Security
Configuring Port Security
Cisco Small Business 200 Series Smart Switch Administration Guide 260
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STEP 1 Click Security > Storm Control.
All the fields on this page are described in the Edit Storm Control page except for the Storm Control Rate
Threshold (%). It displays the percent of the total available bandwidth for unknown Unicast, Multicast, and
Broadcast packets before storm control is applied at the port. The default value is 10% of the maximum rate
of the port and is set in the Edit Storm Control page.
STEP 2 Select a port and click Edit.
STEP 3 Enter the parameters.
• Interface—Select the port for which storm control is enabled.
• Storm Control—Select to enable Storm Control.
• Storm Control Rate Threshold—Enter the maximum rate at which unknown packets can be
forwarded. The default for this threshold is 10,000 for FE devices and 100,000 for GE devices.
• Storm Control Mode—Select one of the modes:
- Unknown Unicast, Multicast & Broadcast—Counts unknown Unicast, Broadcast, and Multicast
traffic towards the bandwidth threshold.
- Multicast & Broadcast—Counts Broadcast and Multicast traffic towards the bandwidth threshold.
- Broadcast Only—Counts only Broadcast traffic towards the bandwidth threshold.
STEP 4 Click Apply. Storm control is modified, and the Running Configuration file is
updated.
Configuring Port Security
Network security can be increased by limiting access on a port to users with specific MAC addresses. The
MAC addresses can be either dynamically learned or statically configured.
Port security monitors received and learned packets. Access to locked ports is limited to users with
specific MAC addresses.
Port Security has four modes:
• Classic Lock—All learned MAC addresses on the port are locked, and the port does not learn any
new MAC addresses. The learned addresses are not subject to aging or re-learning.
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