[c-nsp] Subnetting problem

[Jerry Bacon]

On 10/6/2011 12:22 PM, Joseph Mays wrote:
> It feels strange to be asking a question about something as simple as a subnet here, but I'm honestly not sure what's going on in this case. Probably something simple.
>
> As you can see from the following set of commands, the router is fine with breaking the following addresses up into /30's, but not fine with the aggregate of the two routes into a /29.
>
> gw1.armplc(config)#ip route 216.24.2.4 255.255.255.252 216.24.0.54
> gw1.armplc(config)#no ip route 216.24.2.4 255.255.255.252 216.24.0.54
> gw1.armplc(config)#ip route 216.24.2.8 255.255.255.252 216.24.0.54
> gw1.armplc(config)#no ip route 216.24.2.8 255.255.255.252 216.24.0.54
> gw1.armplc(config)#ip route 216.24.2.4 255.255.255.248 216.24.0.54
> %Inconsistent address and mask

A /29 (.248) has to start on a multiple of 8, so x.x.x.4 255.255.255.248 
won't work.

-- 
Jerry Bacon
Senior Network Engineer