DNS Cache issue 10.11

Discussion in 'OS X El Capitan (10.11)' started by ^squirrel^, Jul 11, 2016.

  1. ^squirrel^ macrumors 6502a


    Apr 4, 2006
    Hi all,

    Since we moved office out of about 25 macs i have around a handful that appear to have DNS problems over Ethernet.

    All macs are running 10.11.

    I've run the following commands to try and clear the DNS Cache.

    sudo killall -HUP mDNSResponder
    sudo dscacheutil -flushcache

    I noticed that the DHCP takes an awful long time (1 min) when connected via ethernet to get an IP address. When i plug my laptop in it gets an address straight away, so i know it's not a network problem.

    For now to get around the issue i've moved these problem machines to Wifi which work faultless.

    Any help would be of great help.

    Many thanks

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