How do I configure shared licensing on an ASA ?

A shared license lets you purchase a large number of SSL VPN sessions and share the sessions as needed amongst a group of security appliances by configuring one of the security appliances as a shared licensing server, and the rest as shared licensing participants.
Below shows the steps on how to configure a Shared License server.

1. Install Cisco license key, run the commands:

activation-key key reload

2. Configure license server :

license-server enable interface (Inside interface)            
license-server secret   ‘your-password’
license-server port port  50554
license-server refresh-interval 100
wr mem

3.  Configure shared license ASA’s.

license-server address  X.X.X.X  secret [password] port 50554 wr mem

4.  Confirming shared license  – show shared license

hostname >  show shared license
Primary License Server : 10.3.32.20
  Version              : 1
  Status               : Inactive

Shared license utilization:
  SSLVPN:
    Total for network :     5000
    Available         :     5000
    Utilized          :        0
  This device:
    Platform limit    :      250
    Current usage     :        0
    High usage        :        0
  Messages Tx/Rx/Error:
    Registration    : 0 / 0 / 0
    Get             : 0 / 0 / 0
          Release         : 0 / 0 / 0
          Transfer        : 0 / 0 / 0