
Introduction to the BayStack 410-24T Switch
309985-C Rev 00
1-55
As shown in Figure 1-32, a non-IP multicast filtering switch causes IP multicast
traffic to be sent to all segments on the local subnet.
Figure 1-32. IP Multicast Propagation With IGMP Routing
The BayStack 410-24T switch can automatically set up IP multicast filters so the
IP multicast traffic is directed only to the participating end nodes (see
Figure 1-33
).
In Figure 1-33
, switches S1 to S4 represent a LAN connected to an IP multicast
router. The router periodically sends Host Membership Queries to the LAN and
listens for a response from end stations. All of the clients connected to switches
S1 to S4 are aware of the queries from the router.
Non-multicast
filtering switch
Non-multicast
filtering switch
Host
Membership
Report
Multicast stream
BS41026A
Host
Membership
Query
Designated
router #2
Designated
router #1
IGMP
Host
Host
Membership
Report
Host
Membership
Query
Internet
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