Cisco Systems ONS 15600 manual Point-to-Point Protocol

Chapter 9 Management Network Connectivity

9.7.1 Point-to-Point Protocol

Table 9-8	TCP/IP and OSI Protocols
OSI Model		IP Protocols		OSI Protocols				IP-OSI Mediation
Layer 7		•	TL1	•	TARP1	•	TL1 (over	•	T–TD4
Application		•	FTP				OSI)	•	FT–TD5
		•	HTTP			•	FTAM2
							ACSE3
		•	Telnet			•
Layer 6		•	IIOP			•	PST6	—
Presentation
Layer 5						•	Session	—
Session
Layer 4		•	TCP			•	TP (Transport)	• IP-over-CLNS7
Transport		•	UDP				Class 4		tunnels
Layer 3		•	IP	•	CLNP8
Network		•	OSPF	•	ES-IS9
				•	IS-IS10
Layer 2 Data		•	PPP	•	PPP
link				• LAP-D11
Layer 1		DCC, LAN, fiber,		DCC, LAN, fiber, electrical				—
Physical		electrical

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

9.7.1Point-to-Point Protocol

PPPis 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:

•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.

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 15600 Reference Manual, R7.2

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