peter-peter Posted March 21, 2008 Report Share Posted March 21, 2008 We are trying to set up internet in another room using mains borne networking, home plugs. we conect to internet at present using ntl equipment through fast ethernet. Connections are: PC1----------------------------rou PC2----homeplug~~~~~homeplug---ter----cable modem Where --- is an ethernet cable and ~~~~ is mains. (The homeplug device transmits and receives ethernet over mains) PC1 connects to Internet OK. PC2 reports 'connection has limited or no connectivity' I have seen another report of 'cannot assign by DHCP' LED's on homeplugs indicate they are talking to each other. Broadband is Virigin via cable TV (formerly NTL). your help would be greatly appreciated ///pete/// Quote Link to comment Share on other sites More sharing options...
dustyfox Posted March 21, 2008 Report Share Posted March 21, 2008 We are trying to set up internet in another room using mains borne networking, home plugs.we conect to internet at present using ntl equipment through fast ethernet. Connections are: PC1----------------------------rou PC2----homeplug~~~~~homeplug---ter----cable modem Where --- is an ethernet cable and ~~~~ is mains. (The homeplug device transmits and receives ethernet over mains) PC2 reports 'connection has limited or no connectivity' I have seen another report of 'cannot assign by DHCP' My computer says the same. in the bottom right corner is their a symbol with two computers and and yellow explanation mark, click on it and click the support tab and then click on repair. not sure if this will work but my internet is working alright even thou it says limited connectivity. Quote Link to comment Share on other sites More sharing options...
pin Posted March 21, 2008 Report Share Posted March 21, 2008 (edited) Just so I have this right... Both machines are plugged into the router, one via ethernet only and one ethernet into homeplug and then out of that into the router? I'd guess either :- 1) the router isn't configured to provide addresses via DHCP 2) the second machine isn't configured to attempt to obtain an address via DHCP or doesn't have the required protocols installed 3) The homeplugs are not working properly Tell me what address your first machine, which works, has? (192.168.0.2 etc) ( Start-Run->cmd type ipconfig /all and hit enter) Edited March 21, 2008 by pin Quote Link to comment Share on other sites More sharing options...
peter-peter Posted March 21, 2008 Author Report Share Posted March 21, 2008 Thanks for the quick replies pin,dustyfox. Quote: Both machines are plugged into the router, one via ethernet only and one ethernet into homeplug and then out of that into the router? Answer: YES Here is part of the output for ipconfig /all on PC1 (the ones thats working OK): Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IP Address. . . . . . . . . . . . : 82.27.47.36 Subnet Mask . . . . . . . . . . . : 255.255.252.0 Default Gateway . . . . . . . . . : 82.27.44.1 DHCP Server . . . . . . . . . . . : 62.252.96.20 DNS Servers . . . . . . . . . . . : 194.168.4.100 194.168.8.100 NetBIOS over Tcpip. . . . . . . . : Disabled Lease Obtained. . . . . . . . . . : 21 March 2008 20:02:10 Lease Expires . . . . . . . . . . : 27 March 2008 09:36:50 I have had PC2 on the Internet just now. Here is how: 1. Power off both PC's 2. Power off cable modem for 1 min, then on 3. Power on PC2 4. Hey presto! Internet on PC2 5. Power on PC1 6. PC1 won't connect. There was a clash of IP addresses it said. I have now changed it back so PC1 connects and PC2 won't. I don't really understand DHCP or TCP/IP ..... Are the PC's requesting an IP address through DHCP, and my server is providing only one address ? and I should get to the stage where the router is requesting an IP, and PC1/PC2 are on a LAN with the router ? [ I don't know what I'm on about of course ] I cannot connect to my router on 192.168.1.1 now either ! [ should that need configuring ] Thanks for great help! Is there anything else you can suggest? //Pete// Quote Link to comment Share on other sites More sharing options...
pin Posted March 21, 2008 Report Share Posted March 21, 2008 What router do you have? The PC which connects first is getting a "real" IP, the static IP your provider gives you. The ideal setup is where the router its self gets this "real" address, with it providing "private" IP's for the computers on your LAN. Clearly this isn't happening and the first PC to DHCP is getting the WAN IP. NTL you said? Just let me know the router you have, it doesn't sound like you have NAT set up correctly. I freely admit I've never owned a cable modem or had a cable setup, although there should be no difference in theory. In your network, the ideal setup would be :- Enable NAT on the router, set the WAN interface to DHCP the 82.xx address The router would have 192.168.1.1 on the inside LAN interface PC1 would have 192.168.1.2 PC2 would have 192.168.1.3 Default gateway for the PC's would be 192.168.1.1, assuming the router does DNS forwarding the DNS server for the LAN pc's would be 192.168.1.1 Quote Link to comment Share on other sites More sharing options...
The Great Cornholio Posted March 22, 2008 Report Share Posted March 22, 2008 Peter, Although I'm not quite in Pin's league. I am also looking into your problem. As Pin has already asked, I also would like to know which router you have. Also do you have PC-guard installed on both PCs.? Pin, Virgin media software, such as PC-guard, often has a habit of interfering where not needed in my experience! Quote Link to comment Share on other sites More sharing options...
pin Posted March 22, 2008 Report Share Posted March 22, 2008 TGC, glad of the help mate, as said don't have any direct experience of cable setups! Quote Link to comment Share on other sites More sharing options...
peter-peter Posted March 22, 2008 Author Report Share Posted March 22, 2008 What router do you have? The PC which connects first is getting a "real" IP, the static IP your provider gives you. The ideal setup is where the router its self gets this "real" address, with it providing "private" IP's for the computers on your LAN. Clearly this isn't happening and the first PC to DHCP is getting the WAN IP. NTL you said? Just let me know the router you have, it doesn't sound like you have NAT set up correctly. I freely admit I've never owned a cable modem or had a cable setup, although there should be no difference in theory. In your network, the ideal setup would be :- Enable NAT on the router, set the WAN interface to DHCP the 82.xx address The router would have 192.168.1.1 on the inside LAN interface PC1 would have 192.168.1.2 PC2 would have 192.168.1.3 Default gateway for the PC's would be 192.168.1.1, assuming the router does DNS forwarding the DNS server for the LAN pc's would be 192.168.1.1 we'll have a look at this and also virgin pc guard later today, many thanks for your time///pete/// Quote Link to comment Share on other sites More sharing options...
taz24 Posted March 22, 2008 Report Share Posted March 22, 2008 One thing I would do and it is a quick fix is. While everything is turned on and all conected, Turn off the router. The pc's will note the disconection, turn on the router and both pc's will communicate with the router and astablish the correct IP address. It worked for me and it may help you. Cheers taz. Quote Link to comment Share on other sites More sharing options...
garyb Posted March 22, 2008 Report Share Posted March 22, 2008 Pin - The NTL' cable modems, are USB & Ethernet client side, so you just need a Dual interface router doing NAT/PAT with DHCP on the outside Quote Link to comment Share on other sites More sharing options...
pin Posted March 22, 2008 Report Share Posted March 22, 2008 Ok ta, well we need to know the make / model of the router (assuming it is a router) before we can help Quote Link to comment Share on other sites More sharing options...
peter-peter Posted March 22, 2008 Author Report Share Posted March 22, 2008 One thing I would do and it is a quick fix is. While everything is turned on and all conected, Turn off the router. The pc's will note the disconection, turn on the router and both pc's will communicate with the router and astablish the correct IP address. It worked for me and it may help you. Cheers taz. thanks taz we tried that yesterday it didn't work. thanks anyway///pete/// Quote Link to comment Share on other sites More sharing options...
pin Posted March 22, 2008 Report Share Posted March 22, 2008 What make / model is the router please? Quote Link to comment Share on other sites More sharing options...
peter-peter Posted March 22, 2008 Author Report Share Posted March 22, 2008 What make / model is the router please? zyxel p-600 series Quote Link to comment Share on other sites More sharing options...
pin Posted March 22, 2008 Report Share Posted March 22, 2008 Which one though, they make a few Quote Link to comment Share on other sites More sharing options...
peter-peter Posted March 22, 2008 Author Report Share Posted March 22, 2008 Which one though, they make a few it says model-660h-d1 does this help Quote Link to comment Share on other sites More sharing options...
pin Posted March 22, 2008 Report Share Posted March 22, 2008 You said cable internet in your first post, that router is an ADSL router, I'm confused now Quote Link to comment Share on other sites More sharing options...
dustyfox Posted March 22, 2008 Report Share Posted March 22, 2008 just email your service provider im sure they will send out someone to do it for you, or they may have a step by step guide on their website. Quote Link to comment Share on other sites More sharing options...
peter-peter Posted March 22, 2008 Author Report Share Posted March 22, 2008 (edited) You said cable internet in your first post, that router is an ADSL router, I'm confused now sorry pin the router provided by virgin media is model no:EO8C007 IVE GOT MISELF CONFUSED NOW Edited March 22, 2008 by peter-peter Quote Link to comment Share on other sites More sharing options...
dustyfox Posted March 22, 2008 Report Share Posted March 22, 2008 talk in the arms it may be easier Quote Link to comment Share on other sites More sharing options...
pin Posted March 22, 2008 Report Share Posted March 22, 2008 Can you take some pics of your setup, we can help you but until we know what the kit is it's impossible You could have NTL (virgin) provided ASDL broadband, or it could be cable. If it's cable you've got the wrong router, if it really is ADSL it's configurable. What does the kit provider by NTL plug into (phone line / piece of coaxial cable / a set top box) ? Quote Link to comment Share on other sites More sharing options...
peter-peter Posted March 22, 2008 Author Report Share Posted March 22, 2008 Kit is: - Virgin cable modem Supplied by Virgin. Connected to coaxial via an F-type connector, and to the router by ethernet. - Zyxel P-660H series ADSL router Came from when I had an ADSL broadband connection. No connection on ADSL (because there is no phone line involved here) Ethernet port 1 connected to cable modem Ethernet port 2 connected to PC1 Ethernet port 3 connected to PC2, via homeplug-mains-homeplug Thanks for persevering with me. Pete. Quote Link to comment Share on other sites More sharing options...
pin Posted March 22, 2008 Report Share Posted March 22, 2008 (edited) Ah, that explains a great deal. Unfortunately this won't work as you expect, the router can only do the required NAT (network address translation) between the WAN (adsl port) and the LAN (ethernet ports). What is happening here is the router you have is just acting as a hub or switch. It's not doing any routeing, when you turn on PC1 it just connects to the NTL cable modem and gets the address you posted. When you switch the second one on it won't get an address and just sits there doing nothing (actually it will probably DHCP an internal address from the router from your previous ADSL network, which is why you'll be getting the "limited connectivity" message - there is nothing translating the internal to external addresses so whilst the second PC will have an address it's not routeable) You'd need a router, with at least two ethernet interfaces which is capable of being configured to do NAT across those ethernet interfaces. The configuration then could be made as I suggested earlier :- The router will connect to the cable modem and assume the "outside" 82.xx address The PC's will connect to the router and DHCP an internal address (eg 192.168.1.1/2) [ depends on how it's configured ] The PC's will send traffic to the internet via the router which will use NAT to handle sending the traffic towards the internet (and back again) Something like this fella would be the equivalent kit to the router you have now. Edited March 22, 2008 by pin Quote Link to comment Share on other sites More sharing options...
garyb Posted March 22, 2008 Report Share Posted March 22, 2008 I have a Linksys BEFSR41 http://www.linksys.com/servlet/Satellite?p...ename=US/Layout Sitting here doing nothing... It dosent have any Wifi, if you think you could use it it's free if you cover the postage. Quote Link to comment Share on other sites More sharing options...
The Great Cornholio Posted March 22, 2008 Report Share Posted March 22, 2008 8 pm. I've just woke up from a 'too' long afternoon nap. Looks like I've missed it all. Peter, If you don't need wireless I'd take GaryB's offer. Keep you old router though, in case you ever revert to ADSL. Quote Link to comment Share on other sites More sharing options...
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