I got a second hand Netgear D7800 yesterday. It worked fine on stock firmware. I flashed OpenWrt stable via TFTP and it runs fine, apart from it having no internet access.
I have a vague recollection of reading something about ports being swapped, but I can't find the reference now. Anyway, I've tried connecting the internet cable into the WAN port, as well as various LAN ports. I've tried changing the interface of WAN under physical settings for WAN.
I'm using a PPPoE FTTC connection. ie. there's a locked down box that typically connects to the WAN port on routers, and that's all the configuration that's needed (apart from entering the username and password for my provider).
It might help to know your ISP, as it may have specific settings for their flavor of PPPoE if you’re connecting directly to the drop. If it’s Ethernet between the ISP box and your router, check to see if the WAN interface is getting an IP address.
Just to clarify here, I read this as you using VDSL with a(n external) VDSL modem - if so, most ISPs require a specific VLAN tag (specific to the ISP in question) to be used on WAN.
Leaptel. I'm in Australia, so you wouldn't have heard of them. I know that the PPPoE doesn't require VLAN tagging in my case. I've used dd-wrt on a R7000 without any issues.
Yes, it's ethernet between the ISP box and WAN. It just reports that connection failed.
The fibre comes to the curb and then uses the copper up the driveway to the ISP box. The ISP box has a built in modem of sorts, so I'm using the D7800 as a router only. I'm not sure if I need to adjust any settings in OpenWrt as a result of this.
Test1
In interface > wan > advanced
Change MTU to 1452
If it works bump it up to 1480
nb: as mentioned... vlan 100 comes up alot with these connections... i don't know if the OEM auto detects MTU/VLANID.....
Test2
Use a PC direct.
Test3
Verify the WAN mac address is the same for OEM firmware on the WAN port.... most NTD don't like seeing different MAC addresses. Or you could just power down the VDSL modem for 10 mins....
Rarely a call to your ISP is required to "fix" "stuck" MAC associations.... But setting it to the old one is and easy way to test.
Network > interfaces > advanced > mac
Test4
Change your WAN to DHCP ( not pppoe and see what happens ) ... set it back if no change ... you could also try PPPoATM
Test5
As for swapping the ports, in the page above swap setting between CPU0 and CPU1 if you want to test that... swap it back if no change... you may need to connect your PC to the WAN port to do that.
What do you mean exactly? Enter my PPPoE details into the computer?
I've had this problem before with another ISP, but they used DHCP. I've happily switched between routers without even ending the connection with other routers with this provider.
I swapped this and played around a little. No difference.
Thanks for that. I'll give it a try.
However, it's probably worth me noting that I bought (and I'm returning to Amazon) a GL.Net B1300 earlier in the week and it didn't require any tweaking to connect to the same provider, either with its customised version of OpenWrt or with the vanilla OpenWrt that I flashed. This leaves me wondering whether the D7800 might end up on eBay and me replacing it with an EA6350v3 or an RT-AC58U. I'm not sure that many people on here are using the D7800.
I tried adding the VLAN tag and it made no difference. The WAN interface definitely is eth0 in the physical settings, right?
I came across D7800 wan not working with 100Mbit, and I'm wondering if sticking a switch between the D7800 and NTD is the next step. If only my wife wasn't up and whinging about her wifi not working, I could do the 3 minute test now.
Putting a switch between router and modem is definately worth a test. As would doing a factory reset (firstboot) on the d7800 and start over from scratch (as the switch config should be o.k. as is, with your previous tests maybe skewing the results).