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Introduction to the BayStack 410-24T Switch
309985-A Rev 00
1-49
As shown in Figure 1-30, a non-IP Multicast filtering switch causes IP Multicast
traffic to be sent to all segments on the local subnet.
Figure 1-30. IP Multicast Propagation With IGMP Routing
The BayStack 410-24T switch can automatically set up IP Multicast filters so the
IP Multicast traffic is only directed to the participating end nodes (see
Figure 1-31
).
In Figure 1-31
, switches S1 to S4 represent a LAN connected to a 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