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to pass through the switch at line speed.
Parameter: use dlf to limit unicast traffic for unknown destination; multicast to limit
multicast traffic; broadcast to limit broadcast traffic. <packets> stands for the number of
packets allowed to pass through per second for non-10Gb ports; for 10 Gb ports, this is
the number of packets allowed to pass through multiplies 1,040. The valid range for both
ports is 1 to 262,143.
Command mode: Interface Mode
Default: no limit is set by default, broadcast, multicast and unicast for unknown
destination are allowed to pass at line speed.
Usage Guide: All the ports in the switch belong to a same broadcast domain if no VLAN is
set. The switch will send the abovementioned three traffics to all the ports in the broadcast
domain, which may result in broadcast storm. Broadcast storm can greatly degrade the
switch performance, enabling broadcast storm control function can protect the switch from
broadcast storm to the best possibility. Note the difference of this command in 10 Gb ports
and other ports. If the allowed traffic is set to 3, it means to allow 3120 packets per second
and discard the rest for 10 Gb ports; while the same setting for non-10 Gb ports means to
allow 3 broadcast packets per second and discard the rest.
Example: Set port 8 – 10(1000Mb) of slot 2 to allow 3 broadcast packets per second.
Switch(Config)#interface ethernet 2/8-10
Switch(Config-Port-Range)#rate-suppression broadcast 3
3.2.1.2.10 shutdown
Command: shutdown
no shutdown
Function: Shut down the specified Ethernet port; the “no shutdown” command enables
the port.
Command mode: Interface Mode
Default: Ethernet port is enable by default.
Usage Guide: When Ethernet port is shut down, no data frames are sent in the port, and
the port status displayed when the user typed “show interfaces status” command is
“down”.
Example: Enable ports 1/1-8.
Switch(Config)#interface ethernet1/1-8
Switch(Config-Port-Range)#no shutdown
3.2.1.2.11 speed-duplex