Table of Contents
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Chapter 9
Management Network Connectivity
Table 9-8
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
9.7.1 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.
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
Cisco ONS 15600 Reference Manual, R7.0
9.7.1 Point-to-Point Protocol
IP-OSI Mediation
4
•
T–TD
5
•
FT–TD
2
3
6
—
—
IP-over-CLNS
•
tunnels
—
7
9-27
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