How do I connect a new router from switch to wall jack?

Hello, I am replacing a DLink router with an ASUS RT-AC66U router. So I disconnected the old router and connected the new ASUS. Then modify the configuration page of the new router and set my SSID and pswd and chose "access point mode". However once I rebooted  and connected to the internet, it was a no go.

The office has fiber connection demarked in a server room location which is then wired to a separate section of the building going into a Cisco Small Business 16 port 10/100 switch. The switch is providing Internet connection via run cables to the wall RJ45 drop located in the office suite where I am attempting the new router swap.

Is the newer routing clashing with the older switch device? Any input is appreciated.
Thanks
IT GalAsked:
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JohnBusiness Consultant (Owner)Commented:
The new router could be different.

Did you connect a LAN port on the router to the wall jack or the WAN port?  How was the Dlink connected with regard to ports?
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IT GalAuthor Commented:
Hi John thanks for responding. I connected the WAN port. The blue port on the image Asus-RT-AC66U.docx.
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JohnBusiness Consultant (Owner)Commented:
I think you should connect to a LAN port because your wall jack is not really an ISP, just an internet connection.

What IP do you get if you plug a computer into the wall outlet (no router).
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IT GalAuthor Commented:
When I connect the RJ45 from the outlet straight to the laptop the network link keeps trying to connect in a continuous loop. No connection.
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IT GalAuthor Commented:
The Admin account on the old DLink router was changed so I am not able to access the configuration on the router. When I did IPconfig with the Dlink connected got 192.168.0.101 private address. I also saw a 24 class IP address written on the Dlink router so I am thinking it has a subnet. Not sure.
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JohnBusiness Consultant (Owner)Commented:
That is indeed strange.

Who is giving you Internet?  What do they say about connection to it?  This will help us.

Do you have the old router?  Can you put it back and see if it works. Then get the settings from it.
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JohnBusiness Consultant (Owner)Commented:
Can you at least put the DLink back and see if it works?  Even if you cannot access, this would be helpful.

192.168.0.101is a normal address setup - suggests the .0 subnet for its use.
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JohnBusiness Consultant (Owner)Commented:
255.255.255.0 is the subnet mask for 192.168.0.x/24 so I think it just means you had the whole subnet.

http://en.wikipedia.org/wiki/Subnetwork
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IT GalAuthor Commented:
The old Dlink router is connected and is working. I couldn't leave the office without connectivity. The Dlink config has the following:
Windows IP configuration
Node Type : Hybrid
IP Routing Enabled: No

Ethernet adapter Local Area Connection:
DHCP Enabled: Yes
Auto config enabled: Yes
DHCP, DNS, Default Gateway: 192.168.0.1 (they all have the same IP address)
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JohnBusiness Consultant (Owner)Commented:
Is the DLink connected by its WAN port?  You can do this to isolate your side from the Internet side. But I have seen this both ways. Let's make the new router connect on the same port (say WAN) as the DLink.

Then make sure the new router is set for DHCP (that is, it picks up an auto IP from the wall).

Then hook it up and what IP do you get from a LAN port on the new router?
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IT GalAuthor Commented:
The office left for the day so I will let you know what it reads tomorrow. But I did setup the new router as the old one was; wall to WAN. However I didn't get any connection at all. I was only able to access the ASUS config/settings page.

I notice that the node says: Hybrid. On the ASUS router there are 3 options, I will verify those settings tomorrow.
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IT GalAuthor Commented:
Correction: When I say I didn't get any connection I mean I didn't get Internet access.
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JohnBusiness Consultant (Owner)Commented:
I think maybe the new router may not have been set for DHCP (It may have assumed some other setting for regular WAN from an ISP).
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Dave BaldwinFixer of ProblemsCommented:
Sometimes you need a username and password to connect to the WAN provider.
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IT GalAuthor Commented:
Hello,
I found out that the old router has a static IP address. My plan is to transfer the IP from the old router to the new and see if that will solve the connection issue.
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JohnBusiness Consultant (Owner)Commented:
Please let us know. Getting settings from the old router was something we discussed earlier.
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IT GalAuthor Commented:
Thank you John for all your efforts and keeping up with me. Here is what solved my issue. I obtained the Admin UN and PW for the old router and configured the new router with the static IP address from the old router to the new one and that was the answer.
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IT GalAuthor Commented:
I obtained the admin account from the previous administrator to access the old router to get the config.
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