H3C Technologies H3C S12500 Series Switches - Manual (Page 82)

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Figure 28 LSR packet format
Major fields of the LSR packets are as follows:
• LS type—Type of the LSA to be requested. Type 1, for example, indicates the Router LSA.
• Link state ID—Determined by LSA type.
• Advertising router—ID of the router that sent the LSA.
LSU packet
LSU (Link State Update) packets are used to send the requested LSAs to the peer. Each packet carries a
collection of LSAs.
Figure 29 LSU packet format
LSAck packet
Link State Acknowledgment (LSAck) packets are used to acknowledge received LSU packets. An LSAck
packet carries the headers of LSAs to be acknowledged.