Configuration Prerequisites - HP FlexNetwork 7500 Series Configuration Manual

Configuration prerequisites

Before you configure parameters for IGMP messages, complete the following tasks:
•
Enable IGMP snooping for the VLAN.
•
Determine the source IP address of IGMP general queries.
•
Determine the source IP address of IGMP group-specific queries.
•
Determine the source IP address of IGMP reports.
•
Determine the source IP address of IGMP leave messages.
•
Determine the 802.1p priority of IGMP messages
Configuring source IP addresses for IGMP messages
The IGMP snooping querier might send IGMP general queries with the source IP address 0.0.0.0.
The port that receives such queries will not be maintained as a dynamic router port. This might
prevent the associated dynamic IGMP snooping forwarding entry from being correctly created at the
data link layer and eventually cause multicast traffic forwarding failures.
To avoid this problem, you can configure a non-all-zero IP address as the source IP address of the
IGMP queries on the IGMP snooping querier. This configuration might affect the IGMP querier
election within the subnet.
You can also change the source IP address of IGMP reports or leave messages sent by a simulated
member host.
To configure source IP addresses for IGMP messages in a VLAN:
Step
Enter system view.
1.
Enter VLAN view.
2.
Configure the source IP
3.
address for IGMP general
queries.
Configure the source IP
4.
address for IGMP
group-specific queries.
Configure the source IP
5.
address for IGMP reports.
Command
system-view
vlan vlan-id
igmp-snooping
general-query source-ip
ip-address
igmp-snooping
special-query source-ip
ip-address
igmp-snooping report
source-ip ip-address
24
Remarks
N/A
N/A
By default, the source IP address of
IGMP general queries is the IP
address of the current VLAN
interface. If the current VLAN
interface does not have an IP
address, the source IP address is
0.0.0.0.
By default, the source IP address of
IGMP group-specific queries is one of
the following:
•
The source address of IGMP
group-specific queries if the
IGMP snooping querier has
received IGMP general queries.
•
The IP address of the current
VLAN interface if the IGMP
snooping querier does not
receive an IGMP general query.
•
0.0.0.0 if the IGMP snooping
querier does not receive an
IGMP general query and the
current VLAN interface does not
have an IP address.
By default, the source IP address of
IGMP reports is the IP address of the
current VLAN interface. If the current