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To disable a port from becoming a dynamic router port:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view, or
enter port group view.
•
Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view:
interface
interface-type
interface-number
•
Enter port group view:
port-group
manual
port-group-name
Use either command.
3.
Disable the port from
becoming a dynamic router
port.
igmp-snooping
router-port-deny
[
vlan
vlan-list
]
By default, a port can become a
dynamic router port.
NOTE:
This configuration does not affect the static router port configuration.
Configuring an IGMP snooping querier
This section describes how to configure an IGMP snooping querier.
Configuration prerequisites
Before you configure an IGMP snooping querier, complete the following tasks:
•
Enable IGMP snooping in the VLAN.
•
Determine the interval for sending IGMP general queries.
•
Determine the IGMP last-member query interval.
•
Determine the maximum response delay for IGMP general queries.
•
Determine the source address of IGMP general queries.
•
Determine the source address of IGMP group-specific queries.
Enabling IGMP snooping querier
In an IP multicast network that runs IGMP, a multicast router or Layer 3 multicast switch regularly
sends IGMP queries. This allows all Layer 3 multicast devices to establish and maintain multicast
forwarding entries for correctly forwarding multicast traffic at the network layer. This router or Layer 3
switch is called the "IGMP querier."
However, a Layer 2 multicast switch does not support IGMP and therefore cannot send general
queries by default. To provide correct multicast data forwarding at the data link layer on a network
without Layer 3 multicast devices, you can configure a Layer 2 switch as the IGMP snooping querier.
In this way, the Layer 2 switch sends IGMP queries and establishes and maintains multicast
forwarding entries.
Do not configure an IGMP snooping querier in a multicast network that runs IGMP. An IGMP
snooping querier does not take part in IGMP querier elections. However, it might affect IGMP querier
elections because it sends IGMP general queries with a low source IP address. For more information
about IGMP querier, see "
To enable the IGMP snooping querier in a VLAN:
