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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Cisco Systems RJ-45-to-AUX manual Configuring Bandwidth−Based Suppression, Configuring Packet−Based Suppression, 159