Moxa Technologies EDS-508 user manual Configuring Multicast Filtering, Igmp Multicast Filtering

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EDS-508 Series User’s Manual

Featured Functions

Multicast Filtering and MOXA EtherDevice Switch

Your Switch uses IGMP (Internet Group Management Protocol) Snooping to provide support for automatic multicast filtering. It also supports IGMP query mode.

Snooping Mode

Snooping Mode allows your Switch to forward multicast packets only to the appropriate ports. The Switch “snoops” on exchanges between end-stations and an IGMP device, typically a router, to find those ports that would like to join a multicast group, and then sets its filters accordingly.

Query Mode

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

NOTE

EDS is compatible with any device that conforms to the IGMP v2 and IGMP v3 protocol.

IGMP Multicast Filtering

IGMP is the system that all IP-supporting network devices use to register end-stations 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. It works as follows:

1.The IP router (or querier) periodically sends query packets to all the end-stations in the LANs or VLANs that are connected to it. If your network has more than one IP router, then the one with the lowest IP address becomes the querier. The Switch can be the IGMP querier and will become so if its own IP address is lower than that of any other IGMP queriers connected to the LAN or VLAN.

2.When an IP end-station 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 learns that the port is to forward traffic for the multicast group and then forwards 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 Switch units only forward the traffic to ports that received a report packet.

Enabling IGMP Snooping

You can enable or disable IGMP Snooping and IGMP querying using the serial console or the Web interface. If IGMP Snooping is not enabled then IP multicast traffic is always forwarded. That is, it floods the network.

Configuring Multicast Filtering

IGMP (Internet Group Management Protocol) is important in industrial networking, and may be used with some field bus protocols over Ethernet such as Allen-Bradley, EtherNet/IP, Siemens Profibus, and Foundation Fieldbus HSE (High Speed Ethernet). These industrial Ethernet protocols use publisher/subscriber communications models by multicasting packets that could

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Contents Moxa EtherDevice Switch User’s Manual EDS-508 Series Second Edition, NovemberTrademarks Moxa EtherDevice Switch EDS User’s ManualCopyright Notice DisclaimerTable of Contents Chapter EDS Configurator GUI Introduction Inside the Future of Industrial Ethernet Technology Moxa EtherDevice SwitchPackage Checklist Industrial vs. CommercialAdvanced Industrial Networking Capability FeaturesUseful Utility and Remote Configuration Designed for Industrial ApplicationsPage Getting Started Using the RS-232 Serial Console 115200, None, 8, 1, VT100 Connection CautionEDS-508 Series User’s Manual Getting Started Using the Telnet Console Key FunctionEDS-508 Series User’s Manual Getting Started Using Web Configuration For details Page Featured Functions Switch Location Setting Descriptions Factory Default Configuring Basic SettingsSwitch Name Setting Descriptions Factory Default Switch Description Setting Descriptions Factory DefaultSetting Descriptions Factory Default PasswordDisable Telnet/Web Console Account Name# Hosts on the specific subnet can access the NE-4000T Accessible IPPassword Setting # Any host can access the NE-4000TPort Enable/Disable PortName Port Type Port Transmission SpeedFDX Flow Control Switch Subnet Mask Auto IP ConfigurationSwitch IP Address Default GatewayTime Current Time Setting Description Factory DefaultDNS IP Address Time Zone Setting Description Factory Default Current Date Setting Description Factory DefaultSystem Up Time Tftp Server IP/Name Setting Description Factory Default System File Update-By Remote TftpLog file path and name Setting Description Factory Default Configuration File Import System File Update-By Local Import/ExportConfiguration File Export Log File ExportFactory Default Using Port TrunkingConcept of Port Trunking Port Trunking Settings Configuring Port TrunkingTrunking settings Port setting information Using SnmpEnable/Disable V1, V2c Read Community Configuring Snmp Snmp Read/Write SettingsSnmp Versions V1, V2c Read/Write CommunityUser Auth. Type For Snmp V1, V2c, V3 and V3 only Admin Auth. Type For Snmp V1, V2c, V3 and V3 onlyAdmin Data Encryption Key For Snmp V1, V2c, V3 and V3 only User Data Encryption Key For Snmp V1, V2c, V3 and V3 onlyPrivate MIB information Using Communication RedundancyTrap Settings Concept of Turbo RingWhen the number of EDS units in the Turbo Ring is even Page Switch a Coupler Configuring Turbo Ring Concept of STP/RSTP What is STP? How STP Works STP RequirementsHow Rstp Differs from STP STP ConfigurationSTP Reconfiguration Port Speed Path Cost 802.1D Edition 802.1w-2001Using STP on a Network with Multiple VLANs STP ExampleConfiguring STP/RSTP Bridge priority Root/Not RootProtocol of Redundancy Hello time secMax. Age sec Enable STP per PortConfiguration Limits of RSTP/STP Port PriorityConcept of Traffic Prioritization Using Traffic PrioritizationWhat is Traffic Prioritization? How Traffic Prioritization WorksIeee 802.1p Priority Level Ieee 802.1D Traffic Type Differentiated Services DiffServ Traffic MarkingTraffic Prioritization QoS Classification Configuring Traffic PrioritizationTraffic Queues Inspect TOS Default Port PriorityQueuing Mechanism Inspect COSCoS Mapping TOS/DiffServ MappingConcept of Virtual LAN Vlan Using Virtual LANWhat is a VLAN? Benefits of VLANsCommunication Between VLANs VLANs and Moxa EtherDevice SwitchManagement Vlan VLANs Tagged and Untagged MembershipSample Applications of VLANs using Moxa EtherDevice Switch Device a Switch a Switch BConfiguring 802.1Q Vlan Vlan Port SettingsPort Fixed Vlan List Tagged Management Vlan SettingPort Pvid Port Forbidden Vlan ListConcept of Multicast Filtering Using Multicast FilteringWhat is an IP Multicast? Vlan TableMulticast Filtering Network without multicast filteringIgmp Multicast Filtering Configuring Multicast FilteringMulticast Filtering and Moxa EtherDevice Switch Enabling Igmp SnoopingIgmp Snooping Enable per Vlan Igmp Snooping Settings Querier intervalIgmp Snooping Enable Global Static Multicast Router PortIgmp Table Using Rate LimitingAdd Static Multicast MAC Add New Static Multicast Address to the ListRate of Low Priority Queue Configuring Rate LimitingIngress Policy Rate of Normal Priority QueueRate of Medium Priority Queue Using Port LockAdding a Static Unicast MAC Address Rate of High Priority QueueConfiguring Email Warning Using Auto WarningConfiguring Port Lock Add Static Unicast MAC AddressActivate your settings and test email if necessary Email Alarm Events SettingsConfiguring Email Settings Event TypesMoxaEtherDeviceSwitch0001@SwitchLocation Email SettingsPort Event Mail Server IP/Name Configuring Relay WarningConfiguring Relay Event Types Email AddressRelay Alarm Events Settings Activate your settingsRelay Alarm List Using Line-Swap-Fast-RecoveryOverride relay alarm settings Configuring Line-Swap Fast Recovery Using Set Device IPEnable Line-Swap-Fast-Recovery Configuring Set Device IP Set up the connected devicesDesired IP Address Using DiagnosisMirror Port Output data streamMonitor by Switch Using MonitorPing Monitor by Port Using the MAC Address Table ALLUsing Event Log Page EDS Configurator GUI Starting EDS Configurator Broadcast SearchSearch by IP address Upgrade Firmware Modify IP AddressExport Configuration Import Configuration Unlocked Unlock ServerLocked BlankLocked Fixed FixedUnlocked Fixed MIB Groups Page Interface SpecificationsTechnology Optical FiberEnvironment PowerMechanical Regulatory ApprovalsService Information Moxa Internet Services Following services are providedMoxa Product % EDS-508 Problem Report FormSerial Number Product Return Procedure
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