Acessing 512 ips on class C network

April 8, 2010 at 15:39:02
Specs: Windows 7
I would like to be able to do the following on a windows 7 system with ip 192.168.1.115:
Access local LAN 192.168.1.1-254
Access local LAN 192.168.2.1-254
I have tried using 255.255.254.0 and 0.0 as net masks but I still am not able to ping across the subnets. If I change the pc to 2.115 I can access the 2.* network but loose the 1.* network.

Should I be able to access the 192.168.1.1-2.254 range with a mask of 255.255.254.0 in windows 7 or is there a restriction using the the 192 range because it is a class C.

Sorry, but going round in circles with this one so any help appreciated as I am obviously not understanding something

Cheers
Andy


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#1
April 8, 2010 at 16:28:04
try using 192.168.0.0 - 192.168.1.255 with subnet mask 255.255.254.0
or
192.168.2.0 - 192.168.3.255

this is called supernetting and you only get 510 hosts not 512


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#2
April 8, 2010 at 16:31:44
If you're using 255.255.254.0, the net starts at:
192.168.0.0
and ends at:
192168.1.255

The next starts at:
192.168.2.0
and ends at:
192.168.3.255

And so on...
So simply use subnet mask of 255.255.252.0.


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#3
April 8, 2010 at 17:11:06
changing to x.x.252.0 results in a range
192.168.0.0 - 192.168.3.255
but I don't think that is what you are saying paulsep [since that would result in like 1024 ips]

*corrected mistyped subnet ip.


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Related Solutions

#4
April 8, 2010 at 17:52:36
Wanderer
Changing to 252 in the 3rd octet results in
192.168.0.0 to 192.168.3.255
That's what I wrote.

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#5
April 8, 2010 at 18:36:46
Thanks guys. I have tried 252 but get the same result. Could it be a windows red hearing?

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#6
April 8, 2010 at 18:41:01
um that should be red herring :)

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#7
April 8, 2010 at 18:44:33
If the rest of the PCs do have 255.255.255.0, they can't answer to your network.
E.g.:
A PC with 192.168.1.x / 255.255.252.0 can access the network 192.168.2.x.
A PC with 192.168.2.x /255.255.255.0 can't access 192.168.1.x because of the subnet mask.

So you also have to change the subnet mask at those PCs to 255.255.252.0.


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#8
April 8, 2010 at 18:51:27
Of course, silly me, thanks heaps for the quick help guys. That did it.

Cheers
Andy


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#9
April 8, 2010 at 19:35:40
You're welcome.

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