Planet XGS3-24042 User Manual download pdf (Page 150)

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16-5

1. Set the MAC address 00-01-11-11-11-11 of PC1 as a filter address.

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 7 and port 9, respectively.

Switch(config)#mac-address-table static 00-01-22-22-22-22 interface ethernet 1/0/7 vlan 1

Switch(config)#mac-address-table static 00-01-33-33-33-33 interface ethernet 1/0/9 vlan 1

16.4 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 for the switch portand contact technical support

for solution.

16.5 MAC Address Function Extension

16.5.1 MAC Address Binding

16.5.1.1 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 a MAC

address is 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, 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.

16.5.1.2 MAC Address Binding Configuration Task List

1. Enable MAC address binding function for the ports

2. Lock the MAC addresses for a port

3. MAC address binding property configuration

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