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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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OSPF Message Formats
(Page 6 of 7)

Link State Acknowledgment Message Format

These messages have a Type value of 5 in the header. They then contain a list of LSA headers corresponding to the LSAs being acknowledged, as shown in Table 131 and Figure 189.


Table 131: OSPF Link State Acknowledgment Message Format

Field Name

Size (bytes)

Description

LSA Headers

Variable

LSA Headers: Contains link-state advertisement headers, to identify the LSAs acknowledged.



Figure 189: OSPF Link State Acknowledgment Message Format

 


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