Technical information

10
PACKET OVER SONET
ADMINISTRATION
This section provides instruction on how to configure Packet over SONET
(POS) on the Cuda 12000 using Cuda Chassis Manager and includes:
■ About Packet Over SONET
■ Packet Over SONET (POS) Interface Administration
■ Configuring Point-to-Point Protocol (PPP)
The Cuda 12000 supports OC-3c and OC-12c SONET interfaces. For more
information about OC-3c and OC-12c modules, refer to the “Cuda 12000
Installation Guide.”
About Packet Over SONET
Packet Over SONET enables the Cuda 12000 to transmit IP packets over
SONET links; essentially placing the IP layer over the SONET physical layer.
POS makes efficient use of bandwidth, allowing for lower packet overhead
and extremely fast transmission speeds.
The system uses point-to-point protocol (PPP) to transport IP data over
SONET point-to-point circuits, as described in RFC 2615. The IP over SONET
transmission process consists of three primary steps:
■ Encapsulate the IP datagram into a PPP frame.
■ Place the PPP frame into the payload portion of the SONET frame.
■ Transmit the SONET frame over the point-to-point circuit.