Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

C2960_POE - bad mask /24 on Int VLAN1

Greetings,

(Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(44)SE6)

I'm attempting to configure the IP address on int VLAN1 to 192.168.3.0 255.255.255.0 and keep getting:

Bad mask /24 for address 192.168.3.0

I've even tried adding "ip subnet-zero" to the config. but it doesn't make any difference.

It will accept other addresses:  example:  172.18.1.1 255.255.255.0 works fine.

Thanks.

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Blue

Re: C2960_POE - bad mask /24 on Int VLAN1

iholdings wrote:

Greetings,

(Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(44)SE6)

I'm attempting to configure the IP address on int VLAN1 to 192.168.3.0 255.255.255.0 and keep getting:

Bad mask /24 for address 192.168.3.0

I've even tried adding "ip subnet-zero" to the config. but it doesn't make any difference.

It will accept other addresses:  example:  172.18.1.1 255.255.255.0 works fine.

Thanks.

192.168.3.0 is the network number. You can't use that. You can use 192.168.3.1 -> 192.168.3.254 with 192.168.3.255 being the broadcast address.

Jon

2 REPLIES
Hall of Fame Super Blue

Re: C2960_POE - bad mask /24 on Int VLAN1

iholdings wrote:

Greetings,

(Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(44)SE6)

I'm attempting to configure the IP address on int VLAN1 to 192.168.3.0 255.255.255.0 and keep getting:

Bad mask /24 for address 192.168.3.0

I've even tried adding "ip subnet-zero" to the config. but it doesn't make any difference.

It will accept other addresses:  example:  172.18.1.1 255.255.255.0 works fine.

Thanks.

192.168.3.0 is the network number. You can't use that. You can use 192.168.3.1 -> 192.168.3.254 with 192.168.3.255 being the broadcast address.

Jon

New Member

Re: C2960_POE - bad mask /24 on Int VLAN1

I believe I came to the same conclusion just as you

were typing your reply.

I can't even use the 'I'm a noob' as an excuse.

Thanks for your prompt reply.  All set.

1020
Views
0
Helpful
2
Replies