Systems may be subscribed to channels in the following ways:
Registration through activation keys — Because of the simplicity and speed of activation keys, this is the preferred method for registering systems as clients of either RHN Proxy Server or RHN Satellite Server. Systems registered using an activation key are subscribed to all channels associated with that activation key. For more information on activation keys, consult the RHN Client Configuration Guide and the RHN Management Reference Guide.
Install registration — When a system is initially registered through either the Red Hat Update Agent or the Red Hat Network Registration Client, it is automatically assigned to the base channel that corresponds to the version of Red Hat Enterprise Linux on the system. For more information on using these applications, refer to the respective chapter of the RHN Reference Guide for your entitlement level (Management or Provisioning).
Website subscription — Various specific child channels are available for subscription, depending on the system's base channel. The system may be subscribed to the child channel through the RHN website. Customers who have created their own base channels may also reassign systems to these custom channels through the website. For more information on subscribing to channels online, refer to the RHN Website chapter of the RHN Reference Guide.