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What is the best DHCP Lease time?? RRS feed

  • Question

  • Hello All,

    I would like to know, what is the best lease time for DHCP for company which has 10000 users. Is the default one a good one. I know clients will start renewing after 50% of time. Please advise. 


    Thanks

    Tuesday, October 10, 2017 11:42 AM

Answers

  • Hi,

    >>Is the default one a good one

    It's up to you.

    Based on my knowledge, when 50 percent of the lease duration has expired, the DHCP client automatically attempts to renew its lease from the DHCP server which the client obtained the lease. If fails, the DHCP client broadcasts a DHCPDISCOVER packet to update its lease when 87.5 percent of the lease duration expires.

    You can adjust the lease to meet your needs.

    In general, if you are in a large network or have enough IP addresses in the DHCP scope for clients, you can increase the lease duration to reduce network traffic.

    If you have a limited number of IP addresses available, you may need to reduce the lease duration. Although reducing the lease duration creates more DHCP-related network traffic, it increases the rate at which addresses are returned to the available address pool for reassignment.

    More information about Scavenging, please refer to the following links:

    Understanding Aging and Scavenging

    http://technet.microsoft.com/en-us/library/cc771677.aspx

    Don't be afraid of DNS Scavenging. Just be patient.

    http://blogs.technet.com/b/networking/archive/2008/03/19/don-t-be-afraid-of-dns-scavenging-just-be-patient.aspx

    Best regards,

    Frank


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Wednesday, October 11, 2017 3:01 AM

All replies

  • Hi,

    >>Is the default one a good one

    It's up to you.

    Based on my knowledge, when 50 percent of the lease duration has expired, the DHCP client automatically attempts to renew its lease from the DHCP server which the client obtained the lease. If fails, the DHCP client broadcasts a DHCPDISCOVER packet to update its lease when 87.5 percent of the lease duration expires.

    You can adjust the lease to meet your needs.

    In general, if you are in a large network or have enough IP addresses in the DHCP scope for clients, you can increase the lease duration to reduce network traffic.

    If you have a limited number of IP addresses available, you may need to reduce the lease duration. Although reducing the lease duration creates more DHCP-related network traffic, it increases the rate at which addresses are returned to the available address pool for reassignment.

    More information about Scavenging, please refer to the following links:

    Understanding Aging and Scavenging

    http://technet.microsoft.com/en-us/library/cc771677.aspx

    Don't be afraid of DNS Scavenging. Just be patient.

    http://blogs.technet.com/b/networking/archive/2008/03/19/don-t-be-afraid-of-dns-scavenging-just-be-patient.aspx

    Best regards,

    Frank


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Wednesday, October 11, 2017 3:01 AM
  • Hi,
    Just checking in to see if the information provided was helpful. Please let us know if you would like further assistance.

    Best Regards,

    Frank

    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Friday, October 13, 2017 9:16 AM

  • Hi,

    Was your issue resolved? 

    If you resolved it using our solution, please "mark it as answer" to help other community members find the helpful reply quickly.
    If you resolve it using your own solution, please share your experience and solution here. It will be very beneficial for other community members who have similar questions.
    If no, please reply and tell us the current situation in order to provide further help.

    Best Regards,
    Frank

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    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, October 16, 2017 9:49 AM