Igmp Filtering; Static Multicast Router; Igmp Snooping Configuration Example - HP GbE2c - Blc Layer 2/3 Fiber SFP Option Application Manual

IGMP Filtering

With IGMP Filtering, you can allow or deny a port to send and receive multicast traffic to certain multicast groups.
Unauthorized users are restricted from streaming multicast traffic across the network.
If access to a multicast group is denied, IGMP Membership Reports from the port for that group are dropped, and the
port is not allowed to receive IP multicast traffic from that group. If access to the multicast group is allowed,
Membership Reports from the port are forwarded for normal processing.
To configure IGMP Filtering, you must globally enable IGMP Filtering, define an IGMP Filter, assign the filter to a
port, and enable IGMP Filtering on the port. To define an IGMP Filter, you must configure a range of IP multicast
groups, choose whether the filter will allow or deny multicast traffic for groups within the range, and enable the filter.
NOTE: Low-numbered filters take precedence over high-number filters. For example, the action defined for
IGMP Filter 1 supersedes the action defined for IGMP Filter 2.
Configuring the range
Each IGMP Filter allows you to set a start and end point that defines the range of IP addresses upon which the filter
takes action. Each IP address in the range must be between 224.0.0.0 and 239.255.255.255.
Configuring the action
Each IGMP Filter can allow or deny IP multicasts to the range of IP addresses configured. If you configure the filter to
deny IP multicasts, then IGMP Membership Reports from multicast groups within the range are dropped.
You can configure a secondary filter to allow IP multicasts to a small range of addresses within a larger range that a
primary filter is configured to deny. The two filters work together to allow IP multicasts to a small subset of addresses
within the larger range of addresses. The secondary filter must have a lower number than the primary filter, so that it
takes precedence.

Static multicast router

A static multicast router (Mrouter) can be configured for a particular port on a particular VLAN. A static Mrouter does
not have to be learned through IGMP Snooping.
A total of eight static Mrouters can be configured on the switch. Only uplink (20-24) and interconnect ports (17-18)
can accept a static Mrouter. A port that belongs to a trunk group cannot accept a static Mrouter, only Mrouters
learned through IGMP Snooping.
When you configure a static Mrouter on a VLAN, it replaces any dynamic Mrouters learned through IGMP Snooping.

IGMP Snooping configuration example

This section provides steps to configure IGMP Snooping on the switch, using the Command Line Interface (CLI) or the
Browser-based Interface (BBI).
Configuring IGMP Snooping (CLI example)
1. Configure port and VLAN membership on the switch, as described in the "Configuring ports and VLANs (CLI
example)" section in the "VLANs" chapter.
2. Add VLANs to IGMP Snooping and enable the feature.
>> /cfg/l3/igmp/snoop
>> IGMP Snoop# ena
>> IGMP Snoop# apply
(Select IGMP Snooping menu)
(Enable IGMP Snooping)
(Make your changes active)
IGMP Snooping 98