... VPN, GRE VPN, DSVPN, SSL VPN, L2TP VPNQoSDiffserv mode, MPLS QoS, priority mapping, traffic policing (CAR), traffic shaping, congestion avoidance (based ... ), NTP, CWMP, Auto-Config, deployment using USB disk, NetConf, CLI Huawei AR2200 Series Enterprise Routers