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My network consists of a modem which is connected to the router Buffalo WHR-HP-G54 (DD-WRT v24-sp2) where the signal is transmitted over the powerline adapters (D-Link DHP501-AV) to my Desktop PC (Ubuntu 14.04 LTS).
Ethernet over Power (EoP) problem
Layer-1 is working correctly. I successfully connected my PC to the router directly via RJ45 on the wired port. Pinging speed was 5x faster in connecting to the BUffalo router than to my modem. So the problem is in the EoP, and not probably in the router configuration.
Wiring of the house
The wired connection works with the previous modem but not with the current. There is only the house wiring now between my router and my PC, minimizing the effect of other cables. It may be the case that the power of the signal has different in the new modem, so interfering somehow the wired connection.
Router configurations
I have these Services in the router:
DHCP Server Enabled
WRT-radauth Disabled
WRT-rflow Disabled
MAC-upd Disabled
CIFS Automount Disabled
Sputnik Agent Disabled
Wired
Settings about IP addresses managed by DHCP
% Automatic DHCP so not known exact handled IP range
WAN IP 192.168.1.39
LAN IP 192.168.2.1
Start IP address 192.168.2.100 % so I think the range is ***.1 - ***.100
Advanced routing > Operating mode > Gateway % I am not sure about this: other options Router, OLSR router, RIP2 router, BGP
Port setup: WAN assignment vlan1 where everything *default* and not unbridged
I can detect the network in my Ubuntu 14.01 but the system cannot establish internet connection in the wired connection. In Buffalo's wireless connection, the internet connection can then again be reached but not in the wired. I do not understand this.
ping google.com gives ping: sendmsg: Network is unreachable in the wired connection. traceroute google.com gives nothing in the wired connection.
My wired connection has worked always before through the powerline adapter. We changed the modem some months ago which caused now the first problem. It may be the reason but I do not understand why.
cat /etc/resolv.conf gives in the Desktop PC with Ubuntu 14.04 LTS:
# Dynamic resolv.conf(5) file for glibc resolve(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND - - YOUR CHANGES WILL BE OVERWRITTEN
Wireless
I have only basic settings in wireless connection:
I have not changed anything such that the wireless would be connected to a different subnet so it should not be the case.
Why you cannot reach the internet connection in the wired network of Powerline adapters?
Léo Léopold Hertz 준영
Posted 2015-12-27T21:28:44.787
Reputation: 4 828
Need more info. What is your routers ip? What range of addresses is being handed out by DHCP? Is your wireless and wired network on the same subnet? Is your wireless VLANed to a different subnet? Does your pc get an IP address within the range of addresses you would expect a machine requesting an address via DHCP to get? What are you using as a DNS server? When you try to ping Google.com from Ubuntu, what error message is displayed in the terminal? Same question, but replace ping with trace route. Has your wired connection always worked or has it always had issues? Any changes? – Richie086 – 2015-12-28T07:31:55.673
I would assume someone with 1.5k rep would have included more relevant info with the question you have asked btw. You are far from being a noob here, masi. Please edit your question and include answers to the questions I have posed and hopefully we will be able to get you back up and running. – Richie086 – 2015-12-28T07:35:19.320
What do you mean by this What are you using as a DNS server? – Léo Léopold Hertz 준영 – 2015-12-28T07:50:21.280
Does your router provide local dns translation? Are you using your ISPs dns? Are you using Google (8.8.8.8) or Verizon (4.2.2.2-7) public dns? FreeDNS? I just was wondering how you were resolving names to numbers. – Richie086 – 2015-12-28T07:53:49.840
Run it as a separate command. In Windows the command is tracert, but in Linux it's the full command, traceroute – Richie086 – 2015-12-28T07:56:21.863
paste the contents of /etc/resolv.conf and that will show me the DNS servers you are using. – Richie086 – 2015-12-28T07:58:46.517
4Step 1 is always check that layer-1 is working correctly. Did you try plugging something directly into the router on the wired port? If that works, then you know the problem is in the EoP, but if it doesn't work, the problem is in the router configuration. – Ron Maupin – 2015-12-28T08:01:46.010
@Masi is your WAN IP actually WAN IP 192.168.1.39 or did you edit that info as to not advertise your public IP? – Richie086 – 2015-12-28T08:03:02.553
@RonMaupin EoP Problem. Connecting directly to the router wired without powerline adapters succeeds. There is something in the powerline connection that fails the case. – Léo Léopold Hertz 준영 – 2015-12-28T11:22:46.787
@Richie086 My WAN IP is 192.168.1.39 in this device. – Léo Léopold Hertz 준영 – 2015-12-28T11:23:11.773
@Masi, do the EoP receivers have any sort of diagnostic LEDs or a reset switch on the unit??? The only experience I have with EoP is with trend net, and the ones I use here at home are great and have diagnostic LEDs and reset buttons. Oh I just thought of something, are either of the EoP units plugged into a power strip or extender? If so, that will cause problems with EoP because most surge protectors and power strips contain large capacitors that help to regulate drops or sudden increases in power. The same mechanism also ends up filtering out the communication between transceivers. – Richie086 – 2015-12-28T12:02:49.010
Another issue could be poor wiring at your house or two wall sockets that are not part of the same electrical circuit. – Richie086 – 2015-12-28T12:05:10.983
@Richie086 I added the description about the wiring of the house problem in the body. – Léo Léopold Hertz 준영 – 2015-12-28T12:31:42.400
2@Masi Whats the local IP of the router? Does it match the EoP master? This is a common problem as they powerline adapters have fixed addresses. – Linef4ult – 2015-12-28T20:46:29.510
1@Linef4ult Problem solved! Thank you for your answer! I changed one of the powerline adapters to be absolutely identical with the other one. The wired network works now. Please, make your comment an answer if you want I accept it. – Léo Léopold Hertz 준영 – 2015-12-29T07:50:56.477