Office Network Setup Question / Issue

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starbase47

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Jul 22, 2016
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I have a small office network… There is a Comcast modem, a switch and a D-Link Wifi router.
The Comcast modem has an IP Address of 10.1.10... but the D-Link Wifi router has an IP Address of 192.168.... I believe this setup is causing some connection issues for some older PC’s on the network after it goes down and the Comcast Modem requires a reset.

For example, when the entire network goes down (no internet due to an outage) I have to reset the router. When I do some of the computers in the office do not connect to the Wifi after this happens. I have to reset the Wifi router to get them to connect again.

I have a few questions…
*Is this due to not using a static IP address on the Comcast Modem and the Wifi router?
*Should the Modem and the Wifi Router have the same IP Address range? (i.e. Start with either 10.1.10 or 192.168)
*If I remember correctly our older Comcast Modem had a static IP setup. Should I switch the Comcast Modem back to the static IP? Do I leave the Wifi router as is?

Looking for some guidance since I’m somewhat new to all this. I want to make sure that the network is as stable as it can be and to prevent any connection issues. Thanks!
 
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gbb0330
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gbb0330

gbb0330

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Apr 28, 2015
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its important to understand that both your modem and your router actually have 2 IP addresses a public facing (WAN) and internal facing (LAN).
so its perfectly normal for a router to have a WAN ip address in the 10.1.x.x range and an internal facing (LAN) 192.168.x.x
 
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starbase47

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Jul 22, 2016
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Thanks for your thoughts! So, I do have the right setup there... The other part to my question I still can't seem to resolve... I have some single band laptops in the office (only use the 2.4ghz band on the WiFi router) and they keep getting disconnected... For example, the laptops where working over the weekend. When I came in on Monday they would not connect to the WiFi. We did have a severe thunderstorms over the weekend that could have knocked out power to the office. Once the router came back up those devices would not connect to it until I reset the router again. Very odd behavior that I can't seem to find a solution too. Any thoughts on this would be appreciated. Thank you!
 
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gbb0330

gbb0330

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Apr 28, 2015
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you can't expect enterprise level reliability from old consumer grade equipment.

right now you have 2 suspects, the office infrastructure and the old laptops.

if I were you I would buy a nice enterprise quality wireless access point, like the UniFi UAP-AC-LR-US

Turn off the D-Link wireless or replace the D-link router with something like Ubiquiti ERLite-3, or get a Sonicwall (router+firewall)

for a few hundred bucks you can have a decent small office infrastructure, this may not resolve all issues with the old laptops but at least you will know that the infrastructure is solid and you can eliminate it from the list of suspects.

 
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