GarrettCom Magnum MNS-6K - Manual (Page 203)

M A G N U M 6 K S W I T C H E S , M N S - 6 K U S E R G U I D E
• Multicast forwarding is done based on MAC addresses – so datagram to IP addresses
224.1.2.3 and 239.129.2.3 can be forwarded on the same port groups. It is not possible to
do forwarding based on IP addresses as the Magnum 6K family of switches operate at
Layer-2
• Magnum 6K family of switches, configured for IGMP L2 are aware of IP address range
224.0.0.x as well as MAC address range 01:00:5e:00:00:xx aware as required by RFC 4541
• The Magnum 6K family of switches, configured for IGMP L2 support forwarding to
ports on which multicast routers are attached in addition to the ports where IGMP joins
have been received. Thus IGMP L2 and IGMP L3 networks can co-exist
• The Magnum 6K family of switches, configured for IGMP L2 are aware of topology
changes, so new queries can be sent or tables updated to ensure robustness
Configuring IGMP
Syntax igmp – IGMP configuration mode
Syntax igmp - enable or disable IGMP on the switch
Syntax show igmp – IGMP operation status
Syntax mcast - enable or disable unknown multicast streams. The default is enabled
Syntax set igmp mode= - set the IGMP mode. Normal is when a L3 device is in the
network and is the IGMP root. The IGMP-L2 is used when there is no L3 device in the network
Magnum6K25#
igmp
Magnum6K25(igmp)##
igmp enable
IGMP is enabled
Magnum6K25(igmp)##
show igmp
IGMP State
: Enabled
ImmediateLeave : Disabled
Querier : Enabled
Querier Interval : 125
Querier Response Interval : 10
Multicasting unknown streams : Enabled
Magnum6K25(igmp)##
mcast disable
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