HP A5500 SI Switch Series User Manual

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Enabling IGMP proxying
You can enable IGMP proxying on the interface in the direction toward the root of the multicast
forwarding tree to make the device serve as an IGMP proxy.
Follow these steps to enable IGMP proxying:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view interface interface-type interface-number —
Enable the IGMP proxying
feature
igmp proxying enable
Required
Disabled by default.
NOTE:
Each device can have only one interface serving as the proxy interface. In scenarios with multiple
instances, IGMP proxying is configured on only one interface per instance.
Do not enable IGMP on an interface with IGMP proxying enabled. Moreover, only the igmp require-
router-alert, igmp send-router-alert, and igmp version commands can take effect on such an
interface.
Do not enable other multicast routing protocols—such as PIM-DM or PIM-SM—on an interface with
IGMP proxying enabled, or vice versa. However, the source-lifetime, source-policy, and ssm-policy
commands configured in PIM view can still take effect. In addition, in IGMPv1, the designated router
(DR) is elected by the working multicast routing protocol—such as PIM—to serve as the IGMP querier.
A downstream interface that is runnin
g
IGMPv1 cannot be elected as the DR and cannot serve as the
IGMP querier.
Do not enable IGMP proxying on a VLAN interface with IGMP snooping enabled, or vice versa.
Configuring multicast forwarding on a downstream interface
Only queriers can forward multicast traffic; non-queriers have no multicast forwarding capabilities. This
design helps avoid duplicate multicast flows. It is the same on IGMP proxy devices. Only the
downstream interfaces that act as a querier can forward multicast traffic to downstream hosts.
However, when a downstream interface of a proxy device fails to win the querier election, you must
enable multicast forwarding on this interface.
Follow these steps to enable multicast forwarding on a downstream interface
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type interface-
number
—
Enable multicast forwarding on a
non-querier downstream interface
igmp proxying forwarding
Required
Disabled by default.

HP A5500 SI Switch Series Specifications

General

Layer Support	Layer 2 and Layer 3
MAC Address Table	16K entries
Routing Protocol	RIP, OSPF, BGP, IS-IS
Management	Web, CLI, SNMP
Input Voltage	100-240 V AC
Operating Temperature	0°C to 45°C
Ports	48 x 10/100/1000 ports, 4 x 10-Gigabit SFP+ ports
Dimensions	440 x 430 x 44 mm
Weight	5.5 kg
Operating Humidity	10% to 95% (non-condensing)