Re: Reserved IP numbers

[MaD dUCK]

also sprach Holp, John Mr. (on Wed, 07 Mar 2001 08:21:25AM -0500):
> 127.16.x.x through 127.31.x.x

127/8 is loopback, the third range of networks in RFC1918 is

172.[16,31]/12

martin

[greetings from the heart of the sun]# echo madduck@ !#:1:[EMAIL 
PROTECTED]@@@.net
-- 
"and if the cloud bursts, thunder in your ear
 you shout and no one seems to hear
 and if the band you're in starts playing different tunes
 i'll see you on the dark side of the moon."
   -- pink floyd, 1972

Re: Reserved IP numbers

[Bob Brown]

On Wed, 07 Mar 2001, Holp, John Mr. wrote:
> I am getting mixed results from different sources about the subject of
> reserved internet addresses for internal subnets.
> 
> Most indicate that 10.x.x.x is for the category A network
> 
> and 192.168.0.0 though 192.168.255.255 for the C category
> 
> But the confusion is in the B category.
> 
127 is the local loopback
172.16.x.x would be the class B range.
You might want to look at the book; "Linux Network Administrator's Guide". 
It's the defacto begining and end for linux networking.
 -- 
Simon's rule of Auto Repair Shops
"Ask if there's a problem and there will be."

Re: Reserved IP numbers

[Robert Waldner]

On Wed, 07 Mar 2001 08:21:25 EST, "Holp, John Mr." writes:
>Some sources indicate it is;
>
>127.16.x.x through 127.31.x.x

This is just plain wrong.

>while others indicate it is;
>
>172.16.x.x Through 172.31.x.x

RFC1918 (the only *authoritative* source for private addressing)
 clearly defines 172.16/12 for this.

127/8 is for loopback et al.

cheers,
&rw
-- 
/  Ing. Robert Waldner  | Network Engineer | T: +43 1 89933  F: x533 \ 
\ <[EMAIL PROTECTED]> |KPNQwest/AT   |   DSA key ID: C33A2BC0  / 

Reserved IP numbers

[Holp, John Mr.]

I am getting mixed results from different sources about the subject of
reserved internet addresses for internal subnets.

Most indicate that 10.x.x.x is for the category A network

and 192.168.0.0 though 192.168.255.255 for the C category

But the confusion is in the B category.

Some sources indicate it is;

127.16.x.x through 127.31.x.x

while others indicate it is;

172.16.x.x Through 172.31.x.x

It looks like a transposition error between 127 versus 172

127.0.0.1 is what I use for the loop back test and normally 127 is reserved
and not to be used for normal addressing.  I don't think of the 127 range as
being in either A or B category, rather a special case.  

Now 172 is clearly between 128 and 191 so this would point to 172 as the
correct answer?

So the question is which is correct?

Thanks 

John