what is badmask?

I tried to reconfigure the serial interface with /30 mask which was configured with /8 mask previously.it is not letting it.
how to go about doing this?
command:ip address 10.0.0.2 255.255.255.252
I got at the console as
Bad mask /30 for address 10.0.0.2[/b]

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wildfire

command:ip address 10.0.0.2 255.255.255.252
I got at the console as
Bad mask /30 for address 10.0.0.2

have you used the ip classless command?

: [/quote]

tunerX

2511_1(config)#no ip classless
2511_1(config)#int serial 1
2511_1(config-if)#ip address 10.0.0.2 255.255.255.252

2511_1(config-if)#no ip subnet-zero
2511_1(config)#int serial 1
2511_1(config-if)#ip address 10.0.0.2 255.255.255.252
Bad mask /30 for address 10.0.0.2

2511_1(config-if)#ip classless
2511_1(config)#int serial 1
2511_1(config-if)#ip address 10.0.0.2 255.255.255.252
Bad mask /30 for address 10.0.0.2

2511_1(config-if)#ip subnet-zero
2511_1(config)#int serial 1
2511_1(config-if)#ip address 10.0.0.2 255.255.255.252
2511_1(config-if)#

You need to configure "ip subnet-zero"

Are you running a 12.1 or earlier IOS?

sonagccna

thanks tunerX

i issued ip subnet-zero command it worked!

btw the ios is version 11.2

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