There
are two operations that can be performed on an IP Address Range: You can Find
and Allocate Available IP Address or Reclaim IP Addresses.
Find
and Allocate Available IP Address
To
find available IP addresses in a range, in the IP ADDRESS SPACE, change the
current view to IP Address Ranges. The Find and Allocate Available IP Addresses
task is available by right-clicking the desired IP address range. Choosing this
operation opens the Find and Allocate Available IP Addresses dialog box. IPAM
will search the range starting with the first unassigned IP address. If the address
range is part of a managed DHCP scope, IPAM ignores all reserved or excluded IP
addresses. The search includes a ping of the address and a DNS PTR query; If
both methods fail to get a response, the address is available. You can then
press the Find Next button to move to the next unassigned IP address.
Once
you have completed the searches, you can allocate one of the addresses that you
found. By default the last address you find is highlighted, you can allocate
that address or select a different address is found. Choose each section to
configure the IP address as needed, the Basic Configurations section is filled
in with the selected IP address and the default values for the mandatory
fields.
If
you configure the DHCP Reservation and DNS Record sections, only the IPAM
database is affected by default. If you want to configure a DHCP reservation
for a managed IP address, complete the DHCP Reservation section and check the
Automatically create DHCP reservation for this IP address check box. To create
DNS records for the selected IP Address, complete the DNS Record section and
check the Automatically create DNS records for this IP address check box.
Reclaim
IP Addresses
When
manually added IP Addresses are no longer in use you need to reclaim them to
make them available for use with other devices. Additionally, the reclaim
operations cleans DHCP reservations and DNS records on managed DNS and DHCP
servers. There are two ways to reclaim IP addresses:
To
reclaim IP addresses in a range, in the IP ADDRESS SPACE, change the current
view to IP Address Ranges. The Reclaim IP Addresses task is available if you
right-click the desired IP address range. If you choose this operation, it
opens the Reclaim IP Addresses dialog box.
The Reclaim IP
Addresses dialog box displays all the utilized IP addresses for the range, the
IP Address State, and additional information such as the Device Name and Device
Type. Once you have determined the IP addresses that you want to reclaim, check
the select check box next to the IP addresses, and click the Reclaim button. By
default, this operation removes the DNS resource records and DHCP reservations
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