You want to generate an OID to use with a new class or attribute you intend to add to the schema.
You have two options for generating an OID. First, you can generate a
base OID off of the Microsoft OID tree. This can be done with the
Oidgen.exe utility from the Resource Kit:
oidgenAttribute Base OID: 1.2.840.1135126.96.36.19900.233.28688.28684.8.2849.956347.1967079.334190 Class Base OID: 1.2.840.1135188.8.131.5200.111.28688.28684.8.370553.291204.940269.113484
Oidgen is really easy, but if you want to
implement schema extensions for production use, I strongly suggest
you consider using an OID from your company or
organization’s OID branch. To determine if your
company already has an assigned OID, see these sites:
If your organization does not have an assigned OID, go to your country’s national registry to request one. The list of registries can be found at the following site: http://www.iso.ch/iso/en/aboutiso/isomembers/index.html.
Once you have a base OID, you can create branches from that OID however you want. For example, if you had a base OID of 184.108.40.206, you could start new class OIDs under 220.127.116.11.1 and new attributes under 18.104.22.168.2. In that case, the first class OID you would create would be 22.214.171.124.1.1 and the first attribute OID would be 126.96.36.199.2.1.
An OID is nothing more than a string of numbers separated ...