H3C S5500-SI Series, Руководство пользователя

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Operation Manual – Multicast Protocol
H3C S5500-SI Series Ethernet Switches
Chapter 1 IGMP Snooping Configuration
1-12
To do... Use the command... Remarks
Enter system view system-view —
Enter Ethernet
port view interface interface-type
interface-number
Enter
the
corre
spon
ding
view
Enter port
group view
port-group { manual
port-group-name | aggregation
agg-id }
Use either
command
Enable the fast leave
feature igmp-snooping fast-leave [ vlan
vlan-list ]
Required
Disabled by default
Caution:
If the fast leave feature is enabled on a port to which more than one host is connected,
when one host leaves a multicast group, the other hosts connected to port and
interested in the same multicast group will fail to receive multicast data for that group.
1.4.5 Configuring IGMP Report Suppression
When a Layer 2 device receives an IGMP report from a multicast group member, the
device forwards the message to the Layer 3 device directly connected with it. Thus,
when multiple members belonging to a multicast group exit on the Layer 2 device, the
Layer 3 device directly connected with it will receive duplicate IGMP reports from these
members.
With the IGMP report suppression function enabled, within a query interval, the Layer 2
device forwards only the first IGMP report of a multicast group to the Layer 3 device and
will not forward the subsequent IGMP reports from the same multicast group to the
Layer 3 device. This helps reduce the number of packets being transmitted over the
network.
Follow these steps to configure IGMP report suppression:
To do... Use the command... Remarks
Enter system view system-view —
Enter IGMP Snooping
view
igmp-snooping —
Enable IGMP report
suppression
report-aggregation
Optional
Enabled by default