DHCP Lease TIme || DHCP Renew And Rebind || T1 & T2 || DHCP 4

This content explains the concept of DHCP leases and explains how it affects the duration that a client can use an IP address.
The DHCP lease renewal timer controls lease renewal. The default value is 50% of the lease, i.e half of the lease expiration time. After this period, a DHCP client will enter a RENEWING state where it will contact the server that allocated its configuration information by sending a DHCP request message in unicast mode.
DHCP lease rebinding timer controls lease rebinding. The default value is 87.5% of the lease, i.e, after the first half of the last quarter of the lease expiration time. This timer expires when a DHCP client does not receive any response from a DHCP server after sending multiple DHCP request messages for its lease extension.
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[@joshuaemmanuelaudu4799]

Great insights

[@Physical_Logik]

Thank you for your feedback.

[@jeanchery7246]

Thanks and great teaching

[@Physical_Logik]

Thanks Jean Chery. We appreciate the feedback.

[@vladislavkaras491]

Quick and informative!
Really well done!
I have question about Rebinding state:
In the Request packet, do we ask for renewal of the existing lease?
If so, how would other DHCP servers with different IP pools react? Simple ignore the packets? Or would they send the new IP?
Thanks for the video!

[@Physical_Logik]

In the rebinding state, the. DHCP client begins to broadcast DHCP packets in order to extend its lease as the initial unicast message to the server did not get a response.
Also, the RFC for DHCP clearly states that "The client MUST NOT include a 'server identifier' in the DHCPREQUEST message." both in the renewing state and rebinding state. As long as the server responds with the requested IP address by the client and the 'xid' field in the DHCPACK message is the same as in the DHCP REQUEST message, the client will continue forwarding traffic normally and enter the binding state.

[@ShaliniSingh-zz2rm]

Can somebody tell me if dhcp server is not leasing ip address in sequence for few of the scopes…what is wrong with that?
How to set it up so that it can release the ip in sequence. There is no reservation created for any ip in that scope. Thank you in advance