android dhcp lease time

Could you suggest a way to query the router without using user interface (running in the background). I've got couple of Samsung phones - 1 is Android 4.x, another is 6.x another is latest 7.x neither of these connect to the DHCP. 1) DHCP lease times mean nothing if the computer is connected (RFC2131 is what's pertinent here). Now, a 5 minute DHCP lease time is very short even for a guest network. Think guests with smartphones. Any other device connecting to this network, I can see DHCP lines and lease being issued and they work properly. If you're having this issue, please try this out to confirm the fix works. Sections of the type dhcp specify per interface lease pools and settings for serving DHCP requests. DHCP server lease submenu is used to monitor and manage server's leases. You can also add static leases to issue a specific IP address to a particular client (identified by MAC address) . As long as a client is connected to the network, it can (and will/should) keep requesting (and being granted) the same address before the lease time expires, and the server will keep granting it. When no dhcp server answer, how can I force dhclient to use the static lease from dhclient.conf instead of a previous dhcp lease? DHCP Lease time should not be higher than 24 hrs, rather aiming at the lower timers. Please also run some more debugs and see if those clients always start directly with a DHCP request. And open the page where the DHCP lease info is shown and parse the page for the lease time. DHCP relay: A host or router that listens for client messages being broadcast on that network and then forwards them to a configured server. Sub-menu: /ip dhcp-server lease. Well, the DHCP lease includes the T1 (usually half the time of the lease) and T2 (usually 87.5% percent of the lease time)timers. You can disable a lease pool for a specific interface by specifying the ignore option in the corresponding section. – johntheripp3r Oct 21 '13 at 11:30 @johntheripp3r thanks for your response. 1 Where to look for systemd-networkd device names? When a lease expires, the client has to renew it. The issued leases are showed here as dynamic entries. When the T1 timer is up, the client tries to renew with the same server. A really long lease time of 10 days is potentially going to cause DHCP address pool exhaustion in an environment where a lot of unique devices come and go. Before, you had to either (a) set up a static dhcp lease for your nook in your router (b) use an app like WiFi Static to have your Nook not use dhcp at all. Generally, the DHCP lease it allocated as follows: If it hits the T2 timer, the client tries to renew with any DHCP server via broadcast. Please make sure to remove any static dhcp lease assignments that you've set up for your Nook before chiming in. Maybe OP's environment(s) don't have this risk but it still seems ill-advised to increase the lease time for all devices for the sake of a printer. Typically there is at least one section of this type present in the /etc/config/dhcp file to cover the lan interface. When a lease expires, the client has to renew it. No messages in the /var/log/messages to indicate any errors from DHCP. The current session time-out for the SSID is 10 minutes so I want to advice you to increase the DHCP lease to at least half an hour and see if that helps. Lease: Lease is the length of time for which a DHCP client holds the IP address information. Wi-Fi Analytics and Troubleshooting – With the current default behavior we should not be too worried about randomized MAC addresses for analytics, unless a client is switching SSIDs frequently, in which case it will be more difficult to identify SSID hopping.

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