Get a New IP Address on iPhone or iPad by Renewing DHCP Lease

Jan 11, 2013 - 5 Comments

Renew a DHCP lease in iOS

If you need to get a new IP address from a router that any iPhone, iPad, or other iOS device is connected to, you can either set a manual IP address or, what’s likely more relevant to most people, you’ll want to renew the DHCP lease directly from the wi-fi router itself. Renewing the lease this way should alleviate any potential conflicts with other devices on the network, and it also fills in everything from subnet mask, router, DNS settings, in addition to the new IP. Here’s how to do this in iOS:

  • Open Settings and choose “Wi-Fi”
  • Find the wireless network the device is connected to and tap on the (>) blue arrow – not the name of the router
  • Under the DHCP tab (the default), scroll down to reveal “Renew Lease” and tap on it, confirm to renew the lease when asked
  • All network fields will clear out and go blank for a moment, then refill with a new IP address and the other standard DHCP networking info
  • Close out of Settings

Renew a DHCP lease and get a new IP address in iOS

Typically people need new IP addresses to get around network conflicts with other devices on the same network, though most modern wi-fi routers are much better at handing out IP’s and theoretically should never assign the same address to multiple devices. Nevertheless, it does happen from time to time even with the newest hardware and newest routers, especially if there is a lot of activity on a network. For those who repeatedly encounter the conflicts, assigning a manual address higher in the IP range than what is typically assigned can resolve that problem completely as well, you’ll probably want to check the current IP before taking a wild guess though.

Renewing a DHCP lease is also standard protocol for troubleshooting a lot of network connection issues with routers and even broadband service providers, but don’t be surprised if you’re on the tech support line with a big cable or DSL provider and the only thing they know how to troubleshoot is a Windows device. Fortunately, DHCP is extremely easy to manage in iOS and after you do this once it should be easy to memorize.

As usual, this same process applies to all iOS devices, including the iPad and iPod touch as well, even though the screenshots are from an iPhone.

(Note: this is not the same as getting a new WAN IP address for a cellular device)

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Posted by: Paul Horowitz in iPad, iPhone, Tips & Tricks

5 Comments

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  1. Cameron wall says:

    My mac and ipad and iPhone ere constantly conflicting with their ip addresses, but I didn’t get the message telling me this. Finally I discovered it myself, after months of waiting and intrigue. Instead of doing this everytime I just increased the range of ip addresses in my server. Though, if you were on a public network and couldn’t change their ip settings, this is a great troubleshoot. However, apple always says dont do this, just go to general, reset, network settings, reset : does the same job and if it is a different problem then it troubleshoots that, this only works with ip addresses.

  2. Most all DHCP implementations will hand out the same IP address every time you renew the lease (and a lot of clients will actually go so far as to request the same IP address) to minimize the churn in what is typically a busy, full pool

  3. lukeall says:

    I agree with Paul. Most DHCP servers provide “pseudo-static” addressing. You’re likely to get the same address. The server will probably even “tombstone” your address for a period so you can have the same one back.

  4. Nate says:

    I agree with the other commenters. According to the spec you should always get he same IP because your client will request the same IP as it has. As long as you haven’t changed networks or your DHCP lease hasn’t expired AND the server has already given it to another client, your IP shouldn’t change. Also, as long as you stay on the same wifi network ou should keep he same IP as the client will continually renew its DHCP itself when it’s lease time is half way up.

  5. Rae says:

    Will renewing the lease affect other areas of the phone? Like will it for instance delete photos or reset any other settings? Also I apparently have an IP address starting with 169.254. which is, apparently, not good. I’ve had the same phone for 2 years now and it’s just started giving me trouble the night before last. I have no idea where it’s come from; I’ve never touched any of the IP stings before and it’s quite frustrating. Thanks for the tip

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