October 2002
Intermediate to advanced
560 pages
12h 13m
English
Content preview from Cisco® Field Manual: Catalyst® Switch ConfigurationBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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11-3. Port Security
Port security enables you to configure a port to only allow a given device or devices access to the switch port.
Port security defines the allowed devices by MAC address.
MAC addresses for allowed devices can be manually configured and/or “learned” by the switch.
There are limits to how many MAC addresses can be secured on a port. These numbers vary between platforms.
When an unauthorized MAC attempts to access the port, the switch can suspend or disable the port.
Port security cannot be configured on a trunk port, a Switched Port Analyzer (SPAN) port, or a port that is dynamically assigned to a VLAN.
Port security is supported on the 5000, 4000, and 6000 switches running COS. It is supported on the 3500XL, 3550, and 2950 switches ...
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