Standards Review and Recommendation Publication
SRRPUB03 – IP Address Assignment
Revised August 28, 2002 Version 2.5
The Department of Information Resources (DIR) issues Standards Review and Recommendations Publications (SRRPUB) as guidelines for Texas state agencies and institutions of higher education.
As State agencies implement networks using the TCP/IP protocol suite they must apply for IP network number groups. The way that these networks and the numbers within them are assigned to particular network devices must take into consideration network routing, physical locality and logical or historical grouping. This document is designed to provide guidance for these issues.
Most State agencies share one or more of the following common attributes:
- they have office space in more than one building and more than one city
- they share space with other agencies
- they move from one space to another often
There is a tendency when assigning IP addresses to devices in one physical location to use one IP sub-net for all the devices at that location regardless of agency or logical or historic grouping.
DIR recommends the following:
- State agencies should acquire Class C IP networks for each physically contiguous facility. In cases where more than 255 devices are in such contiguous facility, multiple Class C networks may be used.
- When numbering devices in a physically contiguous facility using more than one Class C network, agencies should consider what functions of the facility might be moved or separated from the existing facility in the future and number these possible divisions separately.
Agencies needing help with IP address assignment should contact the Telecommunications Division or send E-Mail to firstname.lastname@example.org