Guidelines for the use of Private IP Space (RFC 1918 space) at UIUC

Definition:

Private IP space is RFC 1918 compliant IP addresses that can be used by anyone, but may not be routed on the Internet. (IP addresses in this range cannot be properly resolved from off campus.) There are 3 address ranges allocated by RFC 1918: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16.

Conventions:

Departments wishing to use Private IP space on the UIUC campus are requested to follow these conventions:

• For traffic that you want to use in your unit, that will never be leaving your unit's network, use any part of the 192.168.0.0/16 address space. There is no need to let CITES know what part of this you are using. CITES will not host these addresses in a campus DNS server, or route this IP space to campus.


• For traffic that you might want to be routed to other parts of the UIUC campus, or would like to have registered in a campus DNS server in the future (this service is currently limited availability), request an IP range through the Network Design Office (NDO). You will be assigned an IP range on a subset of the 172.16.0.0/12 address space.


• CITES reserves the 10.0.0.0/8 IP space for future projects, please do not use it in your department.

Notes regarding setting up and using the Private IP space:

192.168.0.0/16	It is entirely up to your unit to set up anything needed to use the 192.168.0.0/16 IP space. Routing between this IP space and your campus assigned IP space still falls under the regular guidelines (ie. you can't without prior approval). CITES will not create separate VLANS in CITES-run switches to route this traffic in your building or around campus, although you can do so if your unit controls the switches in your building. CITES will not help you set up your IP space or DNS services for a net in this IP space.
172.16.0.0/12	CITES is willing (if your unit would like) to route this IP space to campus (including to your unit's other subnets). CITES will create a separate VLAN for your IP space in this range in CITES-run switches. This VLAN can be configured in multiple buildings, just like other campus VLANs. As with any other network, your unit can not route between it and other subnets (including your own) without prior approval.
10.0.0.0/8	Your unit is requested not to use this space, as there may be campus-wide projects in the future that use this space.