FAST PATH CONTENT DELIVERY OVER METRO ACCESS NETWORKS

摘要

Techniques are described that allow fast path delivery of content from content data networks directly to metro transport networks so as to bypass Internet service provider (ISP) networks. The metro transport network is positioned between subscriber devices and an Internet service provider network that authenticates the subscriber devices and allocates respective layer three (L3) addresses from an Internet Protocol (IP) network address prefix assigned to the Internet service provider network. Routes within the metro transport network, including an access router, ISP-facing provider edge routers and one or more peering routers, establish an EVPN within the metro transport network. The access router outputs, within the EVPN and to the peering router, an EVPN route advertisement that advertises network address reachability information of the subscriber devices (e.g., the IP network address prefix or MAC/IP address of the subscriber devices) on behalf of the Internet service provider network.

主权项

1. A method comprising:
establishing an Ethernet Virtual Private Network (EVPN) within a metro transport network positioned between at least one Internet service provider network and a set of subscriber devices, wherein the metro transport network provides layer two (L2) packet switching for transporting network packets between the Internet service provider network and the subscriber devices, wherein the Internet service provider network authenticates the subscriber devices and allocates the subscriber devices respective Internet Protocol (IP) network addresses from an IP network address prefix assigned to the Internet service provider network, and wherein the EVPN is established within the metro transport network by at least one access router that is connected to the subscriber devices by one or more access links and by at least one peering router of the metro transport network; and outputting, within the EVPN by the access router and to the peering router, an EVPN route advertisement that advertises network address reachability information of the subscriber devices on behalf of the Internet service provider network, wherein the EVPN route advertisement indicates that the subscriber devices are reachable through the access router.