Does the admin_server have a failover facility? What funtion does admin_server provide?

Issue

• KDC can be set to multiple kerberos servers. what function or service does the kdc server provide? (Distribute the kerberos ticket?)

• The admin_server cannot be set to multiple kerberos servers because it does not provide failover functionality. By default admin_server is the master kdc server.

• What if the admin_server goes down ? What function or service does the admin_server provide? (In my mind, create key, modify key, manage principla)

• If the admin_server went down, can the kerberos client also authenticate to kerber server(Maybe admin_server went down, there is another slave kerberos service which is not admin_server)?

• If the admin_server went down, and the kerberos ticket was expired, can I re-generate the kerberos ticket?

• If the admin_server went down, can a new client be added to kerberos server?