Re: Possible routing problem because of subnet mask change.
- From: Steve <newnetworkguy@xxxxxxxxxxxxxxxx>
- Date: Wed, 7 Mar 2007 10:04:30 -0800
I'm sorry, I told you that I was new.
Could my DNS Servers be setup wrong? We have two servers that are configured
as DNS Servers.
One of our users keeps having this problem with his laptop. I had him run
ipconfig and tell me his IP address, but I can't ping it. He is able to get
to everything (for now). I looked in the DHCP Leases and it lists 2 different
addresses for him that don't match the one he gave me. The second one is for
his wireless card. If I try and ping him by host name, it tries checking for
it at a 4th address.
"Herb Martin" wrote:
.
"Steve" <newnetworkguy@xxxxxxxxxxxxxxxx> wrote in message
news:588C804E-7DC9-4769-BA26-C4B4853726F5@xxxxxxxxxxxxxxxx
We had to change our subnet from 255.255.255.0 to 255.255.0.0
That is a subnet MASK not a subnet. And please expect us to help
you by correcting both your terminology and technical mistakes so
that you can learn how all this works.
We WANT to help....
...because we were running out of room.
So you had more than about 250 machines on a single subnet, or broadcast
domain? (generally a single simple hub or same VLAN of a true switch).
I'm new to the network side of things. Since we moved,
we're having problems with things losing connections. Some laser printers
won't connect when we configure them with an address outside the old
range.
[Being new to networking may make it difficult to answer the questions we
will
need to ask -- but hang in there and we will help.]
What sort of connectivity devices do you have? Do you manage these (now)
or does someone else do this?
You might have simple hubs (multiport repeaters which are frequently called
"100/10 Mbsp switches" even though they are not true switches), or bridges
(not very likely), or some sort of advanced (true) switch.
If you have the switch it gets even more complicated (or at least detailed)
since
a switch can be either a Bridge (layer 2) that passes broadcasts, or a
Router
(layer 3) that does NOT pass broadcasts, or some hybrid combination of
these two even a VLAN type switch.
Our label printers lose the connection and we have to reset the print
server
on them. We're a small company, less than 80 computers.
Losing a connection implies that it works SOME of the time and so is
unlikely
to be a true routing or hardware problem unless the hardware is only
intermittantly bad.
Do I need a router now that I expanded the subnet?
No, but I am answering the question you are asking -- rather than what you
might better need to know.
Your choices were to expand the network range (as you did) by reducing
the length of the subnet mask, OR adding a new subnet.
IF you were to add a new subnet then you would typically have to employ
a router to connect the two (or more) subnets together.
--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com
(phone on web site)
- Follow-Ups:
- Re: Possible routing problem because of subnet mask change.
- From: Herb Martin
- Re: Possible routing problem because of subnet mask change.
- References:
- Re: Possible routing problem because of subnet change.
- From: Herb Martin
- Re: Possible routing problem because of subnet change.
- Prev by Date: Open File Security Warning
- Next by Date: Re: Possible routing problem because of subnet mask change.
- Previous by thread: Re: Possible routing problem because of subnet change.
- Next by thread: Re: Possible routing problem because of subnet mask change.
- Index(es):
Relevant Pages
|
