On Wed, Sep 21, 2011 at 10:40:42AM -0700, Bill Prince wrote: > > We are running short on IP addresses, and I wonder if there is a way to > do this without splitting a subnet and losing the overhead IPs for a subnet. > > I have a remote tower serving a handful of subscribers, and am using an > RB450 to NAT them through a single IP. > > We are now hooking up a new sub that requires a dedicated, non-NATed > IP. Is there a way to pass through an additional IP without burning a > small subnet? > > Say the RB450 is NATing most of the subs through 1.2.3.122 > > And I want to put the dedicated sub on 1.2.3.124 (or something). > > How do I handle the fact that the gateway for both for 1.2.3.124 is not > on the same subnet?
One option: Give client an IP in an RFC1918 space, say 10.1.1.3 from 10.1.1.0/29 Say your router is using 10.1.1.1/29 on the interface speaking to the client. /ip route add dst-address=1.2.3.124/32 gateway=10.1.1.3 Client configures both 10.1.1.3/29 and 1.2.3.124/32 on their equipment and uses 10.1.1.1 as their default gateway. Then document somewhere in great big letters dripping with blood that you have stolen that IP from its expected subnet. Otherwise you will shoot yourself in the foot a year later when you forget about all of this. Depending on their hardware, they may or may not be able to configure their Wal-Mart router to support such a configuration. -- Scott Lambert KC5MLE Unix SysAdmin [email protected] _______________________________________________ Mikrotik mailing list [email protected] http://www.butchevans.com/mailman/listinfo/mikrotik Visit http://blog.butchevans.com/ for tutorials related to Mikrotik RouterOS
