Created By/ Created Date- Person who created this record and the date it was created.

Modified By/ Modified Date- Person who last modified this record and the date of last modification

Actions on Address Spaces

General Notes

Because of database limitations, some care must be taken when modifying address spaces. Unsaved address spaces cannot be split or joined because the results are unpredictable. To save an address space, hit the Save button for the entire Network.

The difference between the new and old network prefixes cannot be greater than 6. That is to prevent operations like spltting a /8 Network into /29 Networks which severely affects performance of the NetDB system.

Note that any actions on address spaces do not affect existing address assignments.

Adding and Configuring Address Spaces

• If adding first address range, type the address space in the box next to the checkbox. To add an additional address range, click on the "Add'l" button. Enter desired number of new address spaces in "Count" field if you want more than one. Type in the address range. The address space should be in w.x.y.z/n format where w.x.y.z is the network address and n is the network prefix.
• Enter a low and high reserve to prevent regular LNAs from assigning addresses at the bottom or top of the address range.
• Assign Groups- only Users in these Groups can assign addresses in this address space
• Click on DHCP Options to assign options to this address space. See DHCP Options for more information.

Deleting Address Spaces

To delete an address space, uncheck the box next to the address space range. Save changes. Address spaces with addresses assigned to nodes cannot be deleted.

Moving Address Spaces

To move an address space,

• Go to the information page of the Network containing the address space.
• Click on "Move address space".
• Select the address space you want to move and what Network you want to move it to.

Splitting Address Spaces

To split an address space, enter the new network prefix and click the "Split/Join" button.

Shrinking Address Spaces

To shrink an address space,

• Enter the new network prefix and click "Split/Join".
• Then remove the part of the address space that you no longer need by unchecking the box next to the address space range.

Expanding Address Spaces

Expanding means making a bigger address space by adding unallocated address ranges to an existing address space. To expand an address space, enter in the new network prefix and click on "Split/Join". For example, if address space 171.64.2.0/24 is too small and 171.64.3.0/24 has not been allocated, one can expand the address space to 171.64.2.0/23.

Joining Address Spaces

Joining means making a bigger address space out of existing address spaces. To join or expand an address space, all the address ranges must exist in one Network record. If the address spaces are distrubuted among several Networks, the address ranges must be moved into the same Network. For example, to join 171.64.20.0/25 and 171.64.20.128/25 into one Network, make sure both address spaces are on the same Network. Then enter "24" into the new network prefix box of either network prefix box and select "Split/Join". The page will return with the new address space. Save changes.

Adding Dynamic DHCP Addresses

Dynamic DHCP addresses are handed out to roaming hosts and can only be added after address spaces are created.

• To add n addresses automatically, simply put n in the Count field. To add a particular address, enter the address in the first box under "Dynamic DHCP addresses".
• Click on Save (saves entire Network) or Verify (which will reserve the addresses and display them) or Add'l (which will allow more dynamic addresses to be added).
• Dynamic DHCP address names are automatically generated from the IP address in this format: "dn<hex of IP address>". For instance, the name of dynamic address 171.64.3.5 would be "dnab400305". Once the address is saved, the name can be changed, but this is not generally recommended.
• Click on Save to save all changes.

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