Moxa Technologies EDS-726 user manual Multicast Filtering and Moxa EtherDevice Switch, Query Mode

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EDS-726 Series User’s Manual

Featured Functions

Multicast Filtering and MOXA EtherDevice Switch

EDS-726 has three ways to achieve multicast filtering: IGMP (Internet Group Management Protocol) Snooping, GMRP (GARP Multicast Registration Protocol), and adding a static multicast MAC manually to filter multicast traffic automatically.

IGMP (Internet Group Management Protocol)

Snooping Mode

Snooping Mode allows your switch to forward multicast packets only to the appropriate ports. The switch “snoops” on exchanges between hosts and an IGMP device, such as a router, to find those ports that want to join a multicast group, and then configures its filters accordingly.

Query Mode

Query mode allows the EDS-726 to work as the Querier if it has the lowest IP address on the subnetwork to which it belongs. IGMP querying is enabled by default on the EDS-726 to help prevent interoperability issues with some multicast routers that may not follow the lowest IP address election method. Enable query mode to run multicast sessions on a network that does not contain IGMP routers (or queriers).

NOTE

EDS-726 is compatible with any device that conforms to the IGMP v2 and IGMP v3 device

 

protocol.

 

 

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)

EDS-726 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

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Contents First Edition, July Moxa EtherDevice Switch EDS-726 Series User’s ManualDisclaimer Copyright NoticeTrademarks Table of Contents Chapter EDS Configurator GUI Introduction Industrial Networking Capability Package ChecklistFeatures OverviewRecommended Software and Accessories Useful Utility and Remote ConfigurationGetting Started Connection Caution RS-232 Console Configuration 115200, None, 8, 1, VT100EDS-726 Series User’s Manual Key Function Configuration by Telnet Console Configuration by Web Browser EDS-726 Series User’s Manual Disabling Telnet and Browser Access Featured Functions System Identification Configuring Basic SettingsSwitch Description PasswordSwitch Name Switch LocationAccount PasswordAllowable Hosts Input format Accessible IPAny host on a specific subnetwork can access the EDS-726 Any host can access the EDS-726Name EnablePort DescriptionPort Type NetworkPort Transmission Speed FDX Flow ControlDefault Gateway Auto IP ConfigurationSwitch IP Address Switch Subnet MaskSystem Up Time TimeCurrent Time Current DateSystem File Update-By Remote Tftp System File Update-By Local Import/Export Factory Default Using Port TrunkingSystem File Update-By CF Card Port Trunking Concept Configuring Port Trunking Member Ports/Available Ports Setting DescriptionTrunk Group Maximum of 4 trunk groups Trunk TypeSnmp Configuring SnmpV1, V2c Write/Read Community Snmp Read/Write SettingsSnmp Versions V1, V2c Read CommunityTrap Server IP/Name Trap SettingsGigabit Ethernet Redundant Ring Capability 300 ms Using Communication RedundancySwitch Object ID Private MIB informationTurbo Ring Concept Initial SetupWhen the number of EDS-726 units in the Turbo Ring is even Ring Coupling Configuring Turbo Ring STP/RSTP Concept What is STP? Port Speed Path Cost 802.1D Edition 802.1w-2001 How STP WorksSTP Requirements STP Calculation STP ConfigurationSTP Reconfiguration Differences between Rstp and STPSTP Example Using STP on a Network with Multiple VLANsConfiguring STP/RSTP Bridge priority Forwarding DelayRoot/Not Root Protocol of RedundancyPort Cost Configuration Limits of RSTP/STPEnable STP per Port Port PriorityHow Traffic Prioritization Works Using Traffic PrioritizationWhat is Traffic Prioritization? Traffic Prioritization ConceptTraffic Prioritization Differentiated Services DiffServ Traffic MarkingIeee 802.1p Priority Level Ieee 802.1D Traffic Type Traffic Queues Configuring Traffic PrioritizationQoS Classification Inspect COS Default Port PriorityQueuing Mechanism Inspect TOSTOS/DiffServ Mapping Setting Description FactoryCoS Mapping Virtual LAN Vlan Concept Using Virtual LANWhat is a VLAN? Communication Between VLANs VLANs and Moxa EtherDevice SwitchBenefits of VLANs Managing a VlanHUB Sample Applications of VLANs using Moxa EDS-726Vlan Port Settings Configuring 802.1Q Vlan Port Forbidden Vlan List Management Vlan ID Port Pvid Port Fixed Vlan List TaggedBenefits of Multicast Using Multicast FilteringWhat is an IP Multicast? Concept of Multicast FilteringNetwork without multicast filtering Multicast FilteringIgmp Multicast Filtering Multicast Filtering and Moxa EtherDevice SwitchIgmp Internet Group Management Protocol Snooping Mode Query ModeEnabling Multicast Filtering Configuring Igmp SnoopingIgmp Snooping Settings Static Multicast MACIgmp Table Igmp SnoopingStatic Multicast Router Port QuerierJoin Port Add Static Multicast MACAdd New Static Multicast Address to the List NonePort Mode Setting Description Factory Default Configuring GmrpPort Setting Description Factory Default Gmrp enable Setting Description Factory DefaultBroadcast Storm Protection Using Bandwidth ManagementConfiguring Bandwidth Management Gmrp TableStatic Port Lock Using Port Access ControlTraffic Rate Limiting Settings IeeeMessage Exchange 802.1X Configuring IeeeShared Key Database OptionRadius Server Server Port802.1X Re-Authentication 802.1X Re-AuthenticationLocal User Database Setup 802.1X Table Local User Database SetupStatic Port Lock Email Alarm Events Settings Using Auto WarningConfiguring Email Warning Port Event MoxaEtherDeviceSwitch0001@SwitchLocationEvent Types System EventEmail Settings Activate your settings Configuring Relay WarningRelay Alarm Events Settings Configuring Relay Event TypesOverride relay alarm settings Relay Alarm ListEnable Line-Swap-Fast-Recovery Using Line-Swap-Fast-RecoveryUsing Set Device IP Configuring Line-Swap Fast RecoverySet up the connected devices Configuring Set Device IPBi-directional Using DiagnosisMirror Port Output data streamPing Using MonitorMonitor by Switch Monitor by Port Using the MAC Address TableALL Using Event LogEDS Configurator GUI Broadcast Search Starting EDS ConfiguratorSearch by IP address Upgrade FirmwareModify IP Address Export Configuration Import Configuration Unlock Server EDS-726 Series User’s Manual MIB II.5 Icmp Group MIB II.1 System GroupMIB II.2 Interfaces Group MIB II.4 IP GroupMIB II.17 dot1dBridge Group MIB II.10 Transmission GroupMIB II.11 Snmp Group Private Traps Public TrapsInterface Modular Managed Switch System, EDS-72610GMechanical PowerGigabit Ethernet Interface Module, IM series Optical Fiber Fast Ethernet Interface Module, IM seriesInterface Regulatory Approvals EnvironmentalService Information Following services are provided Moxa Internet ServicesSerial Number Problem Report FormProduct Return Procedure
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