Logical grouping of VPN tunnels

摘要

Virtual Private Network (VPN) tunnels through a backbone network operated by a service provider may be considered as a logical grouping where the VPN tunnels share certain characteristics. The forwarding of a received packet onto a particular one of these VPN tunnels may be determined through a cascade of lookup tables. According to satisfaction of classification criteria, a given received packet may be modified for special treatment within the backbone network.