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
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, SL, SLX, EK and EF series all support IGMP V1 and V2. The EL Series supports IGMP 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 or 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.
- By default, IGMP V2 is enabled in all EL series switches. To confirm that it is still enabled and adjust any other IGMP settings as desired, proceed to step 2.
- Log into the switch from your Web browser. The default username and password are admin/admin.
- In the menu on the left side, expand the IGMP Snooping menu, then click on the IGMP Configuration menu.
- From this screen, you can enable/disable IGMP, set the IGMP version, and various other settings. Generally, these settings can be left at the defaults unless your network administrator has instructed otherwise.
- After making the desired changes, click Apply to activate the changes.
- To save your changes and make them active at startup, go to the system menu and under File management select Copy Operations.
- From the drop-down list, select Running-config to startup-config.
- Select the configuration file used at startup (e.g., startup1.cfg) and click Apply.
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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