C
HAPTER
27
| Interface Commands
– 727 –
the speed/duplex mode under auto-negotiation, the required mode
must be specified in the capabilities list for an interface.
EXAMPLE
The following example configures port 5 to 100 Mbps, half-duplex
operation.
Console(config)#interface ethernet 1/5
Console(config-if)#speed-duplex 100half
Console(config-if)#no negotiation
Console(config-if)#
RELATED COMMANDS
negotiation (725)
capabilities (721)
switchport packet-
rate
This command configures broadcast, multicast and unknown unicast storm
control. Use the no form to restore the default setting.
SYNTAX
switchport {broadcast | multicast | unicast} packet-rate rate
no switchport {broadcast | multicast | unicast}
broadcast - Specifies storm control for broadcast traffic.
multicast - Specifies storm control for multicast traffic.
unicast - Specifies storm control for unknown unicast traffic.
rate - Threshold level as a rate; i.e., kilobits per second.
(Range: 64-100000 Kbps for Fast Ethernet ports,
64-1000000 Kbps for Gigabit Ethernet ports)
DEFAULT SETTING
Broadcast Storm Control: Enabled, packet-rate limit: 64 kbps
Multicast Storm Control: Disabled
Unknown Unicast Storm Control: Disabled
COMMAND MODE
Interface Configuration (Ethernet)
COMMAND USAGE
◆ When traffic exceeds the threshold specified for broadcast and
multicast or unknown unicast traffic, packets exceeding the threshold
are dropped until the rate falls back down beneath the threshold.
◆ Traffic storms can be controlled at the hardware level using this
command or at the software level using the auto-traffic-control
command. However, only one of these control types can be applied to a
port. Enabling hardware-level storm control on a port will disable
automatic storm control on that port.
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