoS Defend ¾ Illegal ARP Packet DoS Attack Type Description 11.4 ¾ Configure¾ Architecture of 802.1X Authentication ¾ Defend Table ¾ The Mechanism of an 802.1X Authentication System ¾ 802.1X Authentication Procedure ¾ 802.1X Timer ¾ Guest Vlan Guest Vlan Authentication Method802.1X Guest Vlan ID Supplicant Timeout Server TimeoutRetry Times Control Type Control ModeRadius Server Authorized On the Network Security→802.1X→Global Config Required. On the Network Security→802.1X→RadiusRequired. On the Network Security→802.1X→Port ¾ Snmp Management Frame Snmp¾ Snmp Overview ¾ Snmp Versions ¾ Snmp Configuration Outline ¾ MIB Introduction Snmp Config ¾ Local Engine¾ Remote Engine View Type Snmp ViewMIB Object ID View Name ¾ Group Config Snmp Group Snmp User ¾ Group Table Privacy Mode Auth ModeAuth Password Privacy Password ¾ Community Config AccessSnmp Community MIB View Required. On the SNMP→SNMP Config→GlobalRequired. On the SNMP→SNMP Config→SNMP ¾ Community Table On the SNMP→SNMP Config→SNMP Notification User TimeoutUDP Port Retry Rmon ¾ Rmon GroupRmon Group Function Event Config History Control¾ History Control Table Alarm Config ¾ Event Table Rising Threshold VariableSample Type Rising Event 179 Cluster ¾ Cluster Role 13.1 NDP Neighbor Info¾ Introduction to Cluster NDP Summary ¾ Neighbor¾ Neighbor Info ¾ Port Status Displays the port number of the switch NDP Disable NDP ConfigEnable ¾ Global Cofig Device MAC NtdpDevice Table Cluster Name Neighbor Info Ntdp SummaryHops Collect Topology Ntdp Config Port Displays the port number of the switch Ntdp Interval Time Ntdp Hop DelayNtdp Port Delay Ntdp Hops ¾ Global ClusterCluster Summary Cluster Cluster Config ¾ Global Config Cluster ¾ Current Role ¾ Role Change Application Example for Cluster Function On Cluster→NDP→NDP Config page, enable NDP On Cluster→NTDP→NTDP Config page, enable 194 Maintenance System MonitorCPU Monitor Memory Monitor 14.2 Log Log Table Local Log Log Buffer ¾ Local Log ConfigRemote Log Log File Backup Log ¾ Log HostHost IP Cable Test ErrorDevice Diagnose Pair Loopback Switch is availableNetwork Diagnose Ping ¾ Ping Config Tracert ¾ Tracert Config 10 Tracert Following entries are displayed on this screen Appendix a Specifications Appendix B Configuring the PCs 207 Now Appendix C Load Software using FTP Hardware InstallationConfigure the Hyper Terminal 210 Download Firmware via bootUtil menu Figure C-5 Port Settings TP-LINK upgrade You can only use the port 1 to upgrade Are you want to upgrade the firmwareY/N y TP-LINK start Start User Installation Guide Appendix D 802.1X Client Software 215 216 Uninstall Software Figure D-7 InstallShield Wizard Complete Configuration Figure D-11 Uninstall Complete 219 FAQ Figure D-16 Connection Status 221 Appendix E Glossary Ieee 802.1D Multicast SwitchingGroup Attribute Registration Protocol Garp Ieee 802.1Q Link Aggregation Port AuthenticationRemote Authentication Dial-in User Service Radius Link Aggregation Control Protocol Lacp Spanning Tree Algorithm STA Simple Network Management Protocol SnmpSimple Network Time Protocol Sntp Telnet