Fortinet MR1 - Manual (Page 91)

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Interface Config
This command enables GMRP Multicast Registration Protocol on all interfaces. If an
interface which has GMRP enabled is enabled for routing or is enlisted as a member of a
port-channel (LAG), GMRP functionality will be disabled on that interface. GMRP
functionality will subsequently be re-enabled if routing is disabled and port-channel (LAG)
membership is removed from an interface that has GMRP enabled.
Syntax
switchport gmrp all
no switchport gmrp all
all - All interfaces.
no - This command disables GMRP Multicast Registration Protocol on a selected interface.
Default Setting
Disabled
Command Mode
Global Config
5.2.4.9 garp timer
This command sets the GVRP join time per port and per GARP. Join time is the interval
between the transmission of GARP Protocol Data Units (PDUs) registering (or re-registering)
membership for a VLAN or multicast group.
This command has an effect only when GVRP and GMRP are enabled. The time is from 10
to 100 (centiseconds).
Syntax
garp timer join <10-100>
no garp timer join
<10-100> - join time (Range: 10 – 100) in centiseconds.