pope1957
Level 1 (4 points)
Wireless

Q: Airport Connection Issues

I have an Airport Extreme connected to a Comcast Modem. I have extended my system with an Airport Express and Airport Time Capsule. I am using a DHCP/Nat configuration of 192.168.1.## for the system and each of the add-on units is set to EXTEND the current system. When I use DHCP to obtain the IP address, the units default to a 172.addressing scheme. In order to obtain a correct 192 address, I need to manually insert the ip address, subtask and DNS servers. Why is creating the incorrect IPv4 addressing scheme to show up?

Posted on Jun 16, 2016 11:29 AM

by pope1957,Solvedanswer
pope1957 pope1957
Level 1 (4 points)
Wireless
A:

Well I think I have finally found out what is going on. We have Comcast security also, which has its own router. I tapped into this unit and uncovered that it was using a 192 address distributed by my Apple Extreme and it had was hosting a private network on the same range that was hidden. When I defaulted the unit, of course knocking out the security system, the private range defaults to the 10.0.xx range. So setting the system up with the 172.16 settled things. Thanks for all of your assistance in this matter

Posted on Jun 19, 2016 4:07 PM

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pope1957

Q: Airport Connection Issues

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  • by Tesserax,

    Tesserax Tesserax Jun 16, 2016 12:57 PM in response to pope1957
    Level 9 (54,398 points)
    Wireless
    Jun 16, 2016 12:57 PM in response to pope1957

    What is the make & model of your Comcast-provided modem? How about the exact model numbers of each of your Apple base stations? Are both extending base stations using a wired or wireless connection to extend the AirPort Extreme?

  • by pope1957,

    pope1957 pope1957 Jun 16, 2016 1:24 PM in response to Tesserax
    Level 1 (4 points)
    Wireless
    Jun 16, 2016 1:24 PM in response to Tesserax

    I have a UBee Cable Modem, Airport Extreme, Firmware 7.7.7 wired to comcast.

    Airport Express via wireless, 2nd Generation, 7.67. Firmware

    Airport Time Capsule via wireless, 7.7.7 Firmware

     

     

    Wireless connections to the Airport Extreme.

  • by Tesserax,

    Tesserax Tesserax Jun 17, 2016 8:41 AM in response to pope1957
    Level 9 (54,398 points)
    Wireless
    Jun 17, 2016 8:41 AM in response to pope1957

    I have a UBee Cable Modem

    It would be helpful to get the model number for your UBee modem. I just want to rule out that this device is not a combination modem & router to help with your networking issue.

     

    If your "main" base station is configured to provide IP addresses, via DHCP, in the 192.168.x.x range then the extending base stations should also be assigned an address in this range. Something else is providing DHCP service in the 172.x.x.x range and that is what I am trying to help you find out,

  • by pope1957,

    pope1957 pope1957 Jun 17, 2016 8:57 AM in response to Tesserax
    Level 1 (4 points)
    Wireless
    Jun 17, 2016 8:57 AM in response to Tesserax

    First, thank you very much for the assistance and I apologize for dribbling the info. I was at work and could not get access. Another of my issues. The modem is a UBEE DM3513 Data Modem. I spent the morning looking up this device and gaining access. Not much I can control here. AS for the Airport items, each of the devices connected to the Extreme always seem to default to a 172 address, especially the iPhones. Our phones migrate from home IP address to whatever we connect outside of house. Most likely the XFINITY addresses. Once I get home, it will jump the house system. It picks the standard ID or the 5MHZ SSID and then a 172 address. If I go to each device card and set up to connect to Extreme with DHCP, it will default to 172. I have to hit renew IP several times, then it jumps to the 192 segment. Hope this help explain things a bit more.

  • by Tesserax,

    Tesserax Tesserax Jun 17, 2016 9:16 AM in response to pope1957
    Level 9 (54,398 points)
    Wireless
    Jun 17, 2016 9:16 AM in response to pope1957

    Thanks for providing the additional Ubee information. I just wanted to be sure that it was a simple modem.

     

    I would suggest that we review your network configuration and we may need to start over to make sure it is what will meet your networking goals.

     

    I suggest that we temporarily remove the extending base stations so that you only have the Ubee modem and the AirPort Extreme base station powered-on.

     

    The Ethernet cable coming from the Ubee must be connected to the WAN (circle-of-dots) port on the Extreme. The following are the basic settings for the Extreme:

    • Internet tab > Connect Using: DHCP
    • Wireless tab > Network Mode: Create a wireless network
    • Network tab > Router Mode: DHCP & NAT
    • Network tab > Network Options... > IPv4 DHCP Range: 192.168.1.2 to 200 > Save

     

    With these settings can both wired and wireless DHCP clients connected to the Extreme get the proper IP addresses and gain access to the network/Internet? If so, we can then start adding back the other base stations.

  • by pope1957,

    pope1957 pope1957 Jun 17, 2016 9:23 AM in response to Tesserax
    Level 1 (4 points)
    Wireless
    Jun 17, 2016 9:23 AM in response to Tesserax

    Thanks. I am currently not at home. I will not be able to this until around 6PM EST. I can access via web all three units, but I am not sure I can test the IP connections that would make it a valid test. I will check in later if that works for you.

  • by pope1957,

    pope1957 pope1957 Jun 17, 2016 3:44 PM in response to pope1957
    Level 1 (4 points)
    Wireless
    Jun 17, 2016 3:44 PM in response to pope1957

    OK, I disabled the other units, set the extreme back to default to start over. Create a new network using the above parameters. I also created a 5GHZ channel which seems to be one of the problem areas. I connected to the 2GHZ but when I picked the 5GHZ the unit defaulted to 169 address. I cannot connect to this service on the iphone, will not accept the password. The desktop seems to connect to the higher address fine now. Other desktops connect properly

  • by Tesserax,

    Tesserax Tesserax Jun 17, 2016 4:12 PM in response to pope1957
    Level 9 (54,398 points)
    Wireless
    Jun 17, 2016 4:12 PM in response to pope1957

    Ok, let's not get ahead of ourselves.

     

    Please do a "factory default" reset the Extreme to get it back to its "out-of-the-box" configuration. Do not make any other changes at this time. It should be performing as a wireless router that will be broadcasting an unsecured simultaneous dual-band Wi-Fi network with a network name of something like: Apple Network NNNNNN

     

    Can all of your network clients connect to this network in this configuration?

     

    If so, then go ahead and change only the base station name, network name, and employ Wi-Fi security. Do not make any other changes, again at this point.

     

    Can all of your network clients connect to this network?

     

    Please post back your results.

  • by pope1957,

    pope1957 pope1957 Jun 17, 2016 5:50 PM in response to Tesserax
    Level 1 (4 points)
    Wireless
    Jun 17, 2016 5:50 PM in response to Tesserax

    Ok, started over and established a network per instructions above. All devices connected quickly without error.

  • by Tesserax,

    Tesserax Tesserax Jun 17, 2016 6:28 PM in response to pope1957
    Level 9 (54,398 points)
    Wireless
    Jun 17, 2016 6:28 PM in response to pope1957

    Excellent! Thanks for hanging in there for me.

     

    Ok, let's try adding back one of the extending base stations. Again, leave the AirPort Extreme configured as is.

     

    Let's start with the TC. We will be doing basically the same steps for the Express.

     

    • First, perform a "factory default" reset on the TC. This type of reset will NOT affect any data stored on the TC's internal drive.
    • Second, bring the TC into the same room as the Extreme. We will move it to the desired location a bit later.
    • Next, use the AirPort Utility to configure the TC to extend the Extreme's Wi-Fi network. I suggest that you just use the utility's automated setup for this.
    • When the setup has completed and the TC restarts, verify that network clients can connect to either base station and gain network/Internet access. (Note: You can tell which base station your are connected to by checking the BSSID value in the AirPort menu in OS X.)
    • If everything went well, go ahead and set up the Express.
    • If this is successful as well, go ahead and move each extending base station to the desired location.

  • by pope1957,

    pope1957 pope1957 Jun 18, 2016 4:31 AM in response to Tesserax
    Level 1 (4 points)
    Wireless
    Jun 18, 2016 4:31 AM in response to Tesserax

    Sorry for the delay, forgot how much stuff was connected to system, alarm, thermostats. Difficult evening getting most back on the system. Here is where I am now. As I added each Airport device, each unit defaulted to 176.16 range. If I renewed IP address several times, it jumps to the 192.168. Same with the phones. We changed the network scheme to 172.16 and it jumps to 172.12. I purchased a TP-LINK Modem, model TC-7620 yesterday thinking it might be the modem, and the condition are the same. Any suggestions on the next test?

  • by Tesserax,

    Tesserax Tesserax Jun 18, 2016 9:20 AM in response to pope1957
    Level 9 (54,398 points)
    Wireless
    Jun 18, 2016 9:20 AM in response to pope1957

    If when adding the TC to extend the Extreme the TC got an 172.16 address then there is either something wrong with the Extreme's DHCP service or there is another device on the network that is providing this service.

     

    If you are sure there is no other device, like a server, on your network, then I would suggest at this point to substitute the TC for the Extreme, and then, start from the beginning again. Be sure to do a factory default reset on the base stations.

     

    So, you would now have the TC connected to the modem, verify that you can get Internet access with it. This time do NOT change the DHCP range from the default 10.0.x.x range on the TC.

     

    Then try setting up the Extreme to extend the TC. Does the Extreme still get an 172.16 address or a 10.0.x.x one?

  • by pope1957,Solvedanswer

    pope1957 pope1957 Jun 19, 2016 4:07 PM in response to Tesserax
    Level 1 (4 points)
    Wireless
    Jun 19, 2016 4:07 PM in response to Tesserax

    Well I think I have finally found out what is going on. We have Comcast security also, which has its own router. I tapped into this unit and uncovered that it was using a 192 address distributed by my Apple Extreme and it had was hosting a private network on the same range that was hidden. When I defaulted the unit, of course knocking out the security system, the private range defaults to the 10.0.xx range. So setting the system up with the 172.16 settled things. Thanks for all of your assistance in this matter

  • by Tesserax,

    Tesserax Tesserax Jun 20, 2016 9:26 AM in response to pope1957
    Level 9 (54,398 points)
    Wireless
    Jun 20, 2016 9:26 AM in response to pope1957

    You're very welcome! I'm glad you got it worked out ...

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