Supported GRE and IP-IP Interface Standards

The Junos OS substantially supports the following RFCs, which define standards for generic routing encapsulation (GRE) and IP-IP interfaces.

• RFC 2003, IP Encapsulation within IP
• RFC 2784, Generic Routing Encapsulation (GRE)
• RFC 2890, Key and Sequence Number Extensions to GRE

  The key field is supported, but the sequence number field is not.

The following RFCs do not define standards, but provide information about GRE, IP-IP, and related technologies. The IETF classifies them as “Informational.”

• RFC 1701, Generic Routing Encapsulation (GRE)
• RFC 1702, Generic Routing Encapsulation over IPv4 networks
• RFC 2547, BGP/MPLS VPNs (over GRE tunnels)

Related Topics

• Accessing Standards Documents on the Internet