References

For more information about IP tunnels, see the following documents:

• RFC 1700—Assigned Numbers (October 1994)
• RFC 1701—Generic Routing Encapsulation (October 1994)
• RFC 1702—Generic Routing Encapsulation over IPv4 Networks (October 1994)
• RFC 2003—IP Encapsulation within IP (October 1996)
• RFC 2784—Generic Routing Encapsulation (GRE) (March 2000)