I have to renew the DHCP lease every 24 hours. Is there a solution so I don't have to renew it?

If the dhcp server is on it should automagically renew the lease.. that is the whole point of dhcp.. otherwise you might as well use statically set IP addresses.

You need to give a bit more info on your whole network..

Is the issue just on wireless.. try plugging the MB in with ethernet.

Open Macintosh HD > Applications > Utilities > AirPort Utility 5.6

Click the Time Capsule and click Manual Setup

Click the Internet icon, then click the DHCP tab

Change the DHCP lease to xxxx Days

Click Update to save settings

Please understand that this is a setting to control the lease time for devices on your "local" network, not control your Internet connection with your service provider.

Or, if you are using Lion 10.7.4.....

Open AirPort Utility 6.0 at the same location as above

Click the Time Capsule icon, then click Edit

Click the Network tab

Adjust DHCP Lease to xxxx Days

Update

initially was the default and it did not automatically renew the lease.

Very strange.

You don't need anything in the IP reservations area unless you want to always assign the same IP address to a certain device. This is rarely needed, and I should have blacked that out in the screenshot.

I don't, but LaPastenague, who is the real expert on all things DHCP, may have something since he repairs, modifies, and re-designs Time Capsules in his "spare" time.

Kibbles1 wrote:

Okay, thanks for the help! Guess at this point there is nothing else to do but wait and see if the DHCP lease is automatically renewed in 12-24 hours. Of course, that is unless you have any other suggestions.

Well maybe more eggs spurt than expert but I have played with their insides more than their outsides.. if you catch my drift.

I would do a few things.. just to help it work..

You still didn't tell us the full network layout.. what broadband band you have.. is it a pure modem.. I am guessing the TC is in fact routing. Does it have to.. could you swap the routing to adsl or cable router and use TC in bridge.. it is often better that way.

If you have another router with wireless on.. perhaps turn it off. You want the least amount of interference as you sort the problem.

Make sure the TC is set to the right country.. it is under advanced wireless in my 5.5 utility.

If you want to try a setting change.

TC must be the main router.. and only router.

And for the iOS devices I do think it worthwhile..

Lock the wireless.. the issue might be wireless has issues findiing the TC not getting dhcp. In fact that would be the more common issue.

In the airport utility.. I would use v5.6 as I don't have Lion anyway.. on the airport-wireles tab.

1. Change the wireless name to short, no spaces, pure alphanumeric. (might not be needed but cannot hurt).

2. Change the wireless name for 5ghz in the wireless advanced page to different to 2.4ghz.. so eg.

TC24ghz name for 2.4ghz.. and TC5ghz for the 5ghz band.

3. Lock wireless to a/n - b/g

4. Lock the channels.. this is especially for the iOS devices which seem to have issues with auto channel swapping.

5. Use WPA2 Personal only for security.. passkey 8-12 pure alphanumeric.

6. Set the dhcp to short value.. 1hour.. Using the TC with often updating IP, as the lease should begin attempting to renew at 30min.. should cause no big increase in traffic.. prevents problems of running out of IP addresses and you will quickly know if there is an issue.

Kibbles1 wrote:

Thanks. I will try your advise. I am only using the TC as my router and have no other routers on my network. I use the TC to gain access to the internet with my MacBook, iPhone and iPad.

What modem / broadband type?

Thanks.. that is pure cable modem.. no issues and they are excellent box.