Air-Stream IP Addressing

Air-Stream uses private addressing from the 10/8 range utilising 10.96.0.0/11, this is designed to allow interconnection into wireless networks around Australia should the day ever come.

These are:

  • VIC – 10.0.0.0/11
  • WA – 10.32.0.0/11
  • NT – 10.64.0.0/12
  • ACT – 10.80.0.0/12
  • SA – 10.96.0.0/11
  • TAS – 10.128.0.0/11
  • QLD – 10.160.0.0/11
  • NSW – 10.192.0.0/11
  • NZ – 10.224.0.0/11

General rule of thumb is that an Access Point will be assigned 1x/27 for the Nodes hanging off it, 1x/27 for the Local LAN at the access point if applicable and each node will be assigned a single address from the Access Points /27 pool to which they then can route their very own /27 to if they wish.

In some circumstances an AP may require additional IP’s in which case another /27 is made available or a single /26 can be provisioned, it is unlikely and not very smart to run more than 30 nodes off a single Radio so the above would apply only to AP’s with multiple radios offering node access.

The majority of the Air-Stream backbones are run on /30’s

The Addressing scheme has been designed to allow scalability while also allowing good use of VLSM(Variable Length Subnet Masking) in the future to summarize route tables, each area is designated an inner and outer segment, inner being within 20km of the CBD and outer being further than 20km.

Glossary:

  • /27 is 30 usable IP’s, a /26 is 62 usable IP’s and a /30 is 2 usable IP’s.
  • An Access Point is the Radio that nodes terminate on, would almost always go into a router at the same location.
  • A Node is an end users radio that is acting as a client to the Access Point.
  • CBD is the Central Business District ?

This is how IPs are allocated, based on Adelaide CBD being the centre:

Section  Access Point Nodes Back Bone Member Subnets
North(In) 10.121.128.0/18 10.125.128.0/18 10.106.0.0/16
North(Out) 10.121.192.0/18 10.125.192.0/18 10.107.0.0/16
North-East(In) 10.122.0.0/18 10.126.0.0/18 10.108.0.0/16
North-East(Out) 10.122.64.0/18 10.126.64.0/18 10.109.0.0/16
East(In) 10.122.128.0/18 10.126.128.0/18 10.110.0.0/16
East(Out) 10.122.192.0/18 10.126.192.0/18 10.111.0.0/16
South-East(In) 10.123.0.0/18 10.127.0.0/18 10.112.0.0/16
South-East(Out) 10.123.64.0/18 10.127.64.0/18 10.113.0.0/16
South(In) 10.123.128.0/18 10.127.128.0/18 10.114.0.0/16
South(Out) 10.123.192.0/18 10.127.192.0/18 10.115.0.0/16
South-West(In) 10.120.0.0/18 10.124.0.0/18 10.100.0.0/16
South-West(Out) 10.120.64.0/18 10.124.64.0/18 10.101.0.0/16
West(In) 10.120.128.0/18 10.124.128.0/18 10.102.0.0/16
West(Out) 10.120.192.0/18 10.124.192.0/18 10.103.0.0/16
North-West(In) 10.121.0.0/18 10.125.0.0/18 10.104.0.0/16
North-West(Out) 10.121.64.0/18 10.125.64.0/18 10.105.0.0/16