How to solve this problem? A VLAN configured for each DHCP server, one is the easiest way, but you do so, the efficiency will be relatively low, so we do not adopt this approach. In fact, we can use the three switches relay agent function to implement the method, as is usually divided into three VLAN on the switch to operate, while the general three switches have DHCP relay agent function, so that the switch can be Each VLAN interfaces on the DHCP relay function is enabled, so that when the client VLAN issued in connection with the DHCP server's request, in the current VLAN can not be found, they will submit this information to the interface, and then by the Interface sub-issue DHCP server. By using this method, you can let the client and the DHCP server communicate with each other, as in between the client and DHCP server, set up a pontoon bridge, to send information between the two return to normal. Please join the following essays are a look at how to achieve the operation.
First, configure the switch
To achieve the above methods, you need to first configure the switch in three DHCP relay service. Since all brands are basically the same configuration of the switch, but the command format will be different, so the following operation may have access to your switch, but the other switch configurations. Here the author to PassPort8600 switch, for example, to tell you how to configure DHCP relay service layer switches.
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