H3C Technologies H3C S10500 Series Switches - Manual (Page 82)

67
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
Version 4
Router ID
Area ID
Checksum AuType
Packet length
Authentication
Authentication
Number of LSAs
LSA
0 7 15 31
LSA
LSAck packet
Link State Acknowledgment (LSAck) packets are used to acknowledge received LSU packets. An LSAack
packet carries the headers of LSAs to be acknowledged.