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Home > Success Center > IP Address Manager (IPAM) > IPAM Getting Started Guide > Reserve an IP address in a DHCP scope

Reserve an IP address in a DHCP scope

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Updated: June 1, 2017

A DHCP scope is a predefined range of IP addresses that the DHCP server assigns to users on a subnet. If you have a scope that has exceeded its IP address allocation, there are no more IP addresses available and devices on subnets with DHCP do not receive an IP address. Reserve IP addresses on a DHCP scope to ensure a device receives the same IP address every time your servers reboot.

This example reserves an IP address in scope EAST0300: External Access.

  1. Click My Dashboards > DHCP & DNS Management.
  2. Review the %IPs Used column to locate a scope that is close to exceeding its IP address allocation.

    Scope EAST0300: External Access has 50 percent of its IPs used.


  3. Click a scope to view its IP address details.
  4. Select an IP Address that you want to reserve.


  5. Click Set Status > Reserved.


  6. In the DHCP Server Reservation box, select how you want to assign IP addresses.
  7. Click Send Reservation to DHCP Server.

    If you select Make Reservation In IPAM Only, you need to also make the status change on the DHCP server.


The IP address is reserved.


When you remove a server, be sure to also change the Reserved status to Available to free the IP address for active devices.

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