KBC Networks ESML6-P3 - Manual (Page 28)

Ethernet Switch User Manual
Manual_cmd_line_config-ESML6-P3-Rev1106
Copyright © KBC Networks Ltd. Page 27 of 49 www.kbcnetworks.com
8.2 7.2 IGMP Snooping Configuration
8.2.1 Configuring the IGMP Snooping auto-query function
If there is not a Layer 3 switch or router, the IGMP auto-query function is required. Users
can specify switch(es) as query device(s). The selected query switch(es) periodically send
IGMP query messages to maintain the IGMP multicast routing table. For the reliability of
multicast service, it is recommended that the auto–query function is enabled for all
switches.
In configuration mode, enable the auto-query function of IGMP, using the following
command line.
Enabling the IGMP auto-query function:
SWITCH(config)#igmp auto-query enable
Disable IGMP auto query function:
SWITCH(config)#igmp quto-query disable
8.2.2 Enable/disable IGMP Snooping
SWITCH(config)#igmp enable
8.2.3 Showing information of IGMP Snooping multicast group members
SWITCH#show igmp-snooping
9 DT-Ring Protocol configuration
9.1 Introduction
The DT-Ring family is a set of proprietary protocols that are available on the ESML6-P3
switch. They are customized for industrial needs and provide reliable communication and
fast recovery from link and device failures. DT-Ring is used in a single ring topology to
provide redundancy protection and DT-Ring+ is used to provide backup between two DT-
Rings, collectively they are known as DT-PORT protocols.
DT-Ring uses the ring and port status to ensure a redundant ring without creating a loop.
It can only be used with other KBC switches. If two networks are to be connected where
one is using DT-Ring and the other RSTP, then RSTP Transparent Transmission must be
used.
Figure 9-1 shows a DT-Ring topology where one of the switches is configured as master
and the others as slaves.