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| Chapter 24 Multicast |
| Table 63 Advanced Application > Multicast > Multicast Setting (continued) | |
| LABEL | DESCRIPTION |
| Fast Leave | Enter an IGMP fast leave timeout value (from 200 to 6,348,800) in |
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| miliseconds. Select this option to have the Switch use this timeout to |
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| update the forwarding table for the port. |
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| In fast leave mode, right after receiving an IGMP leave message from a |
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| host on a port, the Switch sends out an IGMP |
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| (GSQ) message to determine whether other hosts connected to the port |
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| should remain in the specific multicast group. This helps speed up the |
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| leave process. |
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| This defines how many seconds the Switch waits for an IGMP report |
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| before removing an IGMP snooping membership entry when an IGMP |
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| leave message is received on this port from a host. |
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| Group Limited | Select this option to limit the number of multicast groups this port is |
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| allowed to join. |
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| Max Group | Enter the number of multicast groups this port is allowed to join. Once a |
| Num. | port is registered in the specified number of multicast groups, any new |
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| IGMP join report frame(s) is dropped on this port. |
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| Throttling | IGMP throttling controls how the Switch deals with the IGMP reports |
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| when the maximum number of the IGMP groups a port can join is |
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| reached. |
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| Select Deny to drop any new IGMP join report received on this port |
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| until an existing multicast forwarding table entry is aged out. |
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| Select Replace to replace an existing entry in the multicast forwarding |
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| table with the new IGMP report(s) received on this port. |
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| IGMP Filtering | Select the name of the IGMP filtering profile to use for this port. |
| Profile | Otherwise, select Default to prohibit the port from joining any |
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| multicast group. |
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| You can create IGMP filtering profiles in the Multicast > Multicast |
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| Setting > IGMP Filtering Profile screen. |
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| IGMP Querier | The Switch treats an IGMP query port as being connected to an IGMP |
| Mode | multicast router (or server). The Switch forwards IGMP join or leave |
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| packets to an IGMP query port. |
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| Select Auto to have the Switch use the port as an IGMP query port if |
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| the port receives IGMP query packets. |
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| Select Fixed to have the Switch always use the port as an IGMP query |
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| port. Select this when you connect an IGMP multicast server to the |
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| port. |
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| Select Edge to stop the Switch from using the port as an IGMP query |
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| port. The Switch will not keep any record of an IGMP router being |
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| connected to this port. The Switch does not forward IGMP join or leave |
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| packets to this port. |
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| Apply | Click Apply to save your changes to the Switch’s |
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| Switch loses these changes if it is turned off or loses power, so use the |
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| Save link on the top navigation panel to save your changes to the non- |
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| volatile memory when you are done configuring. |
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| Cancel | Click Cancel to begin configuring this screen afresh. |
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| 231 |
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