bridging 172 networks ?

Jeremy Bessee jeremy.bessee at
Sat Aug 25 19:19:00 UTC 2007

Compustretch NewYork wrote:
> A certain host dhcp server (dhcp3d) has been serving up IPs in the 
> 172.16 range to an internal network.
> This server's upstream has now changed to, also, a 172.16 based network
> Thus one nic is given a address by the upstream server,
> the second nic is handing out leases in the 1.2 to 1.254 range.
> Does one of these networks need to switch to 192 or 10, or can they both 
> be on 172?
> If so, what is the best solution to preventing an IP conflict?
> Hoping this question is neither too simple nor too complicated but just 
> right!
> with TIA,
> Forest M.
> Compustretch at
If your subnet mask is such that the two networks do not conflict (i.e. or /24) then all is well, if your subnet mask is (/16) then yes, one will have to be modified.


Jeremy Bessee
Glendale Community College
Glendale, AZ

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