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dhcp scope of ip address configuration

Hi,

I would like to know the following,

We are having the data vlan and the voice vlan each with its own scope of ip addresses via using multi-vlan access port with the data vlan has the native vlan.

Now, for a certain reason the data vlan and ip addresses have to change and update on the dhcp server.

If the vlan and the ip range of the data have to change and update on the dhcp scope, must I prepare another new set of vlan and ip range for the voice and update on the dhcp server?

Thanks

1 REPLY
Cisco Employee

dhcp scope of ip address configuration

One thing you can do is create a secondary IP address on the router for the new subnet and apply it on the Data VLAN interface on your router.  Then kill off your old DHCP scopde for your data vlan subnet and create a new one to fall into the new subnet.

This will allow your clients that request a new IP address to use the secondary IP address on the router as their default gateway, and existing clients that still have an old IP address to use the existing IP address as their gateway.

Once the client's lease is up they will request a new IP address and get one from the new scope.  This way you don't need to change the data vlan at all.  At some point you would want to get rid of the old IP address on the router and move the secondary IP address to being the primary IP address.

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