Router 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?

 

[Guest]

Is the "closet" enclosed and door shut. If it is perhaps, it is heat related.

 

[noochie]

Yes the door is closed, but it is not warm at all. There are two
networks in this closet and the other one is and has been working
great. I downloaded LANScan and ran it. While it was running, the IP
192.168.0.1 kept showing up. My network is 192.168.2.n. I dont know
how the other network is set up, but could there be some sort of cross
over between the two and causing my problems?

 

[noochie]

Yes the door is closed, but it is not warm at all. There are two
networks in this closet and the other one is and has been working
great. I downloaded LANScan and ran it. While it was running, the IP
192.168.0.1 kept showing up. My network is 192.168.2.n. I dont know
how the other network is set up, but could there be some sort of cross
over between the two and causing my problems?