Configuring The Igmp Snooping Querier - HP FlexNetwork 7500 Series Configuration Manual

•
The port that receives the IGMP general query or PIM hello message becomes a dynamic
router port. Before its aging timer expires, this dynamic router port receives all multicast packets
within the VLAN where the port belongs and forwards them to the host. The receiver host will
receive multicast data that it does not want to receive.
•
The IGMP general query or PIM hello message that the host sends affects the multicast routing
protocol state on Layer 3 devices, such as the IGMP querier or DR election. This might further
cause network interruption.
To solve these problems and to improve network security and the control over multicast users, you
can disable a port from becoming a dynamic router port.
To disable a port from becoming a dynamic router port:
Step
Enter system view.
1.
Enter Layer 2 Ethernet
2.
interface view or Layer 2
aggregate interface view.
Disable the port from
3.
becoming a dynamic router
port.

Configuring the IGMP snooping querier

This section describes how to configure an IGMP snooping querier.
Configuration prerequisites
Before you configure the IGMP snooping querier, complete the following tasks:
•
Enable IGMP snooping for the VLAN.
•
Determine the IGMP general query interval.
•
Determine the maximum response time for IGMP general queries.
Enabling the IGMP snooping querier
This feature enables the switch to periodically send IGMP general queries to establish and maintain
multicast forwarding entries at the data link Layer. You can configure an IGMP snooping querier on a
network without Layer 3 multicast devices.
Do not enable the IGMP snooping querier on 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
if it sends IGMP general queries with a low source IP address.
To enable the IGMP snooping querier for a VLAN:
Step
Enter system view.
1.
Enter VLAN view.
2.
Enable the IGMP snooping
3.
querier.
Command
system-view
interface interface-type
interface-number
igmp-snooping
router-port-deny [ vlan vlan-list ]
Command
system-view
vlan vlan-id
igmp-snooping querier
22
Remarks
N/A
N/A
By default, a port can become a
dynamic router port.
This configuration does not affect
the static router port
configuration.
Remarks
N/A
N/A
By default, the IGMP snooping
querier is disabled.