Static IPs and Lease Times
IAIT does not provide static or fixed IP addresses for any devices in the residence halls. All devices on the Rose-Hulman network are required to use DHCP to obtain an IP address. A network devices must be capable of obtaining an IP address via DHCP. If this is not possible, it is the user's responsibility to make the device operable on a private network.
IAIT defines a static IP address as one that is entered into DNS and is hard coded on the client. A fixed IP address is one which is obtained by DHCP and does not change. A dynamic IP address is one which is obtained by DHCP, but can change.
It is important to understand that dynamic IP addresses, especially in the residence halls, do not change frequently. IAIT has set the lease times for DHCP as follows:
|Classrooms||30 minutes||1 hour||1 hour|
|Labs||1 week||1 week||30 days|
|Offices||1 week||1 week||30 days|
|Printers||1 week||1 week||30 days|
|Residence Halls||1 week||1 week||30 days|
|Wireless||1 hour||9 hours||9 hours|
For example, a device in the residence halls will keep the same IP for at least one month. If the device is on frequently or all the time, it will be able to renew its IP address and keep that IP address indefinitely.
IAIT actively monitors the network for user assigned IP addresses. Action will be taken if a user if found to have appropriated an IP. Additionally, all machines must be registered to be on the network, even if they use a private IP address. Failure to comply will result in action from IAIT.