3com 4210 PWR 9-Port 3CR17341-91-ME 用户手册
产品代码
3CR17341-91-ME
IGMP Snooping Configuration
201
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Caution:
■
Before enabling IGMP Snooping in a VLAN, be sure to enable IGMP Snooping
globally in system view; otherwise the IGMP Snooping settings will not take
effect.
globally in system view; otherwise the IGMP Snooping settings will not take
effect.
■
If IGMP Snooping and VLAN VPN are enabled on a VLAN at the same time,
IGMP queries are likely to fail to pass the VLAN. You can solve this problem by
configuring VLAN tags for queries. For details, see Configuring a VLAN Tag for
Query Messages.
IGMP queries are likely to fail to pass the VLAN. You can solve this problem by
configuring VLAN tags for queries. For details, see Configuring a VLAN Tag for
Query Messages.
Configuring the Version
of IGMP Snooping
With the development of multicast technologies, IGMPv3 has found increasingly
wide application. In IGMPv3, a host can not only join a specific multicast group but
also explicitly specify to receive or reject the information from a specific multicast
source. Working with PIM-SSM, IGMPv3 enables hosts to join specific multicast
sources and groups directly, greatly simplifying multicast routing protocols and
optimizing the network topology.
wide application. In IGMPv3, a host can not only join a specific multicast group but
also explicitly specify to receive or reject the information from a specific multicast
source. Working with PIM-SSM, IGMPv3 enables hosts to join specific multicast
sources and groups directly, greatly simplifying multicast routing protocols and
optimizing the network topology.
The default IGMP Snooping version is version 2.
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Caution:
■
Before configuring related IGMP Snooping functions, you must enable IGMP
Snooping in the specified VLAN.
Snooping in the specified VLAN.
■
Different multicast group addresses should be configured for different
multicast sources because IGMPv3 Snooping cannot distinguish multicast data
from different sources to the same multicast group.
multicast sources because IGMPv3 Snooping cannot distinguish multicast data
from different sources to the same multicast group.
Configuring Timers
This section describes how to configure the aging timer of the router port, the
aging timer of the multicast member ports.
aging timer of the multicast member ports.
Enter VLAN view
vlan vlan-id
-
Enable IGMP Snooping on
the VLAN
the VLAN
igmp-snooping enable
Required
By default, IGMP Snooping is
disabled on all the VLANs.
disabled on all the VLANs.
Table 146 Enable IGMP Snooping
Operation
Command
Remarks
Table 147
Configure the version of IGMP Snooping
Operation
Command
Remarks
Enter system view
system-view
-
Enter VLAN view
vlan vlan-id
-
Configure the version of IGMP
Snooping
Snooping
igmp-snooping version
version-number
version-number
Optional
Table 148 Configure timers
Operation
Command
Remarks
Enter system view
system-view
-
Configure the aging
timer of the router port
timer of the router port
igmp-snooping
router-aging-time
seconds
router-aging-time
seconds
Optional
By default, the aging time of the router
port is 105 seconds.
port is 105 seconds.