==Standards==* RFC 1701: "Generic Routing Encapsulation (GRE)" (informational)* RFC 1702: "Generic Routing Encapsulation over IPv4 networks" (informational)* RFC 2637: "Point to Point Tunneling Protocol" (informational)* RFC 2784: "Generic Routing Encapsulation (GRE)" (proposed standard, updated by RFC 2890)* RFC 2890: "Key and Sequence Number Extensions to GRE" (proposed standard)==References====External links==* Generic Routing Encapsulation, Subprotocol homepage at Cisco* Generic Routing Encapsulation, Entry in Cisco DocWiki (formerly known as the "Internetworking Technology Handbook")
* Проблема DF бита и фрагментации в GRE туннелях* Создание VPN GRE туннеля в Linux* RFC 1701 — Generic Routing Encapsulation (GRE), октябрь 1994* RFC 1702 — Generic Routing Encapsulation over IPv4 networks, октябрь 1994* RFC 2784 — Generic Routing Encapsulation (GRE), июль 2000* RFC 2890 — Key and Sequence Number Extensions to GRE, сентябрь 2000