Managed switches boost network reliability

ET-9MS line of industrial Ethernet managed switches feature automatic switchover on detected failure (ring topology) and now support Internet Group Management Protocol (IGMP) and Virtual Local Area Networks (VLAN).

08/08/2005


Networks

ET-9MS line of industrial Ethernet managed switches feature automatic switchover on detected failure (ring topology) and now support Internet Group Management Protocol (IGMP) and Virtual Local Area Networks (VLAN). VLANs segregate network devices into functional groups to improve security and performance by allowing devices to talk only to other devices within their VLAN and keeping traffic within the appropriate VLAN. Advanced switches also support IGMP for IP multicast filtering, which is required for some control networks and devices. IGMP lets the switches automatically route messages to only appropriate ports. Switches passively snoop in IGMP router queries and IGMP host reports to determine where to route multicast mes-sages, or can actively send their own queries in place of an IGMP router.

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