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8.5 MAC Address Function Extension
8.5.1 MAC Address Binding
8.5.1.1 Introduction to MAC Address Binding
Most switches support MAC address learning, allowing each port to dynamically learn several
MAC addresses so that forwarding data streams between known MAC addresses within the ports
can be achieved. If a MAC address has aged, the packet destined for that entry will be broadcasted.
In other words, a MAC address learned in a port will be used for forwarding in that port, and if the
connection has been changed to another port, the switch will learn the MAC address again to
forward data in the new port.
However, in some cases, security or management policy may require MAC addresses to be
bound with the ports, only data streams from the bound MAC are allowed to be forwarded in the
ports. That is to say, after a MAC address is bound to a port, only the data streams destined for that
MAC address can flow in from the binding port, data stream destined for the other MAC addresses
that are not bound to the port will not be allowed to pass through the port.
8.5.1.2 MAC Address Binding Configuration
8.5.1.2.1 MAC Address Binding Configuration Task Sequence
1. Enable MAC address binding function for the ports
2. Lock the MAC addresses for a port
3.
MAC address binding property configuration
1.
Enable MAC address binding function for the ports
Command
Interface Mode
switchport port-security
no switchport port-security
EES4710BD 10 Slots L2/L3/L4 Chassis Switch
Explanation
Enables MAC address binding function for
the port: the "no switchport port-security"
command disables the MAC address binding
function for the port.
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