Dell Networking S6000 Uživatelský manuál stáhnout pdf (Strana 359)

Figure 40. Membership Reports: Joining and Filtering

Leaving and Staying in Groups

The following illustration shows how multicast routers track and refresh state changes in response to

group-and-specific and general queries.

1. Host 1 sends a message indicating it is leaving group 224.1.1.1 and that the included filter for 10.11.1.1

and 10.11.1.2 are no longer necessary.

2. The querier, before making any state changes, sends a group-and-source query to see if any other

host is interested in these two sources; queries for state-changes are retransmitted multiple times. If

any are, they respond with their current state information and the querier refreshes the relevant state

information.

3. Separately in the following illustration, the querier sends a general query to 224.0.0.1.

4. Host 2 responds to the periodic general query so the querier refreshes the state information for that

Internet Group Management Protocol (IGMP)

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Dell Networking S6000 Uživatelský manuál Strana 359