DHCP QUESTION

[MD Vid]

I posted here a few weeks ago on some problems that appear
to be with our DHCP. However from info I've read on the
net I'm still a little confused and we still have the same problem.
So I would like to state and ask the following.

Peer to Peer local RJ45 wired intranet problem.
1. When I check the configuration of each node in our local network
they all are configured the same, including the our Cad plotter which
has it's own ( 7th node) computer that does nothing except feed
plots to the plotter itself.
2.I don't think any of the nodes are servers nor do I see anything I
could configure to make them a "server".
They all have "Assign IP address Automatically" checked.
with the other option "Assign IP address Manually" not checked,
where you have to type in some address which I don't know
how you would determine.
3. One of the two nodes that have a problem does have a "unique"
distinction, in that it was created with it's own workgroup since
it is the secretary's machine. Could our Linksys router being getting
confused since it's on another workgroup than the engineer nodes?
4. In addition both of the problem nodes have the distinction of being
linked into the system via a hub (with a link cable to the uplink ports)
since the router did not have enough ports available. Do we need
another router instead of just a hub ? The intranet rougher and hub
are linksys brand and from the docs it appeared to be what we needed.

[Guest]

1. The Up Link port you mention in number 4. Is that on the Router or
on the Hub? With linksys routers they can usually tell what it's
hooked to and you won't need a crossover cable. Just hook the hub
into one of the regular ports on your router.

2. What Model is your router. The uplink port on the router shoud go
to the internet. (your cablemodem, dsl modem etc). The router doesn't
care what the workgroup name is but windows does.

3. What model is your hub.




On Sun, 22 Aug 2004 12:03:09 -0400, "D" <NoMail@NoSpam> wrote:
I posted here a few weeks ago on some problems that appearto be with our DHCP. However from info I've read on thenet I'm still a little confused and we still have the same problem.So I would like to state and ask the following.Peer to Peer local RJ45 wired intranet problem.1. When I check the configuration of each node in our local network they all are configured the same, including the our Cad plotter which has it's own ( 7th node) computer that does nothing except feed plots to the plotter itself. 2.I don't think any of the nodes are servers nor do I see anything I could configure to make them a "server". They all have "Assign IP address Automatically" checked. with the other option "Assign IP address Manually" not checked, where you have to type in some address which I don't know how you would determine.3. One of the two nodes that have a problem does have a "unique" distinction, in that it was created with it's own workgroup since it is the secretary's machine. Could our Linksys router being getting confused since it's on another workgroup than the engineer nodes?4. In addition both of the problem nodes have the distinction of being linked into the system via a hub (with a link cable to the uplink ports) since the router did not have enough ports available. Do we need another router instead of just a hub ? The intranet rougher and hub are linksys brand and from the docs it appeared to be what we needed.

[MD Vid]

>1. The Up Link port you mention in number 4. Is that on the Router oron the Hub?
it's on both the Router and the hub and is where the link cable is
plugged on both.
----With linksys routers they can usually tell what it's hooked to and youwon't need a crossover cable. Just hook the hub into one of theregular ports on your router.
I tried that a couple of weeks ago but I still get the "same" problem.
an IP address conflict.
-----2. What Model is your router.
Linksys
-----The uplink port on the router should go to the internet.(your cablemodem, dsl modem etc).
Ugh, hmm, I will have to maybe try something here, since the router
is hooked to a high speed modem the same way as it always was for
3 years before we added the two new nodes and had to buy the hub.
And everything worked great then. And it is not the uplink port. I will
have to look tommorrow when I get to work to see what port it is.
-----3. What model is your hub.\
Linksys same as the router.

[Guest]

On Sun, 22 Aug 2004 20:08:58 -0400, "D" <NoMail@NoSpam> wrote:
1. The Up Link port you mention in number 4. Is that on the Router oron the Hub?it's on both the Router and the hub and is where the link cable isplugged on both.----With linksys routers they can usually tell what it's hooked to and youwon't need a crossover cable. Just hook the hub into one of theregular ports on your router.I tried that a couple of weeks ago but I still get the "same" problem.an IP address conflict.

What Kind of High speed modem are you using. Some of them can do DHCP
also. The Motorola Cable modems and the Westell DSL modems can both
do DHCP. If this is the case you will need to disable DHCP in either
the modem or the router.

Be specific with the modem brand and model number and I'll try to get
you the setup page for that. Also while at work go to one of the good
computers and find it's ip address and also an ip address from one of
the none working computers to be sure they're in the same domain.-----2. What Model is your router.Linksys
mainly I wanted the model Number. But I'm pretty sure you have a 4
port version.
-----The uplink port on the router should go to the internet.(your cablemodem, dsl modem etc).Ugh, hmm, I will have to maybe try something here, since the routeris hooked to a high speed modem the same way as it always was for3 years before we added the two new nodes and had to buy the hub.And everything worked great then. And it is not the uplink port. I willhave to look tommorrow when I get to work to see what port it is.-----3. What model is your hub.\Linksys same as the router.

[MD Vid]

>What Kind of High speed modem are you using.Some of them can do DHCP also.The Motorola Cable modems and the Westell DSLmodems can both do DHCP.
I will get that info today at work.
----If this is the case you will need to disable DHCP in eitherthe modem or the router.
------Be specific with the modem brand and model number andI'll try to get you the setup page for that.
Thanks very much I would greatly appreciate that.
-----Also while at work go to one of the good computers andfind it's ip address and also an ip address from one of thenone working computers to be sure they're in the same domain.
Ok , I will try to get that today but we're very busy and it's
hard to get the engineers to give up their unit long enough for
me to ipconfig their nodes, and I'm having to leave early in the
day this week due to my mother having surgery. But I will
get this as soon a possible and sorry for not reading close
enough to see you needed the "model" and not just the
brand again. It sounds like you may have the answer to
our problem though.

[MD Vid]

Hardware info is as follows:
the dsl modem is a Fujitzu with 3 numbers as follows
orfast-r3-a-sa-br-pots-us
fc9660ra14
ajo5t6nc
-------
the router is a linksy model number befsr81
it has a WAN plug that's hooked to a cable going to the dsl data port
it has 7 more ports and one uplink port
------
the hub is a linksys model ezxs55w
it has an uplink port with 5 more ports

[MD Vid]

Oh also here are the ip addresses
one non problematic node
I.P. = 192.168.1.106
subnet = 255.255.255.0
default gate = 192.168.1.1
one problem node
I.P. = 192.168.1.102
subnet = 255.255.255.0
default gate = 192.168.1.1

[Guest]

On 23 Aug 2004 10:36:23 -0700, "KW" <kwidner@gmail.com> wrote:
Well Sir I had to disable the DHCP on my Westel DSL Modem and there is
a setting there to enable it in a bridge mode. Works pefectly now.

Linksys BEFSR8.1
Wap54g
Westell DSL Modem.

The IP address of the router will be passed from the Internet
Providers DHCP server to the Linksys router.

If his DSL modem is the DHCP server then the Internet Service Provider
will be able to see all his nodes.

NO, don't disable the DHCP on your modem. That provides an IP addressto your linksys router. The router should plug into the modem vian the"WAN" port. The modem provides an address to the router via DHCP (bydefault). Then the router provides private IP addresses via DHCP toyour hosts.This is of course how a standard setup would work. The router will notpass DHCP messages from the modem to the hosts without specialconfigurations, and I don't even think the Linksys line is capable ofdoing so.Do the two nodes that are having the problem ever work, only worksometimes, or what? Plug one of the known working machines into thehub, and one of the machines having problems, plug it into the spotvoided by the known good machine (do a swap), see what happens. Thenthat will point to the hub being your problem.

[Guest]

When the two computers with the problem stop seeing the other
computers, can they still see the internet?

I couldn't find the page for the fujitsu modem. I origanlly thought
they couldn't see out. But as I understand it now they can't see the
rest of the network. Is this correct?

Does powering down and then restarting just the hub work or do you
need to power down the router?

When the computers stop reponding to the rest of the network can they
still see each other throug the switch? You might try hooking the
switch into one of the other ports beside the uplink port. The best I
remember (if this router is 3 years old.) the uplink port should also
function as a regular ethernet port. However on some of the early
models the uplink port and the port next to it could not be used at
the same time. Make sure that is not the case. This may also be true
of the swich.




On Sun, 22 Aug 2004 12:03:09 -0400, "D" <NoMail@NoSpam> wrote:
I posted here a few weeks ago on some problems that appearto be with our DHCP. However from info I've read on thenet I'm still a little confused and we still have the same problem.So I would like to state and ask the following.Peer to Peer local RJ45 wired intranet problem.1. When I check the configuration of each node in our local network they all are configured the same, including the our Cad plotter which has it's own ( 7th node) computer that does nothing except feed plots to the plotter itself. 2.I don't think any of the nodes are servers nor do I see anything I could configure to make them a "server". They all have "Assign IP address Automatically" checked. with the other option "Assign IP address Manually" not checked, where you have to type in some address which I don't know how you would determine.3. One of the two nodes that have a problem does have a "unique" distinction, in that it was created with it's own workgroup since it is the secretary's machine. Could our Linksys router being getting confused since it's on another workgroup than the engineer nodes?4. In addition both of the problem nodes have the distinction of being linked into the system via a hub (with a link cable to the uplink ports) since the router did not have enough ports available. Do we need another router instead of just a hub ? The intranet rougher and hub are linksys brand and from the docs it appeared to be what we needed.

[MD Vid]

>When the two computers with the problem stop seeing the othercomputers, can they still see the internet?
No
--------I couldn't find the page for the fujitsu modem. I origanlly thoughtthey couldn't see out. But as I understand it now they can't see therest of the network. Is this correct?
The cannot see out, nor can they see any local nodes, they cannot see
nothing. If only one node has a problem then even though "it" cannot
see, we can still see it. But, at least twice when "both" problem nodes
cannot see, then we cannot see them either.
-------Does powering down and then restarting just the hub work or do youneed to power down the router?
We've always restarted the switch block that runs the entire "intranet
modem, router and hub. I've never powered them down separate.
-----When the computers stop reponding to the rest of the networkcan they still see each other throug the switch?
No
-----You might try hooking the switch into one of the other portsbeside the uplink port. The best I remember (if this router is3 years old.) the uplink port should also function as a regularethernet port. However on some of the early models theuplink port and the port next to it could not be used at the sametime. Make sure that is not the case. This may also be trueof the swich.
Yes I knew of this and left the port next to uplink port empty.
actually the instructions said to leave it empty on the hub box.
And it is still empty, but if I try to plug the uplink cable into
the port instead of the uplink the node doesn't come online
at all.
----
Of all three items the router is the only one that seems to have
a switch that can be set to two options. One is marked "J"
and the other is marked "LX". It is now and has always been
set to "J". It worked this way for 3yrs before we added the
hub.

[Guest]

I'm sorry to keep asking questions but it must either be the
hub/switch or you have a software problem.

The two problem nodes,
What os are you running?
Does either have more thant one ethernet port?
Are you using any protocol other than TCP/IP?

I had a problem on a network once with WinXP pro. One of the
computers had 2 ethernet ports and when the setup wizard ran it set
itself up in bridge mode. Occassionaly it would stop all traffic on
the wirless side of the network. Similar, but not exactly the same
symptons as you have.

[Guest]

When the two nodes go down,
1. can you ping the router from one of the dead nodes.

ping 192.168.1.1

2. Look in the DHCP clients table of your router and see if they are
listed. http://192.168.1.1/Status_Lan.htm. The page may be different
as I'm now running BEFSR81 ver 3 router.

[MD Vid]

Hey, I just got in, and read these. First off I want to
thank all of you for really being very helpful. And today
when I went in early before anyone else was there I was
able to check things out better and using info you gave me
I may have found the problem. The router etc are stuck in
the back of a crowded little room full of old plans in boxes.
And you have to lean over and squeeze between two file
cabinets to get to everything. Anyhow I took my time and
checked everything out well. The cable linking the router and
hub was hooked into the "uplink" port on both the router and
the hub. So then I tried plugging the uplink cable into a normal
port on the router and into the "uplink" port on the hub then
everything appears to work ok, or at least it did all day today.
I realize that you prolly told me this already but I didn't quite
catch it since the way I originally had tried a few weeks ago
was the cable in the uplink in the router, and normal port in the
hub. But that did not work and I dropped the ball in not thinking
to reverse the scenario. But I have learned a great deal from you
people about DHCP and net diagnostics.
Thank you again.

[Guest]

Thanks for letting us know how it turned out.

On Tue, 24 Aug 2004 19:45:16 -0400, "D" <NoMail@NoSpam> wrote:
Hey, I just got in, and read these. First off I want tothank all of you for really being very helpful. And todaywhen I went in early before anyone else was there I wasable to check things out better and using info you gave meI may have found the problem. The router etc are stuck inthe back of a crowded little room full of old plans in boxes.And you have to lean over and squeeze between two filecabinets to get to everything. Anyhow I took my time andchecked everything out well. The cable linking the router andhub was hooked into the "uplink" port on both the router andthe hub. So then I tried plugging the uplink cable into a normalport on the router and into the "uplink" port on the hub theneverything appears to work ok, or at least it did all day today.I realize that you prolly told me this already but I didn't quitecatch it since the way I originally had tried a few weeks agowas the cable in the uplink in the router, and normal port in thehub. But that did not work and I dropped the ball in not thinkingto reverse the scenario. But I have learned a great deal from youpeople about DHCP and net diagnostics.Thank you again.