Configuring the ECN330-switch
354 1553-KDU 137 365 Uen D 2006-06-16
Figure 145 IGMP Protocol
6.16.2 Layer 2 IGMP (Snooping and Query)
IGMP Snooping and Query – If multicast routing is not supported on other
switches in the network, use IGMP Snooping and IGMP Query (page 355) to
monitor IGMP service requests passing between multicast clients and servers,
and dynamically configure the ECN330 ports which need to forward multicast
traffic.
Static IGMP Router Interface – If IGMP snooping cannot locate the IGMP
querier, manually designate a known IGMP querier (that is, a multicast router/
switch) connected over the network to an interface on the ECN330. This
interface will then join all the current multicast groups supported by the attached
router/switch to ensure that multicast traffic is passed to all appropriate
interfaces within the ECN330.
Static IGMP Host Interface – To control multicast applications more carefully,
manually assign a multicast service to specific interfaces on the ECN330
(page 361).
IGMP Query (Layer 2 or 3) – IGMP Query can only be enabled globally at Layer
2, but can be enabled for individual VLAN interfaces at Layer 3 (page 362).
However, note that Layer 2 query is disabled if Layer 3 query is enabled.
L3 - network core
(multicast routing)
L2 - edge switches
(snooping and query)
L2 switch to end nodes
(snooping on IGMP clients)
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