Actually it's definition of Class C probably isn't that crude. But I would
certainly be tempted to try to hack it to bypass the validation check one
way or the other; Unless someone knows how to get the configuration
validated in the face of errors some other way.
G.
-----Original Message-----
From: Gavin Scott <[log in to unmask]>
Sent: Thursday, May 11, 2023 1:27 PM
To: [log in to unmask] <[log in to unmask]>;
[log in to unmask] <[log in to unmask]>
Subject: RE: [HP3000-L] NMMGR - VALIDATION ERROR
I would copy NMMGR,NMMGRX and pull up NMMGRX in QUAD AND C "192.168"
"193.168" A;K and run NMMGRX and see what happens.
G.
-----Original Message-----
From: HP-3000 Systems Discussion <[log in to unmask]> On Behalf Of James
B. Byrne
Sent: Thursday, May 11, 2023 9:18 AM
To: [log in to unmask]
Subject: Re: [HP3000-L] NMMGR - VALIDATION ERROR
On Thu, May 11, 2023 09:57, Mark Ranft wrote:
> Hi James,
>
> NMMGR and the HP3000 is correct 192.168.0.x is a class C network
> subnet. I copied the below information from a internet search.
>
> Address ranges to be use by private networks are:
> Class A: 10.0. 0.0 to 10.255. 255.255.
> Class B: 172.16. 0.0 to 172.31. 255.255.
> Class C: 192.168. 0.0 to 192.168. 255.255 <-- This is class C by
> name, but it has a 255.255.0.0 range. Weird!
>
The C class determination for 192.168.0.0/16 was a curiosity and I
appreciate the clarification. I checked the RFC and found this:
RFC 1918 Address Allocation for Private Internets February 1996
3. Private Address Space
The Internet Assigned Numbers Authority (IANA) has reserved the
following three blocks of the IP address space for private internets:
10.0.0.0 - 10.255.255.255 (10/8 prefix)
172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
We will refer to the first block as "24-bit block", the second as
"20-bit block", and to the third as "16-bit" block. Note that (in
pre-CIDR notation) the first block is nothing but a single class A
network number, while the second block is a set of 16 contiguous
class B network numbers, and third block is a set of 256 contiguous
class C network numbers.
The problem remains that while NMMGR will validate 192.168.216.1 as a
gateway it will not validate 192.168.0.1 despite the IP net-mask being
255.255.0.0.
--
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