ZyXEL Communications GS2220-10, Руководство пользователя

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Chapter 61 Switching
GS2220 Series User’s Guide
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Figure 370 Switching > Multicast > IGMP Snooping
The following table describes the labels in this screen.
Table 258 Switching > Multicast > IGMP Snooping
LABEL DESCRIPTION
IGMP Snooping Use these settings to configure IGMP snooping.
Active Select ON to enable IGMP Snooping to forward group multicast traffic only to ports that are
members of that group.
Querier IGMP Snooping Querier is used in the absence of an IP multicast router. For example, in a
network where IP multicast is configured, the IP multicast router acts as the IGMP Snooping
Querier. If the multicast traffic in a VLAN only needs to be Layer 2 switched, an IP multicast
router is NOT required. But without an IP multicast router on the VLAN, you must configure the
Switch as the IGMP Snooping Querier so that it can send queries.
Select this option to allow the Switch to send IGMP General Query messages to the VLANs with
the multicast hosts attached.
Querier Version IGMP snooping query works only when both host and Switch support the same IGMP version.
Select v2 to allow the Switch to send IGMPv2 queries only.
Select v3 to allow the Switch to send IGMPv3 queries only.
Host Timeout Specify the time (from 1 to 16711450) in seconds that elapses before the Switch removes an
IGMP group membership entry if it does not receive report messages from the port.
802.1p Priority Select a priority level (0 – 7) to which the Switch changes the priority in outgoing IGMP control
packets. Otherwise, select
No-Change to not replace the priority.