Configuring Igmp Proxying - HP A8800 Configuration Manual

Step
3. Configure an IGMP SSM
mapping.

Configuring IGMP proxying

Before you configure the IGMP proxying feature, complete the following tasks:
Configure any unicast routing protocol so that all devices in the domain are interoperable at the
•
network layer.
• Enable IP multicast routing.
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.
Configuration guidelines
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.
You cannot 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.
You cannot 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 DR elected by the
working multicast routing protocol (such as PIM) serves as the IGMP querier. Therefore, a downstream
interface running IGMPv1 cannot be elected as the DR and thus cannot serve as the IGMP querier.
You cannot enable IGMP proxying on a VLAN interface with IGMP snooping enabled, or vice versa.
Configuration procedure
To enable IGMP proxying:
Step
1. Enter system view.
2. Enter interface view.
3. Enable the IGMP
proxying feature.
Configuring multicast forwarding on a downstream interface
Generally, only queriers can forward multicast traffic and non-queriers have no multicast forwarding
capabilities in order to avoid duplicate multicast flows. It is the same with IGMP proxy devices. Only the
downstream interfaces acting as a querier can forward multicast traffic to downstream hosts.
Command
ssm-mapping group-address { mask |
mask-length } source-address
Command
system-view
interface interface-type interface-number
igmp proxying enable
99
Remarks
No IGMP mappings are
configured by default.
Remarks
N/A
N/A
Disabled by default.