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Internet, Networking, and Wireless Discussion of networking, internet, and wireless including Apple's Airport products.

airport extreme connection problems - ip not recognized

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Member Since: Jan 03, 2010
Posts: 3
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I am trying to replace my Linksys wireless router with an airport extreme base station but am not having any luck in setting it up.

I followed all directions, but at the end of the setup, I can't get any internet connection because the "ip address is not recognized."

I have a COMCAST DSL modem that uses DHCP to assign ip addresses. I've tried resetting the COMCAST modem then turning the AEBS, but still no luck.

Any help would be appreciated.
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Collin Bl

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Member Since: Apr 07, 2009
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Have you got the Extreme set to bridge mode like this;

Click for full size
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Member Since: Sep 23, 2006
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I have my Macs running on an Airport Extreme. Here are my Airport tab settings in System Preferences, Network:

Airport - Remember networks checked
TCP/IP - Configure IPv4 Using DHCP, Configure IPv6 Automatically
DNS -,
WINS - (no settings)
802.1X - (no settings)
Proxies - Web Proxy checked, Use Passive FTP Mode checked
Ethernet - Configure Automatically, MTU Standard (1500)

Hope that helps.
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Member Since: Jan 03, 2010
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I'll try it; thanks.
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Member Since: Jan 03, 2010
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Okay, I've tried doing the suggested fixes posted above, but to no avail. At one point, I had a green light on my AEBS, but still no internet access. I then changed one setting (I think it was for the IPv6 mode, but can't remember) then the light turned yellow again, and I haven't been able to get it back to green.

I spoke to a family member (who is a COMCAST guy) but it was over the phone and he really couldn't help me. He did say that I do not need to put in any DNS server addresses, or a router address, that the COMCAST modem will do this automatically.

I finally unplugged my AEBS and put back my old LinkSys router.

Here are the settings I currently have for the AEBS. I don't know what I'm doing wrong. Can anyone help? Settings are:

Internet Connection:
Connect using: Ethernet
Connection Sharing: Off (Bridge Mode)
Configure IPv4 using DHCP
IP Address: (IP address pushed by the modem:
Subnet mask:
Router Address: blank
DNS Servers: blank
Domain Name: blank
DCHP Client ID: blank

IPv6 Mode: Router
Block incoming IPv6 connections: Checked
Configure IPv6: Automatically
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