zyne

Q: DHCP Slow

Guys any reason why the iMac would take 20 seconds to get an IP on boot up never used to be like this.

Ive reset Pram etc, if i login and go into network utility i can see the card get a 169 address first then eventually it get the routers DHCP, I've tried a totally differing network router and its same there

 

Any views ?

Posted on Aug 19, 2016 9:09 AM

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Q: DHCP Slow

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  • by poikkeus1,

    poikkeus1 poikkeus1 Aug 19, 2016 11:06 AM in response to zyne
    Level 4 (1,532 points)
    Wireless
    Aug 19, 2016 11:06 AM in response to zyne

    It's a router issue.

     

    The most common solutions will be to (1) reset the router and (2) fix the configuration of the router.

  • by mattwithcats,

    mattwithcats mattwithcats Aug 19, 2016 11:41 AM in response to zyne
    Level 1 (35 points)
    Desktops
    Aug 19, 2016 11:41 AM in response to zyne

    Probably an IP address conflict.

     

    Change the IP address of the router from 192.168.1.1 to 192.168.5.1...

    THe DHCP range should automatically change to 192.168.5.XXX...

     

    Second, make sure the 2.4 and 5 GHz channels have different SSID names.

  • by zyne,

    zyne zyne Aug 19, 2016 12:27 PM in response to poikkeus1
    Level 1 (9 points)
    Desktops
    Aug 19, 2016 12:27 PM in response to poikkeus1

    NO it's not I've tried 2 differing connections on 2 totally differing models of routers 1 ADSL router 1 cable router, the IMac takes its time to get the ip from either.

     

    if I watch network monitor I can see the IMac get a 169 address first then it gets the proper IP 169 as you know is no address

     

    i just wondered if the latest patch from Apple did something as I see a lot of network patches in it...

  • by zyne,

    zyne zyne Aug 19, 2016 12:28 PM in response to mattwithcats
    Level 1 (9 points)
    Desktops
    Aug 19, 2016 12:28 PM in response to mattwithcats

    i,ll try a new ip range or even set it manually see if it helps....'

    tthanks

  • by zyne,

    zyne zyne Aug 20, 2016 12:25 AM in response to zyne
    Level 1 (9 points)
    Desktops
    Aug 20, 2016 12:25 AM in response to zyne

    Just to give you heads up guys after much testing and messing I decided to re-install OS X, reasons were this was definitely something around the OS that wasn't right, I have a PC next to this on the desk and that was getting IPs fine.

     

    once I restalled it's all ok now, however I've yet to install anything like patches I will monitor the patch manifest from Apple and see if any make differences

    thanks for help