The NetEngine 8000 F ensures high reliability of services through the following approaches:
Status control: Several BRASs negotiate a master BRAS through VRRP. With the help of BFD or Ethernet OAM, the master BRAS can detect a link fault quickly and traffic can be switched to the standby BRAS immediately.
Service control: Information about access users is backed up to the standby BRAS from the master BRAS through TCP. This ensures service consistency.
Route control: By controlling routes in the address pool or user routes in a real-time manner, the BRAS ensures that downstream traffic can reach users smoothly when an active/standby switchover occurs.
Different services use different forwarding controls: