Point-To-Point Protocol - Cisco ONS 15600 Reference Manual

9.6.1 Point-to-Point Protocol

Table 9-7
OSI Model
Layer 7
Application
Layer 6
Presentation
Layer 5
Session
Layer 4
Transport
Layer 3
Network
Layer 2 Data
link
Layer 1
Physical
1. TARP = TID Address Resolution Protocol
2. FTAM = File Transfer and Access Management
3. ACSE = Association-control service element
4. T–TD = TL1–Translation Device
5. FT–TD = File Transfer—Translation Device
6. PST = Presentation layer
7. CLNS = Connectionless Network Layer Service
8. CLNP = Connectionless Network Layer Protocol
9. ES-IS = End System-to-Intermediate System
10. IS-IS = Intermediate System-to-Intermediate System
11. LAP-D = Link Access Protocol on the D Channel
9.6.1 Point-to-Point Protocol
PPP is a data link (Layer 2) encapsulation protocol that transports datagrams over point-to-point links.
Although PPP was developed to transport IP traffic, it can carry other protocols including the OSI CLNP.
PPP components used in the transport of OSI include:
•
•
CTC automatically enables IP over PPP whenever you create an RS-DCC or MS-DCC. The RS-DCC or
MS-DCC can be provisioned to support OSI over PPP.
Cisco ONS 15600 SDH Reference Manual, Release 9.0
9-26
TCP/IP and OSI Protocols
IP Protocols
TL1
•
FTP
•
HTTP
•
Telnet
•
IIOP
•
TCP
•
UDP
•
IP
•
OSPF
•
PPP
•
DCC, LAN, fiber,
electrical
High-level data link control (HDLC)—Performs the datagram encapsulation for transport across
point-to-point links.
Link control protocol (LCP)—Establishes, configures, and tests the point-to-point connections.
OSI Protocols
1
TARP TL1 (over
• •
OSI)
• FTAM
• ACSE
• PST
Session
•
TP (Transport)
•
Class 4
8
CLNP
•
9
ES-IS
•
10
IS-IS
•
PPP
•
11
LAP-D
•
DCC, LAN, fiber, electrical
Chapter 9 Management Network Connectivity
IP-OSI Mediation
4
T–TD
•
FT–TD
•
2
3
6
—
—
IP-over-CLNS
•
tunnels
—
5
7
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