Configuring Source Ip Addresses For Igmp Messages; Setting The 802.1P Priority For Igmp Messages - HP FlexFabric 5700 Series Configuration Manual

Configuring source IP addresses for IGMP messages

A Layer 2 device does not enlist the port that receives an IGMP query whose source IP address is 0.0.0.0
on a port as a dynamic router port. This might prevent multicast forwarding entries 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 IGMP
queries sent by 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
1. Enter system view.
2. Enter VLAN view.
3. Configure the source IP
address for IGMP
general queries.
4. Configure the source IP
address for IGMP
group-specific queries.
5. Configure the source IP
address of IGMP reports.
6. Configure the source IP
address of IGMP leave
messages.

Setting the 802.1p priority for IGMP messages

When congestion occurs on outgoing ports of the Layer 2 device, it forwards IGMP messages in their
802.1p priority order, from highest to lowest. You can assign a higher 802.1p priority to IGMP messages
that are created or forwarded by the device.
You can set the 802.1p priority for IGMP messages for all VLANs in IGMP-snooping view or for the
current VLAN in VLAN view. The configuration made in VLAN view takes priority over the configuration
made in IGMP-snooping view.
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
igmp-snooping leave source-ip
ip-address
26
Remarks
N/A
N/A
The default setting 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, if the IGMP snooping querier
has received IGMP queries, the source IP
address of IGMP group-specific queries is
the source IP address of IGMP queries.
Otherwise, it is the IP address of the current
VLAN interface. If the VLAN interface does
not have an IP address, the source IP
address is 0.0.0.0.
The default setting 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.
The default setting 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.