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Modem taking forever to "accept" router

post #1 of 14
Thread Starter 
Ok someone with network knowledge explain this to me: How come everytime it seems like you put in a new router, you have to unplug/replug the modem/router like a million times before it randomly just "accepts" the router and actually lets you connect to the internet.

Like I got a new router today, replaced my old one.....Modem took like seriously 500 reboots to finally give an IP to my router and let it start using the internet (and allow wireless users to get internet too)

Is this because The Modem sends a specific IP to a Specific router and it remembers that? So when I replace the Router it's still trying to send that IP to the old one? if so how do you alleviate this? Reset the modem?
post #2 of 14
That shouldn't happen. It would be helpful if you described the modem you have; is it a combo modem/router, is it also responsible for your telephone hookup, what isp you have and did they give you the modem?
    
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post #3 of 14
its known for some cable modems to do that

they will only assign one mac address an ip at a time
unplug it for about 5 minutes, when swapping devices
post #4 of 14
Quote:
Originally Posted by Mercfh View Post
Is this because The Modem sends a specific IP to a Specific router and it remembers that? So when I replace the Router it's still trying to send that IP to the old one? if so how do you alleviate this? Reset the modem?
Yes some cable companies work like this. They assign one IP address to one the MAC address associated with the device connected to the modem. To make your "router switching process" faster, change the MAC address on both routers to the same one. This is usually called the "Clone MAC" function on most linksys routers.
post #5 of 14
Use MAC cloning for the device that was previously directly connected to your modem. DHCP server from your ISP should then renew the allocation to your router and will be in business.

Some ISP's have a greater DHCP timeout than others.
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post #6 of 14
You could just assign a static IP on the new router that is the same IP as your previous router.
post #7 of 14
Thread Starter 
Btw it's a Modem--->Router combo, it's DSL through bellsouth.

So if Im wanting to put a new router? keep the modem unplugged for like 5 minutes?

so for the clone mac thing......how exactly do I do that?
post #8 of 14
most routers have a setup page
192.168.0.1 or 192.168.1.1

log in and find the wan setup page, it should have an option to clone the mac of the pc connected to it
post #9 of 14
Thread Starter 
On the new router or old one?

and it's ok to do this if I have 2 other wireless computers connected to the router right (along with 1 wired)
post #10 of 14
Can you explain exactly what hardware you have, and how you're trying to connect it all together? Include all brand names and model numbers for everything.
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