Configuring Simulated Joining - HP A6600 Configuration Manual

To do...
4. Configure the port or ports as
static router port or ports.
A static (S, G) joining can take effect only if a valid multicast source address is specified and IGMP
snooping version 3 is currently running.
A static member port does not respond to queries from the IGMP querier; when you configure a port as a
static member port or cancel this configuration on the port, the port does not send an unsolicited IGMP
report or an IGMP leave message.
On an a switch that supports both IGMP snooping and IGMP, if IGMP is enabled on the virtual interface
of a VLAN and you want a port in that VLAN to be a static multicast group or source-group member port,
in addition to configuring the port as a static member port, you need to use igmp static-group to configure
the VLAN interface to be a static member of the multicast group or source and group. For more
information about igmp static-group, see IP Multicast Command Reference.
Static member ports and static router ports never age out. To remove such a port, you need to use the
corresponding undo command.

Configuring simulated joining

Generally, a host running IGMP responds to IGMP queries from the IGMP querier. If a host fails to
respond due to some reasons, the multicast router might deem that no member of this multicast group
exists on the network segment, and therefore will remove the corresponding forwarding path.
To avoid this situation from happening, you can enable simulated joining on a port of the router. Namely,
you can configure the port as a simulated member host for a multicast group. When receiving an IGMP
query, the simulated host gives a response. Thus, the router can continue receiving multicast data.
A simulated host acts like a real host, as follows:
When a port is configured as a simulated member host, the router sends an unsolicited IGMP report
•
through that port.
After a port is configured as a simulated member host, the router responds to IGMP general queries
•
by sending IGMP reports through that port.
• When the simulated joining function is disabled on a port, the router sends an IGMP leave message
through that port.
To do...
1. Enter system view.
2. Enter Ethernet interface/Layer
2 aggregate interface view or
port group view.
3. Configure simulated (*, G) or
(S, G) joining.
Each simulated host is equivalent to an independent host. For example, when receiving an IGMP query,
the simulated host corresponding to each configuration responds respectively.
Unlike a static member port, a port configured as a simulated member host will age out like a dynamic
member port.
Use the command...
igmp-snooping static-router-port
vlan vlan-id
Use the command...
system-view
interface interface-type interface-number
port-group manual port-group-name
igmp-snooping host-join group-address
[ source-ip source-address ] vlan vlan-id
21
Remarks
Required.
No static router ports by default.
Remarks
—
Required.
Use either approach.
Required.
Disabled by default.