VRRP is configured on the public and private interfaces in this configuration. VRRP applies only to configurations where two or more VPN Concentrators operate in parallel. All participating VPN Concentrators have identical user, group, and LAN-to-LAN settings. If the Master fails, the Backup begins to service traffic formerly handled by the Master. This switchover occurs in 3 to 10 seconds. While IPsec and Point-to-Point Tunnel Protocol (PPTP) client connections are disconnected during this transition, users need only to reconnect without changing the destination address of their connection profile. In a LAN-to-LAN connection, switchover is seamless