Network Issues

[noochie]

Problem: Entire network drops, IP addressing from wired/wireless
router stops. IP 169.n.n.n on all workstations. All connections on
router and switch are good and lit. Normal activity seen on both the
router and switch.


Measures Taken: Resetting router (corrects problem for about an hour
or a day), upgraded firmware on router, replaced router (3 times, 3
different Linksys wired/wireless models), tested cable from router to
switch (no problems found).


Network setup: 23 users, D-Link 24 port switch, Linksys 4
port/wireless-G router DHCP enabled, DSL (PPoE).


Questions: Can another wired/wireless network cause DHCP issues with
my router? Both networks are in the same closet? If not, what can it
be?

 

[Charlie Tame]

I am just guessing here but do any of the workstations have a DHCP server
running by accident? I have no idea if this could cause your problem but
have seen an XP Pro machine misconfigured that caused "Some" problems.

Just a suggestion, not a networking expert by any means

Charlie

 

[Kurt]

That's gonna take some deeper digging to solve. First step, what are the
lights on the switch/router doing. ANy of them blinking like crazy? could be
a bad switch, port, NIC on a workstation, virus. Other than that, plug a
workstation directly into the router and see if it only get an APIPA address
on the ones connected to the switch. D-Link and other cheap switches can't
be managed so you can't set up a monitor port for packet sniffing. Assign
static IPs on known problem workstations and see if you can ping after the
others show the problem. It's a logical, methodical process of elimination.

....kurt

 

[noochie]

All the lights on the router and switch seem to be normal. Nothing
going wild, just looks like regular traffic across the board. Even
when everyone is down, the lights flicker normally. I'll take a closer
look next time. I also isolated a workstation and connected it to ther
router directly. They went down too. Did I mention that clients on
the wireless also go down? Well they do, just like everyone else.
Usually just reseting the router cures the problem, but just for a
short time. Antivirus is up to date.

 

[Kurt]

I've had problems with routers that just stop working after a while. Not
anything with the individual router, but just the software for the entire
line. I wejnt to the web and was able to find numerous posts and references
to the problem, the vendor's attempts to fix it (unsuccessfully), and
finally to go with a different brand. I think you said your was a linksys,
which is NOT the one I was having problems with, but do a web search on the
brand and model and see what you get.

....kurt

 

[Kurt]

If you unplug the switch from the router and reboot the workstation directly
connected to the router, does it get an IP address?

....kurt