Edge-Core ECS4110-28T, Management Manual, Page: 1057 / 1514

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HAPTER
31
| Congestion Control Commands
Storm Control Commands
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S
TORM
C
ONTROL
C
OMMANDS
Storm control commands can be used to configure broadcast, multicast,
and unknown unicast storm control thresholds. Traffic storms may occur
when a device on your network is malfunctioning, or if application
programs are not well designed or properly configured. If there is too much
traffic on your network, performance can be severely degraded or
everything can come to complete halt.
You can protect your network from traffic storms by setting a threshold for
broadcast, multicast or unknown unicast traffic. Any packets exceeding the
specified threshold will then be dropped.
switchport
packet-rate
This command configures broadcast, multicast and unknown unicast storm
control. Use the no form to restore the default setting.
S
YNTAX
switchport { broadcast | multicast | unknown-unicast }
packet-rate rate
no switchport { broadcast | multicast | unknown-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. (Range: 500-1488100 pps)
D
EFAULT
S
ETTING
Broadcast Storm Control: Enabled, 500 pbps
Multicast Storm Control: Disabled
Unknown Unicast Storm Control: Disabled
C
OMMAND
M
ODE
Interface Configuration (Ethernet, Port Channel)
C
OMMAND
U
SAGE
◆
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.
Table 130: Rate Limit Commands
Command Function Mode
switchport
packet-rate *
* Enabling hardware-level storm control with this command on a port will disable
software-level automatic storm control on the same port if configured by the auto-
traffic-control command.
Configures broadcast, multicast, and unknown
unicast storm control thresholds
IC
show interfaces
switchport
Displays the administrative and operational
status of an interface
NE, PE