192.168.2.0 / 255.255.255.254

  • Thread starter Thread starter JD
  • Start date Start date
J

JD

I have a network that I want to create that is 192.168.2.0 range with
255.255.255.254 mask - which creates a max address of 510 instead of 254 -

(1) Question - since I am doing this and will create one big subnet with
510 possible ip in the range, I do not have to worry about routing do I?
All in one big warehouse office.

(2) When I use 24 bit subnet (255.255.255.0) - it is 1 Supernet. When I
use 23 bit subnet (255.255.254.0) - it creates TWO SUPERNETS - What does
this supernet really indicate and how does it affect my plan of creating a
23 bit subnet mask?
 
I have a network that I want to create that is 192.168.2.0 range with
255.255.255.254 mask - which creates a max address of 510 instead of 254 -
Click to expand...

Did you misspell it?
Maybe you wanted to say 255.255.254.0?
(1) Question - since I am doing this and will create one big subnet with
510 possible ip in the range, I do not have to worry about routing do I?
All in one big warehouse office.
Click to expand...

As long as the mask is correctly configured on each computer, you shouldn't
have any problem.
(2) When I use 24 bit subnet (255.255.255.0) - it is 1 Supernet. When I
use 23 bit subnet (255.255.254.0) - it creates TWO SUPERNETS - What does
this supernet really indicate and how does it affect my plan of creating a
23 bit subnet mask?
Click to expand...

What are you meaning by "supernet"?

Massimo
 
Perhaps I'm a little rusty on my subnet mathematics, but that will
only create 2 usable addresses... humm... not what you're looking for.
Perhaps you got to FF (255) happy, and just ran over yourself... =)
try 255.255.254.0

Not sure about your 'supernet' term, who's nomenclature is that?

I have a network that I want to create that is 192.168.2.0 range with
255.255.255.254 mask - which creates a max address of 510 instead of 254 -

(1) Question - since I am doing this and will create one big subnet with
510 possible ip in the range, I do not have to worry about routing do I?
All in one big warehouse office.

(2) When I use 24 bit subnet (255.255.255.0) - it is 1 Supernet. When I
use 23 bit subnet (255.255.254.0) - it creates TWO SUPERNETS - What does
this supernet really indicate and how does it affect my plan of creating a
23 bit subnet mask?
Click to expand...

Jason Olson
Solutions Mgr
www.tj-myers.com
TJ-Myers Consulting Group
 
Sorry - yes I meant 255.255.254.0 - 23 bit subnet -

From what I gather, you guys are saying I can do this for all my machines to
have 510 available IP's - correct?


Thx again
 
I was using this tool by WildPackets (free) - subnet calculator and it had
that terms - IP Subnet Calculator.
 
A supernet is when you take bits from a higher class. In JD's case, he is
taking bits to super extend a class C.

A subnet is when you create a smaller division from a class.

Using 192.168.2.0 /23 means you are using 192.168.2.0 - 192.168.3.255

Normally both of these are Subnets by themselves. You have just aggregated
them into 1




As to the mask, everyone has already pointed out to use a /23 address
space. You may have a concern if you use programs that are broadcast
intensive, or all the clients reside on a hub / hubs ( as opposed to a
switch ). These concerns would be for performance. If either of the cases
are true, then you would consider moving to switches, and possibly add a
router and divide 2 Class C address spaces.
 
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