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Table of Contents

Devices Managed by FortiOS

Configuring IGMP-snooping settings

You need to configure global IGMP-snooping settings and then configure IGMP-snooping settings on a FortiSwitch unit.

Note

You cannot use IGMP snooping when network access control (NAC) has been enabled on a global scale with set mode global under the config switch-controller nac-settings command.

This section covers the following topics:

Configuring global IGMP-snooping settings

Use the following commands to configure the global IGMP-snooping settings.

Aging time is the maximum number of seconds that the system will retain a multicast snooping entry. Enter an integer value from 15 to 3600. The default value is 300.

The flood-unknown-multicast setting controls whether the system will flood unknown multicast messages within the VLAN.

config switch-controller igmp-snooping

set aging-time <15-3600>

set flood-unknown-multicast {enable | disable}

end

Configuring IGMP-snooping settings on a switch

IGMP snooping allows the FortiSwitch to passively listen to the Internet Group Management Protocol (IGMP) network traffic between hosts and routers. The switch uses this information to determine which ports are interested in receiving each multicast feed. FortiSwitch can reduce unnecessary multicast traffic on the LAN by pruning multicast traffic from links that do not contain a multicast listener.

NOTE: When an inter-switch link (ISL) is formed automatically in FortiLink mode, the igmps-flood-reports and igmps-flood-traffic options are disabled by default.

Use the following commands to configure IGMP settings on a FortiSwitch port:

config switch-controller managed-switch

edit <FortiSwitch_serial_number>

config ports

edit <port_name>

set igmps-flood-reports {enable | disable}

set igmps-flood-traffic {enable | disable}

end

end

For example:

config switch-controller managed-switch

edit S524DF4K15000024

config ports

edit port3

set igmps-flood-reports enable

set igmps-flood-traffic enable

end

end

Configuring IGMP-snooping settings

You need to configure global IGMP-snooping settings and then configure IGMP-snooping settings on a FortiSwitch unit.

Note

You cannot use IGMP snooping when network access control (NAC) has been enabled on a global scale with set mode global under the config switch-controller nac-settings command.

This section covers the following topics:

Configuring global IGMP-snooping settings

Use the following commands to configure the global IGMP-snooping settings.

Aging time is the maximum number of seconds that the system will retain a multicast snooping entry. Enter an integer value from 15 to 3600. The default value is 300.

The flood-unknown-multicast setting controls whether the system will flood unknown multicast messages within the VLAN.

config switch-controller igmp-snooping

set aging-time <15-3600>

set flood-unknown-multicast {enable | disable}

end

Configuring IGMP-snooping settings on a switch

IGMP snooping allows the FortiSwitch to passively listen to the Internet Group Management Protocol (IGMP) network traffic between hosts and routers. The switch uses this information to determine which ports are interested in receiving each multicast feed. FortiSwitch can reduce unnecessary multicast traffic on the LAN by pruning multicast traffic from links that do not contain a multicast listener.

NOTE: When an inter-switch link (ISL) is formed automatically in FortiLink mode, the igmps-flood-reports and igmps-flood-traffic options are disabled by default.

Use the following commands to configure IGMP settings on a FortiSwitch port:

config switch-controller managed-switch

edit <FortiSwitch_serial_number>

config ports

edit <port_name>

set igmps-flood-reports {enable | disable}

set igmps-flood-traffic {enable | disable}

end

end

For example:

config switch-controller managed-switch

edit S524DF4K15000024

config ports

edit port3

set igmps-flood-reports enable

set igmps-flood-traffic enable

end

end