TP-Link TL-SL5428E manual ¾ Igmp Snooping Process, ¾ Igmp Messages

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¾IGMP Snooping

In the network, the hosts apply to the near Router for joining (leaving) a multicast group by sending IGMP (Internet Group Management Protocol) messages. When the up-stream device forwards down the multicast data, the switch is responsible for sending them to the hosts. IGMP Snooping is a multicast control mechanism, which can be used on the switch for dynamic registration of the multicast group. The switch, running IGMP Snooping, manages and controls the multicast group via listening to and processing the IGMP messages transmitted between the hosts and the multicast router, thereby effectively prevent multicast groups being broadcasted in the network.

The Multicast module is mainly for multicast management configuration of the switch, including four submenus: IGMP Snooping, Multicast IP, Multicast Filter and Packet Statistics.

8.1 IGMP Snooping

¾IGMP Snooping Process

The switch, running IGMP Snooping, listens to the IGMP messages transmitted between the host and the router, and tracks the IGMP messages and the registered port. When receiving IGMP report message, the switch adds the port to the multicast address table; when the switch listens to IGMP leave message from the host, the router sends the Group-Specific Query message of the port to check if other hosts need this multicast, if yes, the router will receive IGMP report message; if no, the router will receive no response from the hosts and the switch will remove the port from the multicast address table. The router regularly sends IGMP query messages. After receiving the IGMP query messages, the switch will remove the port from the multicast address table if the switch receives no IGMP report message from the host within a period of time.

¾IGMP Messages

The switch, running IGMP Snooping, processes the IGMP messages of different types as follows.

1. IGMP Query Message

IGMP query message, sent by the router, falls into two types, IGMP general query message and IGMP group-specific-query message. The router regularly sends IGMP general message to query if the multicast groups contain any member. When receiving IGMP leave message, the receiving port of the router will send IGMP group-specific-query message to the multicast group and the switch will forward IGMP group-specific-query message to check if other members in the multicast group of the port need this multicast.

When receiving IGMP general query message, the switch will forward them to all other ports in the VLAN owning the receiving port. The receiving port will be processed: if the receiving port is not a router port yet, it will be added to the router port list with its router port time specified; if the receiving port is already a router port, its router port time will be directly reset.

When receiving IGMP group-specific-query message, the switch will send the group-specific query message to the members of the multicast group being queried.

2. IGMP Report Message

IGMP report message is sent by the host when it applies for joining a multicast group or responses to the IGMP query message from the router.

When receiving IGMP report message, the switch will send the report message via the router port in the VLAN as well as analyze the message to get the address of the multicast group the host applies for joining. The receiving port will be processed: if the receiving port is a new member port, it will be added to the multicast address table with its member port time specified; if the receiving port is already a member port, its member port time will be directly reset.

3. IGMP Leave Message

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Contents Rev 1910010529 Copyright & Trademarks Contents Gvrp TC Protect 101 11.4.1 11.4.2 NtdpVII Package Contents About this Guide Intended ReadersConventions Overview of This GuidePath Switch, which facilitates you to monitor the Igmp messages Return to Contents Introduction Overview of the SwitchMain Features ¾ LEDs Name Status Indication Appearance DescriptionFront Panel Rear Panel Configuration Login to the SwitchLogin Return to Contents System System InfoSystem Summary ¾ Port Status¾ Port Info PortType Rate¾ Device Description Device Description¾ Bandwidth Utilization ¾ Time Info ¾ Time ConfigSystem Time System IP User Manage User TableUser Config ¾ User InfoConfig Restore PasswordConfirm Password Retype the password User ID, Name, Access Level and status Operation¾ Config Backup Config BackupFirmware Upgrade System Reboot System ResetAccess Security Access Control¾ Access Control Config ¾ Session ConfigIP Address&Mask MAC AddressSSL Config ¾ Access User NumberSSH Config ¾ Global Config¾ Certificate Download ¾ Key DownloadMax Connect Idle TimeoutProtocol ¾ Configuration Procedure Key TypeDownload ¾ Network RequirementsApplication Example 2 for SSH Page Return to Contents Switching Port ConfigPort Port SelectPort Mirror DescriptionSpeed and Duplex Flow Control¾ Mirroring Port ¾ Mirrored PortIngress EgressPort Security ¾ Port SecurityLearned Num Port IsolationMax Learned MAC ¾ Port Isolation Config Forward Portlist Select the port that to be forwarded to¾ Port Isolation List Forward Portlist Display the forwardlistLAG LAG TableAggregate Arithmetic ¾ LAG TableGroup Number Member¾ LAG Config Static LAGLacp Config LAG will delete this LAG¾ Lacp Config Admin KeySystem Priority Port Priority¾ Auto Refresh Traffic MonitorTraffic Summary Traffic Statistics MAC Address Type Configuration Way Aging out RelationshipBound Address and the port¾ Search Option ¾ Address TableMAC Address Displays the MAC address learned by the switch Static AddressDisplays the corresponding Vlan ID of the MAC address ¾ Create Static AddressDynamic Address ¾ Static Address Table¾ Aging Config ¾ Dynamic Address TableFiltering Address Bind¾ Create Filtering Address ¾ Filtering Address TableVlan Vlan implementation802.1Q Vlan ¾ Link Types of portsVlan Config ¾ Pvid¾ Vlan Table Vlan ID SelectDescription ： Members Operation ：¾ Vlan Config Enter the ID number of VlanIs valid or not ¾ Vlan Members¾ Vlan Port Config Port Displays the port numberRequired. On the VLAN→802.1Q VLAN→Port Config page, set Required. On the VLAN→802.1Q VLAN→VLAN Config¾ Vlan of Port Vlan DescriptionOptional. On the VLAN→802.1Q VLAN→VLAN Config MAC VlanMAC Select Port Enable¾ MAC Vlan Table Required. On the VLAN→MAC VLAN→Port Enable Protocol VlanProtocol Vlan Protocol Template¾ Create Protocol Vlan ¾ Protocol Vlan Table¾ Create Protocol Template ¾ Protocol Template TableApplication Example for 802.1Q Vlan Required. On VLAN→802.1Q VLAN→Port Config page, configure Required. On VLAN→802.1Q VLAN→VLAN Config page, create aApplication Example for MAC Vlan Operation Description¾ Network Diagram ¾ Configuration Procedure Application Example for Protocol Vlan Required. On VLAN→Protocol VLAN→Protocol Template On VLAN→Protocol VLAN→Protocol Vlan page, create protocol Protocol type Value¾ VPN Up-link Ports VPN ConfigVlan Mapping ¾ Vlan Mapping Config ¾ Vlan Mapping TableRequired. On the VLAN→VLAN VPN→VPN Config Optional. On the VLAN→VLAN VPN→VPN ConfigRequired. On the VLAN→VLAN VPN→Port Enable Required. On the VLAN→VLAN VPN→VLAN MappingGvrp ¾ Garp¾ Gvrp ¾ Port Config Select Port Status Registration ModeConfiguration Procedure Private Vlan¾ Private Vlan Implementation ¾ Features of Private Vlan¾ The Elements of a Private Vlan Pvid ¾ Packet forwarding in Private Vlan Pvlan ¾ Create Private Vlan ¾ Private Vlan TablePrimary Vlan Secondary VlanPort Select the desired port for configuration Port Type Required. On the VLAN→Private VLAN→Port Configure¾ Private Vlan Port Table Required. On the VLAN→Private VLAN→PVLANApplication Example for Private Vlan Required. On the VLAN→802.1Q VLAN→VLAN Config page, click Spanning Tree ¾ STP Elements¾ STP Timers ¾ Bpdu Comparing Principle in STP mode¾ STP Generation Step Operation¾ Mstp Elements Tips：¾ Rstp Elements ¾ Port States ¾ Port RolesSTP Config STP ConfigForward Delay VersionHello Time Max AgeSTP Summary Port Config STP SummaryPriority ExtPathIntPath Edge PortRegion Config Mstp InstancePort Role Port StatusInstance Config ¾ Region ConfigInstance Port Config ¾ Instance TableInstance ClearInstance ID Path CostSTP Security Port Protect¾ Bpdu Filter ¾ TC Protect¾ Bpdu Protect Loop Protect Root ProtectTC Protect Bpdu ProtectTC Protect 11 TC ProtectOn Spanning Tree→STP Config→STP Config On Spanning Tree→STP Config→Port ConfigApplication Example for STP Function On Spanning Tree→MSTP Instance→InstanceBridge of Instance Configure Switch D ¾ Suggestion for Configuration ¾ Multicast Address Multicast¾ Multicast Overview ¾ Multicast Address Table Multicast IP PortIgmp Snooping ¾ Igmp Snooping¾ Igmp Snooping Process ¾ Igmp MessagesSnooping Config ¾ Igmp Snooping Fundamentals¾ Igmp Snooping Status Description Displays Igmp Snooping status MemberIgmp Snooping Fast LeaveRouter Port Time Member Port TimeLeave Time Static Router PortSnooping→Snooping Config and Port Config Multicast→IGMP Snooping→VLAN ConfigMulticast Vlan Router Port¾ Multicast Vlan On the Multicast→IGMP Snooping→Snooping Config Application Example for Multicast VlanVlan Multicast→IGMP Snooping→Multicast Vlan¾ Configuration Procedure Step Operation Description Snooping→Port ConfigSnooping→Snooping Config Multicast IPMulticast IP Table Static Multicast IP¾ Create Static Multicast ¾ Static Multicast IP TableMulticast Filter IP-Range¾ Port Filter Config Port FilterMulticast→Multicast Filter→Port Filter Packet StatisticsMulticast→Multicast Filter→IP-Range ¾ Igmp Statistics ¾ QoS ¾ Priority ModeQoS ¾ Schedule Mode 802.1Q frameSP-Mode ¾ Port Priority Config DiffServPort Priority Displays the LAG number which the port belongs toSchedule Mode ¾ Schedule Mode Config¾ Priority Level ¾ 802.1P Priority Config3 802.1P Priority Dscp Priority ¾ Dscp Priority Config It ranges from 0 toPriority Level Priority levels are labeled as TC0, TC1, TC2 and TC3Rate Limit ¾ Rate Limit ConfigBandwidth Control Egress Ratebps Storm ControlIngress Rate bps ¾ Storm Control Config Broadcast RateBps Multicast RateNumber OUI Address Vendor ¾ Port Voice Vlan ModeVoice Vlan ¾ Security Mode of Voice Vlan Packet Type Processing ModeGlobal Config 12 Global ConfigurationPort Mode 13 Port ConfigOUI Config Required. On VLAN→802.1Q VLAN→Port Config Optional. On QoS→Voice VLAN→OUI Config page, youRequired. On QoS→Voice VLAN→Port Config Required. On QoS→Voice VLAN→Global ConfigACL Time-RangeTime-Range Summary IndexTime-Range Create ACL Config Holiday Config¾ Create Holiday ¾ Holiday TableACL Summary ACL Create¾ Rule Table ¾ Create ACLMAC ACL ¾ Create MAC ACLRule ID EtherTypeStandard-IP ACL ¾ Create Standard-IP ACLFragment MaskExtend-IP ACL ¾ Create Extend-IP ACLPolicy Config Policy SummaryPolicy Create Action CreateSelect Policy Desired policy, please click the Delete button11 Action Create ¾ Create ActionPolicy Binding Binding TablePort Binding ¾ Policy Bind TableEnter the ID of the Vlan you want to bind Vlan BindingDirection Displays the binding direction Application Example for ACL ¾ VLAN-Bind TableOn ACL→ACL Config→ACL Create page, create ACL On ACL→ACL Config→Standard-IP ACL page, select ACL Network Security IP-MAC BindingManual Binding ¾ Manual Binding Option Enter the Vlan IDProtect Type Select the Protect Type for the entry ¾ Manual Binding TableARP Scanning Dhcp Snooping Start IP AddressEnd IP Address ScanNetwork diagram for DHCP-snooping implementation ¾ Dhcp Working Principle¾ Option Dhcp Cheating Attack Implementation Procedure ¾ Dhcp Cheating Attack163 ¾ Option 82 Config ¾ Port Config Port SelectDecline Threshold Decline Flow Control Customization Circuit ID Remote ID¾ Cheating Gateway ARP Inspection¾ Imitating Gateway 10 ARP Attack Cheating Gateway ¾ Cheating Terminal Hosts¾ Man-In-The-Middle Attack ¾ ARP Flooding Attack ¾ Trusted Port ARP Detect¾ ARP Detect Network Security→ARP ARP DefendRequired. On the Network Security→IP-MAC ARP Statistics ¾ ARP DefendDefend SpeedIP Source Guard ¾ Illegal ARP Packet¾ IP Source Guard Config DoS DefendDoS Attack Type Description DoS Defend DoS Detect11.5 Detect TimeDetect Attack Type¾ The Mechanism of an 802.1X Authentication System ¾ 802.1X Authentication Procedure178 179 ¾ 802.1X Timer ¾ Guest VlanAuthentication Method 802.1XGuest Vlan Guest Vlan IDRetry Times Supplicant TimeoutServer Timeout Control Mode Radius ServerControl Type AuthorizedOn the Network Security→802.1X→Global Config 802.1X Client SoftwareRequired. On the Network Security→802.1X→Radius Required. On the Network Security→802.1X→PortSnmp ¾ Snmp Overview¾ Snmp Management Frame ¾ Snmp Versions¾ Snmp Configuration Outline ¾ MIB Introduction¾ Remote Engine Snmp Config¾ Local Engine Snmp View MIB Object IDView Type View Name¾ Group Config Snmp GroupSnmp User ¾ Group TableAuth Mode Auth PasswordPrivacy Mode Privacy PasswordSnmp Community ¾ Community ConfigAccess Required. On the SNMP→SNMP Config→Global Required. On the SNMP→SNMP Config→SNMPMIB View ¾ Community TableOn the SNMP→SNMP Config→SNMP NotificationTimeout UDP PortUser RetryRmon Group Function Rmon¾ Rmon Group ¾ History Control Table Event ConfigHistory Control Alarm Config ¾ Event TableVariable Sample TypeRising Threshold Rising Event200 Cluster ¾ Cluster Role¾ Introduction to Cluster 13.1 NDPNeighbor Info ¾ Neighbor Info NDP Summary¾ Neighbor ¾ Port Status Displays the port number of the switch NDPAging Time NDP ConfigDetail ： Port Displays the port number of the switch NtdpDevice Table Displays NDP status of the current portNtdp Summary Ntdp Summary Ntdp Hops Ntdp ConfigNtdp Interval Time Cluster Summary EnableCluster ¾ Global Config Cluster ¾ Cluster Config¾ Global Cluster ¾ Member InfoSwitch 11 Cluster Summary for Member Switch¾ Role Change Cluster Config¾ Current Role 14 Cluster Configuration for Commander Switch Member Config 16 Cluster Configuration for Individual SwitchCluster Topology ¾ Create MemberDevice Name Member MAC18 Collect Topology ¾ Graphic ShowApplication Example for Cluster Function On Cluster→NDP→NDP Config page, enable NDP On Cluster→NTDP→NTDP Config page, enable220 CPU Monitor MaintenanceSystem Monitor Memory Monitor 14.2 Log Content Log TableTime Module¾ Local Log Config Local LogRemote Log Log BufferHost IP Backup Log¾ Log Host ¾ Backup Log Device DiagnoseCable Test ¾ Cable TestError Switch is availableLoopback Length¾ Ping Config Network DiagnosePing Test¾ Tracert Config TracertConfigure the Hyper Terminal System Maintenance via FTPHardware Installation 232 Download Firmware via bootrom menu 5Port SettingsTP-LINK ifconfig ip 172.31.70.22 mask 255.255.255.0 gateway TP-LINK upgrade You can only use the port 1 to upgradeTP-LINK start Start User Access Login Appendix a Specifications Appendix B Configuring the PCs Configure TCP/IP component238 Now Installation Guide Appendix C 802.1X Client Software241 242 Uninstall Software Figure C-7 InstallShield Wizard CompleteConfiguration Figure C-10 Uninstall Complete245 Figure C-15 Connection Status FAQ Appendix D Glossary Multicast Switching Group Attribute Registration Protocol GarpIeee 802.1D Ieee 802.1QPort Authentication Remote Authentication Dial-in User Service RadiusLink Aggregation Link Aggregation Control Protocol LacpSimple Network Management Protocol Snmp Simple Network Time Protocol SntpSpanning Tree Algorithm STA Telnet
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