DHCP Scopes

[Andyleates]

Hi

I am trying to add an additional DHCP scope to one of our servers, but am getting an overlap error.

Exisiting range
172.21.51.1/16 through 172.21.51.254/16
Want to add
172.21.52.1/16 through 172.21.52.254/16

I understand this is overlapping bacause of the same subnet.

What I actually want to do here is load balance my users over two circuits to the same distination, giving one scope a different default gateway to the other scope.

Is this possible in any way?

Many thanks

Andy

 

[TheMisio]

Andy,

I don't think you can do that on the same server. Splitting scopes would work on two seperate server. But remember to set up exclusions.

Regards,

Michael

 

[Rockstar101]

Actually its the 80/20 rule. Use two DHCP servers and configure them to use the 80/20 rule to do what your trying to do for load balancing.

 

[GrimR]

I think I'm correct in saying that those IP ranges should be 172.21.48.1-172.21.51.254 and 172.21.52.1-172.21.55.254. subnet mask of 255.255.252.0 standard. If you using CIDR which I think you are then there is only 1 subnet that being 172.21.0.0 - 172.21.255.255. which you point out in your post, with a subnet mask 255.255.0.0.
So you will need to do as Rockstar101 & TheMisio suggest.
BTW can you have two default gateways using the same IP range. Can't remember, it's the kids making me old.