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Dell Configuration Guide for the S4048–ON System 9.14.2.5

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Configuring Re-Authentication

Starting from Dell EMC Networking OS 9.11(0.0), the system enables re-authentication of user whenever there is a change in the authenticators.

The change in authentication happens when:
  • Add or remove an authentication server (RADIUS/TACACS+)
  • Modify an AAA authentication/authorization list
  • Change to role-only (RBAC) mode

The re-authentication is also applicable for authenticated 802.1x devices. When there is a change in the authetication servers, the supplicants connected to all the ports are forced to re-authenticate.

  1. Enable the re-authentication mode.
    CONFIGURATION mode
    aaa reauthentication enable
  2. You are prompted to force the users to re-authenticate while adding or removing a RADIUS/TACACS+ server.
    CONFIGURATION mode
    aaa authentication login method-list-name
    Example:
    DellEMC(config)#aaa authentication login vty_auth_list radius
    Force all logged-in users to re-authenticate (y/n)? 
  3. You are prompted to force the users to re-authenticate whenever there is a change in the RADIUS server list..
    CONFIGURATION mode
    radius-server host IP Address
    Example:
    DellEMC(config)#radius-server host 192.100.0.12 
    Force all logged-in users to re-authenticate (y/n)?
    DellEMC(config)#no radius-server host 192.100.0.12 
    Force all logged-in users to re-authenticate (y/n)?

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