Moxa Technologies PT-7728 user manual Configuring Igmp Snooping, Igmp Multicast Filtering

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PT-7728 User’s Manual

Featured Functions

IGMP Multicast Filtering

IGMP is used by IP-supporting network devices to register hosts with multicast groups. It can be used on all LANs and VLANs that contain a multicast capable IP router, and on other network devices that support multicast filtering. IGMP works as follows:

1.The IP router (or querier) periodically sends query packets to all end-stations on the LANs or VLANs that are connected to it. For networks with more than one IP router, the router with the lowest IP address is the querier. A switch with IP address lower than the IP address of any other IGMP queriers connected to the LAN or VLAN can become the IGMP querier.

2.When an IP host receives a query packet, it sends a report packet back that identifies the multicast group that the end-station would like to join.

3.When the report packet arrives at a port on a switch with IGMP Snooping enabled, the switch knows that the port should forward traffic for the multicast group, and then proceeds to forward the packet to the router.

4.When the router receives the report packet, it registers that the LAN or VLAN requires traffic for the multicast groups.

5.When the router forwards traffic for the multicast group to the LAN or VLAN, the switches only forward the traffic to ports that received a report packet.

GMRP (GARP Multicast Registration Protocol)

The PT-7728 supports IEEE 802.1D-1998 GMRP (GARP Multicast Registration Protocol), which differs from IGMP (Internet Group Management Protocol). GMRP is a MAC-based multicast management protocol, whereas IGMP is IP-based. GMRP provides a mechanism that allows bridges and end stations to register or de-register Group membership information dynamically. GMRP functions similarly to GVRP, except that GMRP registers multicast addresses on ports. When a port receives a GMRP-joinmessage, it will register the multicast address to its database if the multicast address is not registered, and all the multicast packets with that multicast address are able to be forwarded from this port. When a port receives a GMRP-leavemessage, it will de-register the multicast address from its database, and all the multicast packets with this multicast address are not able to be forwarded from this port.

Static Multicast MAC

Some devices may only support multicast packets, but not support either IGMP Snooping or GMRP. The PT-7728 supports adding multicast groups manually to enable multicast filtering.

Enabling Multicast Filtering

Use the serial console or Web interface to enable or disable IGMP Snooping and IGMP querying. If IGMP Snooping is not enabled, then IP multicast traffic is always forwarded, flooding the network.

Configuring IGMP Snooping

IGMP Snooping provides the ability to prune multicast traffic so that it travels only to those end destinations that require that traffic, thereby reducing the amount of traffic on the Ethernet LAN.

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Contents First Edition, February Moxa Inc Moxa PowerTrans Switch PT-7728 User’s ManualTrademarks Copyright NoticeDisclaimer Table of Contents Appendix a MIB Groups Appendix B Specifications Introduction ‰ Overview ‰ Package Checklist ‰ Software FeaturesSoftware Features Package ChecklistOverview Getting Started Serial Console Configuration 115200, None, 8, 1, VT100 PT-7728 User’s Manual Getting Started Key Function Configuration by Telnet ConsolePT-7728 User’s Manual Getting Started PT-7728 User’s Manual Getting Started Configuration by Web Browser Disabling Telnet and Browser Access Featured Functions System Identification Configuring Basic SettingsPassword PasswordAccount Grant access to one host with a specific IP address Accessible IPGrant access to any host on a specific subnetwork Hosts That Need Access Input FormatPort EnableDescription NameSpeed NetworkFDX Flow Ctrl Switch IP Address Auto IP ConfigurationSwitch Subnet Mask Default GatewayDaylight Saving Time TimeCurrent Time Current DateSystem File Update-By Remote Tftp Tftp Server IP/Name Configuration Files Path and NameFirmware Files Path and Name Log Files Path and NameFactory Default System File Update-By Local Import/ExportPort Trunking Concept Using Port TrunkingTrunk Group Maximum of 4 trunk groups Configuring Port TrunkingTrunk Type Available Ports/Member PortsSetting Description Configuring SnmpTrunk Table Snmp Versions Snmp Read/Write SettingsV1, V2c Read Community V1, V2c Write/Read Community1st Trap Server IP/Name Setting Description Factory Default Setting Description Factory DefaultPrivate MIB information Using Communication RedundancyTurbo Ring Concept Initial setup for Turbo Ring or Turbo RingTurbo Ring with odd number switches Determining the Redundant Path for Turbo Ring Ring Coupling ConfigurationSwitch B Dual-Homing Configuration for Turbo Ring Configuring Turbo Ring and Turbo RingConfiguring Turbo Ring Master/Slave Now ActiveRedundancy Protocol Set as MasterCoupling Port Enable Ring CouplingCoupling Control Port Ring 1/2-Status Enable RingRing 1/2-1st Ring Port Status Ring 1/2-2nd Ring Port Status Coupling-ModePrimary/Backup Port Coupling ModeSTP/RSTP Concept What is STP?PT-7728 User’s Manual Featured Functions How STP Works STP ConfigurationSTP Requirements Port Speed Path Cost 802.1D Edition 802.1w-2001Differences between Rstp and STP STP ReconfigurationSTP Example Using STP on a Network with Multiple VLANs Root/Not Root Configuring STP/RSTPProtocol of Redundancy Bridge PriorityEnable STP per Port Forwarding DelayHello Time sec Max. Age secConfiguration Limits of RSTP/STP Using Traffic PrioritizationWhat is Traffic Prioritization? Traffic Prioritization ConceptIeee 802.1p Priority Level Ieee 802.1D Traffic Type How Traffic Prioritization WorksTraffic Prioritization Differentiated Services DiffServ Traffic MarkingTraffic Queues QoS Classification Configuring Traffic PrioritizationQueuing Mechanism Inspect TOSCoS Mapping Setting Description FactoryTOS/DiffServ Mapping Inspect COSWhat is a VLAN? Using Virtual LANVirtual LAN Vlan Concept Benefits of VLANs VLANs and the PowerTransManaging a Vlan Communication Between VLANsVLANs Tagged and Untagged Membership Sample Applications of VLANs using PT-7728PT-7728 User’s Manual Featured Functions Vlan Settings Configuring Virtual LANManagement Vlan ID Port Type What is an IP Multicast? Using Multicast Filtering Concept of Multicast Filtering Vlan TableMulticast Filtering Benefits of MulticastNetwork without multicast filtering Igmp Internet Group Management Protocol Snooping Mode Multicast Filtering and Moxa PowerTrans SwitchQuery Mode Network with multicast filteringIgmp Multicast Filtering Configuring Igmp SnoopingGmrp Garp Multicast Registration Protocol Static Multicast MACIgmp Snooping Settings Add Static Multicast MAC Configuring Gmrp Using Bandwidth ManagementGmrp enable Gmrp TableTraffic Rate Limiting Settings Configuring Bandwidth Management Broadcast Storm ProtectionIngress Configuring Static Port Lock Using Port Access ControlStatic Port Lock IeeeDatabase Option Configuring IeeeRadius Server Server PortLocal User Database Setup 802.1X Re-AuthenticationPort Access Control Table Using Auto WarningLocal User Database Setup Event Type Configuring Email WarningMoxaPowerTransSwitch0001@SwitchLocation Email SetupPort Events Mail Server IP/NamePassword Setting Configuring Relay WarningAccount Name Email AddressEvent Setup Using Set Device IP Using Line-Swap-Fast-RecoveryConfiguring Line-Swap Fast Recovery Override relay alarm settingsSet up the connected devices Configuring Set Device IPMirror Port Using DiagnosisMonitor by Switch Using MonitorPing Monitor by Port Using the MAC Address TableMAC Using Event LogSyslog Server Using SyslogPT-7728 User’s Manual Featured Functions MIB II.2 Interfaces Group MIB II.1 System GroupMIB II.4 IP Group MIB II.5 Icmp GroupMIB II.11 Snmp Group MIB II.10 Transmission GroupMIB II.17 dot1dBridge Group Private Traps Public TrapsTechnology Switch PropertiesInterface Optical Fiber 100BaseFX PowerMechanical WarrantyEnvironmental
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