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17.3 Typical Configuration
Examples
MAC Table typical configuration example
Scenario:
Four PCs as shown in the above figure connect to port 1/5, 1/7, 1/9, 1/11 of switch, all the four
PCs belong to the default VLAN1. As required by the network environment, dynamic learning
is enabled. PC1 holds sensitive data and can not be accessed by any other PC that is in
another physical segment; PC2 and PC3 have static mapping set to port 7 and port 9,
respectively.
The configuration steps are listed below:
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 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
17.4 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:
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