Industrial networks often have devices that require support for IGMP. IGMP stands for Internet Group Management Protocol. It is a protocol used to manage the membership of Multicast groups. Multicast data allows the same data to be generated once and then received by many users, similar to listeners of an FM radio station.
- Frequently Asked Questions
- IGMP Configuration
Frequently Asked Questions
Q: Which managed switches support IGMP?
A: All Sixnet Managed switches fully support IGMP.
Q: What versions of IGMP do Sixnet switches support?
A: The ET, SLX, EK and EF series all support IGMP V1 and V2. The EL Series supports V1, V2 and V3.
Q: Do Sixnet switches support IGMP Snooping?
A: Yes. All Sixnet switches support both active and passive IGMP Snooping. Active Snooping actively controls the flow of multicast data; passive snooping only listens to the IGMP messages on the network.
Q: What are the differences between the multicast suppression modes in the ET, SL(X), EK/EF Series?
A: The multicast suppression modes suppress packets as follows:
- None – Multicast packets are sent to all ports unless IGMP is enabled and one or more clients have sent IGMP Report requests.
- IP Multicast Groups – Multicast packets corresponding to IP multicast groups (with MAC addresses starting 01:00:5e) are suppressed unless one of more clients have sent IGMP Report messages. Multicast packets with other addresses (any other packet with a MAC address starting 01) are sent to all ports.
- All Unreserved Multicast – Multicast packets with reserved multicast addresses (01:80:c2:00:00:0x where x is 0..f) are sent to all ports. All other multicast packets are suppressed unless one or more clients have sent IGMP Report messages.
- Note: Beginning in Firmware Version 5.0, IGMP is enabled on all SLX and EK/EF switches.
- Log into the switch from your Web browser. The default username and password: are admin/admin .
- From the Managed Switch menu, click on the Setup menu to see the options, and then click on Multicast Filtering (IGMP). Click on Protocol Settings to begin configuring IGMP.
- On the IGMP Protocol Settings page, click on the IGMP mode drop-down list, and select either Active or Passive IGMP handling. View the FAQ for the differences between those two modes. Typically, Active IGMP handling is used.
- Click on the Multicast suppression drop-down list to select the suppression mode you want to use. Review the FAQs for the differences between these modes. Typically, All Unreserved Multicast is used.
- Click on the IGMP version drop-down list to select IGMP version you want to use. Commonly, Version 2 is used unless your network administrator has instructed otherwise.
- All other settings are generally left at the defaults unless you have been directed otherwise by your network administrator.
- Click Commit Changes to activate IGMP.
- To view the IGMP Group information, click on the Monitoring menu and then choose Multicast Filtering status. On the IGMP Group status page, click on the Page drop-down list to select either the IGMP Port Status or IGMP Group Status pages.
It is the customer's responsibility to review the advice provided herein and its applicability to the system. Red Lion makes no representation about specific knowledge of the customer's system or the specific performance of the system. Red Lion is not responsible for any damage to equipment or connected systems. The use of this document is at your own risk. Red Lion standard product warranty applies.
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