> # Starting a Distribution Session on a Switch

> A distribution session starts the moment you begin a RADIUS or TACACS+ server or global configuration. For example, the following tasks start an implicit session:

> - Specifying the global timeout for RADIUS servers.
> - Specifying the global timeout for TACACS+ servers.

> Note After you issue the first configuration command related to AAA servers, all server and global configurations that are created (including the configuration that caused the distribution session start) are stored in a temporary buffer, not in the running configuration.

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