%Inconsistent address and mask

[David Draper]

All,

     I am in the process of expanding a subnet from a /24 to a /23 10.12.155.0 255.255.255.0 to 10.12.155.0 255.255.254.0 and I keep getting a %Inconsistent address and mask error when I do an IP Route (ip route 10.12.155.0 255.255.254.0 10.128.0.3).  I have expanded multiple subnets in the past for example 10.12.142.0 /24 to a /23 so I am not seeing why this is not working properly.  Thanks for any help that you can provide. 

     Dave

[John Blakley · Accepted solution]

David,

Your boundary starts at 154 for that mask, so you'll need to add the route as "ip route 10.12.154.0 255.255.254.0 10.128.0.3".

If you want just the 155 subnet, you can add it as a class c with "ip route 10.12.155.0 255.255.255.0 10.128.0.3" and that would work as well.

In your past example, your boundary would start at 142, so that's why you didn't have an issue then...

HTH,
John

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[David Draper]

John,

     Thanks for the reply, I just relaized it when I did the math. I appreciate it!

     Dave