H3C Technologies H3C S3100 Series Switches - Manual (Page 245)

Operation Manual – Multicast
H3C S3100-52P Ethernet Switch Chapter 2 IGMP Snooping Configuration
2-8
Operation Command Description
Configure the query
response timer
igmp-snooping
max-response-time
seconds
Optional
By default, the query
response timeout time is
10 seconds.
Configure the aging timer
of the multicast member
port
igmp-snooping
host-aging-time
seconds
Optional
By default, the aging time
of multicast member ports
is 260 seconds
2.2.3 Enabling IGMP Fast Leave
Normally, when receiving an IGMP Leave message, Switch does not immediately
remove the port from the multicast group but sends an IGMP group-specific query
message. If no response is received in a given period, it then removes the port from the
multicast group.
If IGMP fast leave processing is enabled, when receiving an IGMP Leave message,
Switch immediately removes the port from the multicast group. When a port has only
one user, enabling IGMP fast leave processing on the port can save bandwidth.
Table 2-7
Enable the IGMP fast leave processing
Operation Command Description
Enter system view
system
-view —
Enter Ethernet port view
interface interface-type
interface-number
—
Enable the fast leave from
the specific VLAN for a
port
igmp-snooping
fast-leave
[ vlan
vlan-list
]
Required
By default, the fast leave
from the multicast group
for a port is disabled.
2.2.4 Configuring IGMP Snooping Filtering ACL
You can configure multicast filtering ACLs on the switch ports connected to user ends
so as to use the IGMP Snooping filter function to limit the multicast streams that the
users can access. With this function, you can treat different VoD users in different ways
by allowing them to access the multicast streams in different multicast groups.
In practice, when a user orders a multicast program, an IGMP report message is
generated. When the message arrives at the switch, the switch examines the multicast
filtering ACL configured on the access port to determine if the port can join the
corresponding multicast group or not. If yes, it adds the port to the forward port list of