AIX boot servers do not have any special requirements. An AIX boot server can reside on the same subnet as the subnet of the client, or on a different subnet. However, AIX boot servers at a specific operating system version can only host SRTs of the same or earlier operating system version. For example, a 5.3.0.10 boot server can only host 5.1.x.x, 5.2.x.x, 5.3.0.0, and 5.3.0.10 SRTs, but not 5.3.0.20 SRTs. Likewise, a 5.2.x.x boot server cannot host 5.3.x.x SRTs.