Results 1 to 6 of 6
Discuss iPhone stepping on other devices IP addresses after waking up at the General - Hackint0sh.org; Has anyone noticed how when the iphone is idle, it's iphone address becomes available and ...
  1. #1
    Respected Professional Array

    Join Date
    Aug 2007
    Location
    Paris, France
    Posts
    533
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    34

    Default iPhone stepping on other devices IP addresses after waking up

    Has anyone noticed how when the iphone is idle, it's iphone address becomes available and any other device that requests a DHCP address may be allocated this address? The end result being that when the iphone wakes up, the other device that has been allocated its address will complain and lose connectivity (normal behaviour).

    The reason that Apple implemented things this way is obvious -- to save energy. A simple recurring ping of a non charging iPhone will illustrate that after 3-5 hours of responding to your pings, the iphone's battery is empty.



  2. #2
    Senior Professional Array

    Join Date
    Aug 2007
    Posts
    227
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    18

    Default

    Quote Originally Posted by Snowbird View Post
    Has anyone noticed how when the iphone is idle, it's iphone address becomes available and any other device that requests a DHCP address may be allocated this address? The end result being that when the iphone wakes up, the other device that has been allocated its address will complain and lose connectivity (normal behaviour).

    The reason that Apple implemented things this way is obvious -- to save energy. A simple recurring ping of a non charging iPhone will illustrate that after 3-5 hours of responding to your pings, the iphone's battery is empty.
    Nope, it means that the wireless access point's DHCP server you are connecting to to get a lease is configured badly.

    Set DHCP leases to last a week and you wont have this problem.

    I have a small network, so I have my DHCP leases set to expire after 6 months. That way I know which of my devices are likely to have which IP addresses.... I could set it to statically allocate IP addresses via DHCP, but I am too lazy.

    The iphone is configured to switch off WiFi upon suspend for energy saving reasons by default, however some application can override this behaviour, i.e. Mail, or if there is a download happening in Safari, or indeed ApolloIM
    Last edited by MetalRat; 09-14-2007 at 02:29 PM.

  3. #3
    Respected Professional Array

    Join Date
    Aug 2007
    Location
    Paris, France
    Posts
    533
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    34

    Default

    I knew where the problem lies, however if it was only that easy...My DHCP params are not configurable -- they're issued by my triple play provider's black block device.

  4. #4
    Senior Professional Array

    Join Date
    Aug 2007
    Posts
    227
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    18

    Default

    Quote Originally Posted by Snowbird View Post
    I knew where the problem lies, however if it was only that easy...My DHCP params are not configurable -- they're issued by my triple play provider's black block device.
    Yuck

    Nevertheless when the iPhone re-initialises the network interface it should send out a DHCP lease renewal request, it shouldn't just assume its lease is still valid... It might be that the black box has a broken DHCP implementation and is hot honouring its own leases!

  5. #5
    Respected Professional Array

    Join Date
    Aug 2007
    Location
    Paris, France
    Posts
    533
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    34

    Default

    Quote Originally Posted by MetalRat View Post
    Yuck

    Nevertheless when the iPhone re-initialises the network interface it should send out a DHCP lease renewal request, it shouldn't just assume its lease is still valid... It might be that the black box has a broken DHCP implementation and is hot honouring its own leases!
    Like you said, it should, but it doesn't. It assumes that the address is still its own and that the lease has been reserved.


  6. #6
    Newbie Array

    Join Date
    Sep 2007
    Posts
    3
    Post Thanks / Like
    Downloads
    0
    Uploads
    0
    Rep Power
    0

    Default

    i have an airport extreme... any body know how to configure these settings on it??

 

 

Similar Threads

  1. Replies: 3
    Last Post: 06-25-2009, 02:18 AM
  2. Replies: 4
    Last Post: 12-02-2008, 12:32 PM
  3. MacNN: AOL stepping up deal talks with MS, Yahoo
    By hackint0sh in forum Latest Headlines
    Replies: 0
    Last Post: 07-16-2008, 08:10 PM
  4. Waking the iPhone?
    By gw1921 in forum Free Toolchain Software (Cydia App's)
    Replies: 2
    Last Post: 01-10-2008, 02:52 PM
  5. iPhone mysterously waking up...
    By Snowbird in forum General
    Replies: 5
    Last Post: 11-01-2007, 04:05 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin®
Copyright © 2014 vBulletin Solutions, Inc. All rights reserved.
Search Engine Friendly URLs by vBSEO
(c) 2006-2012 Hackint0sh.org
All times are GMT +2. The time now is 05:17 PM.
twitter, follow us!