ip subnet-zero Cisco 3945

[TheZman78]

I am trying to configure a Cisco 3945. When enter the command:

ip subnet-zero

and the do a

sh run

The running config does not show that subnet-zero is active. I even tried

sh run | inc subnet

and still see nothing. Why is the command not taking? I just want to configure the router with 2 IP addresses and a gateway of last resort.

Example:

Gige 0/0

ip address 192.168.1.1 255.255.255.252

duplex full

speed 1000

Gige 0/1

ip address 10.1.1.1 255.255.255.224

duplex auto

speed auto

For some reason when I configure Gige 0/1 it tells me that /27 is not allowed even though I set

ip classless

Can anyone please assist? Thanks!

[Edison Ortiz · Accepted solution]

ip subnet-zero in enabled by default.

http://www.cisco.com/en/US/docs/ios/ipaddr/command/reference/iad_ip.html#wp1013596

Can you provide the exact error during the configuration along with the entire config?

Thanks

[TheZman78]

oh man.. rookie mistake.. I was accidentally using the subnet IP for the gi 0/1

>.<

Oops! guess thats what happens when you make your configuration checklist at 3am

Thanks for the help!