Grrrr… stupid math…

Jay Killion, CCIE #17873 R/S


From: Jeff Rensink <[email protected]<mailto:[email protected]>>
Date: Sunday, December 29, 2013 3:09 PM
To: Jay Killion <[email protected]<mailto:[email protected]>>
Cc: 
"[email protected]<mailto:[email protected]>" 
<[email protected]<mailto:[email protected]>>
Subject: Re: [OSL | CCIE_Wireless] WB1 Lab 2.3

.223 - .254 does equal 32 addresses

.223 - .232 = 10 addresses
.233 - .242 = 10 addresses
.243 - .252 = 10 addresses
.253 - .254 = 2 addresses




Regards,



Jeff Rensink : Sr Instructor : iPexpert<http://www.ipexpert.com/>

CCIE # 24834 :: Wireless / R&S

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On Sun, Dec 29, 2013 at 2:47 PM, Jay Killion (jakillio) 
<[email protected]<mailto:[email protected]>> wrote:
Quick question…

Requirement is - "For all IPv4 DHCP scopes, use the upper 32 device addresses 
of the subnet."

The solution excludes 10.10.x.1 – 10.10.x.222, but shouldn't the correct 
exclusion actually be to .221?  If it ends at .222 then the usable addresses 
are .223 - .254, which equals 31 device addresses.

Thanks -

Jay Killion, CCIE #17873 R/S

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