Point-To-Point Protocol - Cisco ONS 15454 Reference Manual

13.7 13.7.1 Point-to-Point Protocol

Table 13-10
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
13.7.1 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 SDCC or LDCC. The SDCC or LDCC
can be provisioned to support OSI over PPP.
Cisco ONS 15454 Reference Manual, R7.0.1
13-32
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.
Chapter 13
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
Management Network Connectivity
IP-OSI Mediation
4
• T–TD
5
• FT–TD
2
3
6
IP-over-CLNS
•
tunnels
OL-9217-01
7