Supported NAT and SIP Standards

On routers equipped with one or more Adaptive Services PICs (both standalone and integrated versions) or Multiservices PICs or DPCs, the Junos OS substantially supports the following Network Address Translation (NAT) and Session Initiation Protocol (SIP) standards. NAT supports SIP dialogs and UDP/IP version 4 (IPv4) transport of SIP messages.

The Junos OS substantially supports the following RFC, which defines a standard for SIP.

• RFC 3261, SIP: Session Initiation Protocol

The following RFCs do not define standards, but provide information about NAT. The IETF classifies them variously as “Best Current Practice,” “Historic” or “Informational.”

• RFC 1631, The IP Network Address Translator (NAT)
• RFC 2663, IP Network Address Translator (NAT) Terminology and Considerations
• RFC 2766, Network Address Translation - Protocol Translation (NAT-PT)
• RFC 2993, Architectural Implications of NAT
• RFC 3022, Traditional IP Network Address Translator (Traditional NAT)
• RFC 4787, Network Address Translation (NAT) Behavioral Requirements for Unicast UDP
• RFC 5382, NAT Behavioral Requirements for TCP
• RFC 5508, NAT Behavioral Requirements for ICMP

Related Topics

• Services PIC and DPC Features in the Junos OS
• Accessing Standards Documents on the Internet