Wildcard mask question

[imran.moulvi]

Hi,

Does anyone know what a wild card mask 0.223.255.255 mean and has anyone used it?

Thanks,

Imran.

[George Horton]

That would allow the last three octets of an IP to be anything.

For instance 10.0.0.0 with inverse mask 0.255.255.255 matches 10.0.0.0 through to 10.255.255.255

Sent from Cisco Technical Support iPhone App

[stephen.stack]

Hey,

If it is,  0.223.255.255 that you mean then see a very good blog entry here from internetworkexpert on 'ACL summarization'

http://blog.ine.com/2010/11/25/performing-access-list-computation-route-summarization-acl-manager/#more-4247

The .223 will match a specific list of set of subnets based on the second octet. This is useful, I've never used this in production, only in Labs.

HTH

Regards

Stephen