really basic dumb question...

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LostGen · Post by **LostGen** » Tue Jun 28, 2005 11:16 am

I could probly wait and ask someone at work but I figure I will get a much quicker response from all of you.

When you see somthing like this: "192.168.1.0/24". Does this mean 192.168.1.0 through 192.168.1.24. Ive never had to use this method for specifying a subnet and am alittle confused. I am guessing this is what it means but could be completely off. So on this same logic if I wanted to specify in a ACL or somthing an entire subnet it would be 192.168.1.0/255? correct?

Sorry and thanks for the help,

LG

chratnox · Post by **chratnox** » Tue Jun 28, 2005 11:28 am

No, /24 means there are 24 bits in use for the network. So, seeing as you have /32 with ipv4 you have 8 bits left to use for host addresses (2 ^8). So you'll have 256 addresses to use for the network. However, 2 addresses are unusable (.0 (network), .255 (broadcast)), so you can use 254 address for the network.

If you want to specify a complete subnet in an ACL which has a /24 you'll have 192.168.1.0/24 (thus, 192.168.1.0 till 192.168.1.255).

LostGen · Post by **LostGen** » Tue Jun 28, 2005 11:35 am

Wild, and I wasnt even close!

Thanks for clarifing that.

LG

tomk · Post by **tomk** » Tue Jun 28, 2005 1:39 pm

Moved from Documentation, Tips & Tricks, please don't post support questions there.