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DES-7200 Configuration Guide Chapter 9 Share VLAN Configuration
9-2
The VID of the packets from PC1 to the server is 2. The switch will learn PC1’s
address, as shown in Table 1.
Table 1
VLAN MAC Address Type Interface
2 PC1-MAC DYNAMIC Port 1
Assume that all the response packets of the server belong VLAN 10. Since the
switch learns PC1’s MAC address with VID 2, it will broadcast the response
packets whose VID is 10 upon their arrival. Consequently, PC2 will receive the
packets that the server sends to PC1, which are unuseful. This wastes
bandwidth and PC2’s resource. How to avoid this problem? Administrator can
set VLAN 10 to be a Share VLAN, so that the switch will replicate the MAC
address to VLAN 10 when it learns the MAC address with VID 2.
Table 2