You are here

Informatics Forum subnets and VLANs

Printer-friendly versionPrinter-friendly version

The School of Informatics has some 40 or so different IP subnets in use.

Each of these subnets serves a particular purpose but, for users in the Informatics Forum, the five most important subnets are:

Subnet Purpose
129.215.24.0/22 DICE desktop machines
129.215.90.0/23 Self-managed machines using dynamically-assigned IP addresses
129.215.164.0/23 Self-managed machines using fixed IP addresses
129.215.197.0/24 Self-managed machines using fixed IP addresses
129.215.224.0/24 Windows managed desktop machines

(Note: the fact that we have two subnets for 'Self-managed machines using fixed IP addresses' is just because of the way addresses have been progressively allocated. Logically, these two subnets serve exactly the same purpose.)

Each of these subnets is carried on a particular VLAN - i.e. a virtual 'piece of ethernet'. The mapping of the above subnets to VLANs is:

Subnet VLAN name VLAN number
129.215.24.0/22 DICE 24
129.215.90.0/23 DHCP 90
129.215.164.0/23 SM164 164
129.215.197.0/24 SM197 197
129.215.224.0/24 MDT 224

In addition, VLAN 952 - called 'phones' - is used to carry the traffic to and from VoIP telephones in the Forum.

All of this means that, for example, should you want to use a laptop in the Informatics Forum on the 129.215.90.0/23 subnet, that laptop must be connected to a network port which has been configured to be on the 'DHCP' VLAN.

Last reviewed: 
18/10/2017

System Status

Home dirs (AFS)
Network
Mail
Other services
Scheduled downtime

Choose a topic