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Table Of Contents  The TCP/IP Guide
 9  TCP/IP Lower-Layer (Interface, Internet and Transport) Protocols (OSI Layers 2, 3 and 4)
      9  TCP/IP Internet Layer (OSI Network Layer) Protocols
           9  TCP/IP Routing Protocols (Gateway Protocols)
                9  TCP/IP Interior Routing Protocols (RIP, OSPF, GGP, HELLO, IGRP, EIGRP)
                     9  Open Shortest Path First (OSPF)

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OSPF General Operation and Message Types
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 Other Interior Routing Protocols
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OSPF Message Formats
(Page 5 of 7)

Link State Update Message Format

These messages have a Type value of 4 in the header, and the fields illustrated in Table 130 and Figure 188.


Table 130: OSPF Link State Update Message Format

Field Name

Size (bytes)

Description

# LSAs

4

Number of LSAs: The number of link-state advertisements included in this message.

LSAs

Variable

LSAs: One or more link-state advertisements. See below for more details.


Figure 188: OSPF Link State Update Message Format

 

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OSPF General Operation and Message Types
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67
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 Other Interior Routing Protocols
Next Topic/Section

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