[c-nsp] Subnetting problem

[Josh Atterbury]

you can't aggregate those two /30 into a single /29. /29 subnets are increments of 8 eg 216.24.2.0/29, 216.24.2.8/29. Write it out in binary and look at the most significant bits in each.

Sent from my iPad

On 07/10/2011, at 6:22 AM, "Joseph Mays" <mays at win.net> 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
> 
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