SNR S2989G-48TX-RPS — настройка MAC-таблицы и устранение неполадок в сети [159/553]

Превью страниц Страница 159 / 553

2-95

S2989G-24TX Operation Manual Chapter 2 Layer 2 services

Configuration

2.21.3

Typical Configuration Examples

Figure 2-33 MAC Table typical configuration example

Scenario:

Four PCs as shown in the above figure connect to port 1/0/5, 1/0/7, 1/0/9, 1/0/11 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 1/0/7 and port 1/0/9, 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 1/0/7 and port 1/0/9,

respectively.

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

ethernet 1/0/7

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

ethernet 1/0/9

2.21.4

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