H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 247)

25-13
Figure 25-12 LSR packet format
Major fields:
z
LS type: Type number of the LSA to be requested. Type 1 for example indicates the Router LSA.
z
Link State ID: Determined by LSA type.
z
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 peers, and each packet
carries a collection of LSAs. The LSU packet format is shown below.
Figure 25-13 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
LSAack (Link State Acknowledgment) packets are used to acknowledge received LSU packets,
contents including LSA headers to describe the corresponding LSAs. Multiple LSAs can be
acknowledged in a single Link State Acknowledgment packet. The following figure gives its format.