Re: two subnets on one network
- From: "Herb Martin" <news@xxxxxxxxxxxxxx>
- Date: Sat, 24 Feb 2007 05:38:02 -0600
"RickyVene" <RickyVene@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:5D803CF7-64B8-42C2-A51B-D87458160B6E@xxxxxxxxxxxxxxxx
I have been to my company only two years and I've discovered that the
technicians are using different subnets than the 2003 subnets of 16 bits.
Subnet MASKS, the subnets are the networks the masks are the 255.255.etc
that correspond to the /24 /16 format
They are using 24 bits so that their Siemens software for connecting to
the
machine will connect. And they have no problem on it.
A subnet mask is used by a machine to decide if it is on'the SAME subnet
as the destination. If the masks are different they are likley wrong on
some
machines, but this may not even matter if you don't have a LOT of machines
and start numbering from the bottom up.
If a machine incorrectly thinks it is on a different network it will send
the
message to a Router, which may in fact send it to the correct destination.
If the machines are really on the same "wire" then the machines will then
be communicating but doing so inefficiently. 1->Router-2->1 (or mayby
1->Router->2->Router->1) even though they could be doing 1<->2.
Is this going to be a problem on my 2003 network? I noticed that my client
Not as long as everything "routes" correctly but it might be inefficient and
wasteful of bandwidth.
XP logon is so slow sometimes and I don't think this is DNS issue.
Why not? DNS is a common reason for such issues.
How slow? Do all your DCs pass "DCDiag /c" with NO WARN or
FAIL messages?
Is there a collision between that configurations?
No because, or as long as, it works for routing.
It MIGHT be contributing to slowness but probably not much.
My technicians is not always
connecting to the machines but the machines are always wired to the
network.
Not...connecting HOW?
Do you by chance have you machines NIC->IP->DNS setting set to
include the ISP or other external DNS? They must NOT do this and
it is a common source of both "slow logons" AND failure to connect
INTERMITTENTLY.
This is my super subnet, 192.168.255.255.
Your what?
That looks like NEITHER a Supernet nor a subnet, NOR a subnet mask.
The subnet mask of my 2003 domain is 255.255.0.0.
"Domains" don't have subnet masks so we must presume you just mean
the mask that happens to be used by those machines.
My servers are using
192.168.1.x and 192.168.2.x. My two DHCP are using 192.168.4.x and
192.168.5.x.
Because you are using the "third octet" to distinguish machines you WILL
be communicating inefficiently with these odd masks.
You might as well fix it since whoever set it up had no real idea how to
configure a network.
All others IP are used by users who wants to have static IP.
What does the above mean?
The machine
are configure on 192.168.20.1 and client is using 192.168.20.2 to connect
to
the machine. The subnet is 255.255.255.0 or 24 bits mask for the machine
connection to work.
Is this going to be a problem?
It isn't apparently prevenint communicate but go ahead and fix it.
IF you have only "one subnet" (broadcast domain) then just make all of the
mask 255.255.0.0 (the shorter mask).
.
- References:
- Re: two subnets on one network
- From: Myweb
- Re: two subnets on one network
- Prev by Date: Re: Infrastructure Role and GC's
- Next by Date: Re: Local Administrators & Active Directory
- Previous by thread: Re: two subnets on one network
- Next by thread: Re: two subnets on one network
- Index(es):
Relevant Pages
|
Loading
