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 (18A, 18B), 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 caching router, that is coupled to a local content cache of the metro transport network, and by at least one network provider edge router positioned, and operable to carry traffic, between the at least one Internet service provider network and the metro transport network, wherein the at least one caching router is owned and operated by a metro transport network and each of the at least one Internet service provider networks is owned and operated by an Internet service provider; receiving, by the caching router of the EVPN and from the access 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; outputting a routing protocol route advertisement that advertises the network address reachability information of the local content cache of the metro transport network to a router of the Internet service provider network; responsive to the routing protocol route advertisement, associating, by the Internet service provider network, the caching router as the forwarding next hop for the local content cache; and responsive to content requests redirected from the Internet service provider network and based on the EVPN router advertisement from the access router, forwarding, with the caching router of the metro transport network and by the EVPN, content from the local content cache to the access routers for delivery to one or more of the subscribers. 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 (18A, 18B), 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 caching router, that is coupled to a local content cache of the metro transport network, and by at least one network provider edge router positioned, and operable to carry traffic, between the at least one Internet service provider network and the metro transport network, wherein the at least one caching router is owned and operated by a metro transport network and each of the at least one Internet service provider networks is owned and operated by an Internet service provider; receiving, by the caching router of the EVPN and from the access 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; outputting a routing protocol route advertisement that advertises the network address reachability information of the local content cache of the metro transport network to a router of the Internet service provider network; responsive to the routing protocol route advertisement, associating, by the Internet service provider network, the caching router as the forwarding next hop for the local content cache; and responsive to content requests redirected from the Internet service provider network and based on the EVPN router advertisement from the access router, forwarding, with the caching router of the metro transport network and by the EVPN, content from the local content cache to the access routers for delivery to one or more of the subscribers.