Network has gone crazy - looking for assistance

[myf360f1]

Hi all,

I finally got some data points installed in my house today but after the initial testing now everything has gone crazy. My network looks like this:
- My Pc connects straight to the router
- PC 2 connects through the ethernet port to the router
- PC 3 connects through the ethernet port to the router
- Entertainment area has an unmanaged switch with 3 devices connected

The problem I am having is my PC and number 2 connect then after a period of time they loose connectivity. PC3 tries to connect and its says identifying network then it falls over and it just cycles like that. I saw an earlier message about an IP conflict so I have set my PC and and PC2 and 3 with statc IPs this has not helped any thoughts would be appreciated.

[DB44]

I'm not sure of what experience you have and am guessing at your equipment, so let's go right back to basics. I will presume the router is also providing internet via nat and its internal ip address is 192.168.0.1. This being the case you can then set up your router to provide internal ip address via dhcp to the internal network (and each machine to obtain an ip address via dhcp). If you want to assign static ip addresses to the machines in your network they will need to be distinct addresses in that subnet. For instance, yourpc might be set to: ip address: 192.168.0.2, subnet mask 255.255.255.0, gateway 192.168.0.1, nameserver (set either to router (if supported), to isp's nameserver, or to unblock-us, uno-dns etc). Then check you can ping between machines, ping router etc.

[myf360f1]

Hi Db,

Router is linksys WRT54GL

Ip addresses are mine 192.168.1.10
second Pc is 192.168.1.40
third PC is 192.168.1.50
Router is 192.168 .1.1
Subnet is 255.255.255.0 for all three
Gateway is 192.168.1.1 for all three
DNS on mine is unotV TV and on the others is googles free DNS

The moment I connect the three ethernet cables into the router I loose connectivity, my pc connects directly to the router unlike the other three units

[fromaron]

Do you want to try small step at a time. Configure all three PCs DNS to 192.168.1.1 and see how you go.
Also, check the router DHCP IP range and make sure your static IPs don't clash with the DHCP range.

[myf360f1]

Hi fromaron,

Set all three DNS to 192.168.1.1 are you sure ?
DHCP range starts at 192.168.1.100

BTW the router also has UnoTV dns setting installed

Thxs

[fromaron]

Hi fromaron,

Set all three DNS to 192.168.1.1 are you sure ?
DHCP range starts at 192.168.1.100

Thxs

I assume your modem has your ISP DNS address setup so by setting up your PCs to the router allows router to service DNS to all PCs.
I suggested that anyway just to simplify your setup so it is easier to find the problem.

[myf360f1]

Ok where would I find the ISP's DNS settings ? I have had a look around and cant see any,

[fromaron]

Don't worry about your ISP DNS address, it is in the modem settings. Your router DNS is fine, all your PCs with 192.168.1.1 as DNS will use the router DNS.
BTW which modem are you using? Is it in Bridge mode?

[myf360f1]

Standard optus supplied surfboard modem no not in bridge mode.

Sorry guys going AFK , curfew has hit.

Thank you for the input will carry on in the morning

[fromaron]

Standard optus supplied surfboard modem no not in bridge mode.

Sorry guys going AFK , curfew has hit.

Thank you for the input will carry on in the morning

Can you do this thing in the morning:
1. Power off your Optus Modem. Disconnect the power cable.
2. Make sure your router is powered on with all PCs connected.
3. Wait for 1 minute and plug the modem cable back. Power on the modem.
4. Wait until it synchronises itself.
5. Test your PCs.

[myf360f1]

Hi fromaron,

did that twice last night, no change.

Was advised by another member to reset the router completely, which i have done this morning. The PC at the furthest point had an initial problem same as before with it connecting then dropping out, and cycling like that, but it has now stabilised and have all PC operational and the WDTV also up and running. I am still suspicious about my router but will monitor it closely today and see what it does, coincidentially I am also changing ISP's and they will supply a new router otherwise I would be done at MSy this morning sourcing a replacement.

Thank you all for your assistance as it was very frantic yesterday with everything not working and between the kids and the missus the pressure was on

[myf360f1]

Ok so after more testing today I called back the cable installers who tested each point and guess what.... one cable was not punched down correctly on the connector.....problem fixed. Installers were amazed as they had tested them but somehow this one fell through.

[Seymour Butts]

Glad to hear the problem is sorted mate

[leecam]

This will crash packets on an unmanaged switch and cause confusion for other ports. Naughty Boy he should have checked for you. saves a lot of heartache.