question: conflicting dhcp range

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Level 1

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question: conflicting dhcp range

Hi out there

Am after a basic language easy to follow instrution to resolve the above

I have a TC as my main wifi router, with an extreme and express as part of the network. I have the above message on my TC, and I have absolutely no idea how to resolve. So, i am after someone who can explain how to fix this, and please do so as if I am the dumbest person out ther, I do not understand any of this DCHP/NAT/PPoPe stuff, all it says to me is "blah, blah blah blah!"

Ihave attached to my TC via ethernt - Mac Mini, Denon AVR, and apple TV. And wireless I have an Asus PC touch screen as a media server.

Am trying to set up so I can airplay wirelss with iphone 3gs, and 4g, plus retina ipads.

All help greatly appreciated!

Macbook, Mac OS X (10.4.10), Ipod's

Posted on May 16, 2013 7:18 AM

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Answer 1

Bob Timmons

Level 10

185,024 points

May 16, 2013 11:01 AM in response to zeusta

We need to know the make and model number of your modem, please.

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Answer 2

May 16, 2013 1:05 PM in response to zeusta

The only way you can have this problem is with the main router also being the modem, and trying to use the TC as a second router.. and they both happen to have the same IP addresses.

I think you are better just bridging the TC. The BTMM should still work ok.

You also need to explain how the Extreme and Express are connected.. I am guessing by wireless extend. But you need to supply that info along with the modem.

Setting in bridge is easy.

Setting up the rest of the network may take a bit more.

Are you also using wireless from the main modem/router?

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Answer 3

zeusta Author

Level 1

0 points

May 16, 2013 10:05 PM in response to zeusta

Like I say, I am dumb when it comes to this stuff... But hope this will help:

TC/Extreme/Express all connected via ethernet points in different parts of the house, loung/kitchen/bedromm repectively.

the house is fibre optic, and the hub is in a cupboard downstairs, if that is the router it is an ericsson modem, as to name, the box it come in is very non-discript (supplied by telco - DU in Dubai), but if any of this helps:

Product No - KDU 137 609/14

Serial no -TT10275643

Ethernetr MAC address 000631BB4C4

TC is intended as the main, and the extreme and express as the extensions.

thanks so far

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Answer 4

May 17, 2013 3:21 AM in response to zeusta

The extreme and express must be in bridge mode.. so they will get an IP from the TC.. otherwise they will indeed confilct because by default they all have the same IP address.

So you have modem---TC (main router)---Express (bridged)

---Extreme (bridged)

It is in my estimation much easier to set these things up in isolation but Bob can show you how to automate the process.

For example see his post here.

https://discussions.apple.com/thread/5040666?answerId=22030217022#22030217022

I just put each one on a cmputer.. open the airport utility and select bridge.

Then you plug it into the network..

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Answer 5

zeusta Author

Level 1

0 points

May 18, 2013 1:37 AM in response to LaPastenague

OK, still having difficulty getting my head around this and what you are asking/saying.

We have Cat5 throughout the house, and a ericsoon router/modem i n the cupboard which I guess connext the house to the outside world.

In the main TV?entertainment room I have a Mac Mini connected to TV. The TC is in this room connected via ehernet to the mian hub via a wall socket/port. I have the extreme basically in line of sight in the kitcehn also connected via ethernet cable to the wall, basically using this as and extension. Then upstairs in master bed is the express, also connected via ethernet to the wall.

When I bring up airport utiliity they are shown: TC - Extreme (aprox 5 or 6 years old) - Express from top down. The later 2 are in bridge, seem to have got there automatically, and they have the steady green light, the TC has the flashing amber and is giving me the DCHP message. I have tried putting it in bridge also, this then gives me a signal but the inetrnet hangs, ie pages time out rather than load. So I reset back to DCHP and NAT and other than the amber light all works fine, except I can't seem to find my Denon AVR which is connected to the TC via one of the ethernet ports, as is my apple TV (which seems to be ok).

I thought this would be easy, apple on their website makes it sound as such yet it is not!

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Answer 6

May 18, 2013 2:29 AM in response to zeusta

No complex network is easy .. sorry but the easy is a modem wireless router and every item connected to it.. then it is easy.. as soon as you have multiple items.. it gets hard.

First question is, if you don't have the skills to do this get in a Tech.. think of it as the washing machine on the blink.. if you have that happen most people do NOT start stripping down the washing machine.. they call a tech.

Same here. Networking is something that people do a couple of years in school for a diploma level.

If you want to DIY..

The first step is to write down the IP of every single item..

So start with the Ericson modem router. What is its IP and dhcp set to?

Please list that.

Please remove everything from the network except the TC and modem.. and any switches.. they are fine.

Put the TC back into bridge modem.. and ensure it gets an IP from the Ericson.. if not restart the Ericson and the switch and the TC.. make sure it gets an IP and you can ping it.

List the IP of the TC.. make sure in the Ericson it is listed correctly.

Also note.. items have issues with Apple names.. please name all your apple devices to SMB standards.. short, no spaces and pure alphanumeric.

No luck.. wire the TC direct to the Ericson.

No switch.. nothing else but a computer wired to the TC to see what is happening.

So you have

Modem--ethernet--TC in bridge--ethernet--computer.

Note down again the IP of everything.

use the tools in the computer.. ping and traceroute to make sure you have local and internet access.

Always..

Reduce complexity of the network, until it works.. then add items. one by one.. ensure every part works as it is added. If a part doesn't work.. reset it and try again.. do the setup in isolation from the network.

Or call a tech.. and think of it as a washing machine.

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