unknown-unicast limit

Configures the maximum number of unknown unicast packets allowed per second and enables Syslog logging of unknown unicast packets.

Syntax

unknown-unicast limit num

unknown-unicast limit num kbps log

unknown-unicast limit num kbps threshold num action port-shutdown num

no unknown-unicast limit num

no unknown-unicast limit num kbps log

no unknown-unicast limit num kbps threshold num action port-shutdown num

Command Default

Unknown unicast rate limiting is disabled.

Parameters

num: Specifies the maximum number of unknown unicast packets per second. Valid values range from 1 through 8388607.
kbps: Enables byte-based limiting. The value can be 1 to Max Port Speed.
log: Enables Syslog logging of unknown unicast packets when the unknown unicast limit exceeds num kpbs .
threshold num: Specifies the packet drop count threshold value. Valid values range from 1 through 1048576.
action: Specifies further action must be taken.
port-shutdown: Specifies that port shutdown is the action taken.

Modes

Interface configuration mode

Usage Guidelines

Use 0 or the no form of the command to disable limiting.

Examples

The following example enables a unknown unicast limit of 131072 kbps.

device(config)# interface ethernet 9/1/1
device(config-if-e1000-9/1/1)# unknown-unicast limit 131072 kbps

The following example enables unknown unicast logging when the configured limit exceeds 100 Kbps.

device(config)# interface ethernet 1/2/1
device(config-if-e1000-1/2/1)# unknown-unicast limit 100 kbps log

History

Release version	Command history
08.0.10	The command was introduced.
08.0.40a	The command was modified to include the log keyword.