Help with Cisco 897 Router

[Karakas]

I connect my ISP provided ONT directly to the wan port on the cisco 897 and I can't access internet. I don't know if its my configuration or such or if it is my ISP. Can someone please give me some advice on what to do because I am pretty new to cisco CLI and cisco routers in general.

Thank you

[Stray_Bullet]

I would try adding the NAT (ip nat outside) to your WAN interface as @Flavio Miranda suggested. Everything else appears to be pretty good.

I would also do "show ip interface brief" to make sure you are pulling an IP from your service provider VIA DHCP.

[Karakas]

It doesn't seem to be pulling anything 

here it is:

Interface IP-Address OK? Method Status Protocol
ATM0 unassigned YES NVRAM administratively down down
BRI0 unassigned YES NVRAM administratively down down
BRI0:1 unassigned YES unset administratively down down
BRI0:2 unassigned YES unset administratively down down
Dialer1 unassigned YES DHCP up up
Dialer2 unassigned YES DHCP up up
Ethernet0 unassigned YES NVRAM down down
GigabitEthernet0 unassigned YES unset up up
GigabitEthernet1 unassigned YES unset up up
GigabitEthernet2 unassigned YES unset down down
GigabitEthernet3 unassigned YES unset down down
GigabitEthernet4 unassigned YES unset down down
GigabitEthernet5 unassigned YES unset down down
GigabitEthernet6 unassigned YES unset down down
GigabitEthernet7 unassigned YES unset down down
GigabitEthernet8 unassigned YES DHCP down down
NVI0 unassigned YES unset administratively down down
Virtual-Access1 unassigned YES unset up up
Vlan1 192.168.1.1 YES NVRAM up up

[Stray_Bullet]

It shows your interface as down. (GigabitEthernet8 unassigned YES DHCP down down). So are you positive that your service provider serves dhcp? Is there a reason you have the MAC address hardcoded into the config? Maybe a faulty cable?

It also shows your NAT virtual interface as down. (NVI0 unassigned YES unset administratively down down). This interface should automatically be enabled when you use NAT on an interface. Run this command to see if NAT is enabled. "show ip nat nvi stat".

I would try to "debug dhcp" with that command and see if your router is even talking to the ISP. I doubt it with being "down down".

[Karakas]

Nat is indeed enabled. Yes there is a reason which I hardcoded this mac address to the port I did it because I wanted to try to spoof the ONT into thinking that it is connecting to the ISP provided router. So basically I took the mac address from the ISP provided router and put it in there. Maybe my problem is ISP related or I do something wrong.