SGS-6341-Series User Manual

21-110
Switch(config)#mac-address-table static 00-01-11-11-11-11 discard vlan 1.
2.Set the static mapping relationship for PC2 and PC3 to port 1/7 and port 1/9, respectively.
Switch(config)#mac-address-table static address 00-01-22-22-22-22 vlan 1 interface
ethernet 1/7
Switch(config)#mac-address-table static address 00-01-33-33-33-33 vlan 1 interface
ethernet 1/9
21.4 MAC Table Troubleshooting
Using the show mac-address-table command, a port is found to be failed to learn the MAC of a
device connected to it. Possible reasons:
 The connected cable is broken.
 Spanning Tree is enabled and the port is in “discarding” status; or the device is just
connected to the port and Spanning Tree is still under calculation, wait until the
Spanning Tree calculation finishes, and the port will learn the MAC address.
 If not the problems mentioned above, please check the switch port and contact
technical support for solution.
21.5 MAC Address Function Extension
21.5.1 MAC Address Binding
21.5.1.1 Introduction to MAC Address Binding
Most switches support MAC address learning; each port can dynamically learn several MAC
addresses, so that forwarding data streams between known MAC addresses within the ports
can be achieved. If an MAC address is aged, the packet destined for that entry will be
broadcasted. In other words, an MAC address learned in a port will be used for forwarding in
that port, if the connection is 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 stream from the binding 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 stream destined
for that MAC address can flow in from the binding port, data stream destined for the other MAC
addresses that not bound to the port will not be allowed to pass through the port.
User’s Manual of SGS-6341 series