Configuring Bandwidth−Based Suppression; Configuring Packet−Based Suppression; Disabling Multicast Suppression - Cisco RJ-45-to-AUX Brochure

GMRP and GARP are interchangeable for the set and show commands. GMRP is considered an alias of
GARP.
Configuring Bandwidth−Based Suppression
Bandwidth−based suppression is a hardware−based suppression method. The threshold is set as a percentage
of the port's bandwidth. When the multicast/broadcast traffic exceeds the threshold within a one second
period, the switch stops forwarding multicast/broadcast traffic. Unicast traffic will still be forwarded. Use the
following command to configure bandwidth−based suppression:
Coriolis> (enable) set port broadcast 2/12 75%
Port(s) 2/12 broadcast traffic limited to 75%.
Configuring Packet−Based Suppression
Packet−based suppression is a software−based suppression method. The threshold is set as a number of
packets traveling through the port. When the multicast/broadcast traffic exceeds the threshold within a
one−second period, the switch stops all incoming traffic for the remainder of the period. Use the following
command to configure packet−based suppression:
Coriolis> (enable) set port broadcast 2/12 500
Port(s) 2/12 broadcast traffic limited to 500 packets/second.

Disabling Multicast Suppression

Use the following command to disable both bandwidth−based and packet−based suppression:
Coriolis> (enable) clear port broadcast 2/12
Port 2/12 broadcast traffic unlimited.
Tip Bandwidth−based suppression is preferable to packet−based suppression. Packet sizes vary, and it is
difficult to determine the right number of packets to specify for packet−based suppression. For example,
you could have 500 small broadcast packets that used only 10 percent of the bandwidth—but a
packet−based suppression value of 500 would still shut down the port.
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