Инструкции По Установке для 3com S7906E

 

1-14 

Link State Acknowledgment (LSAck) packets are used to acknowledge received LSU packets by 

carrying LSA headers to describe corresponding LSAs. Multiple LSAs can be acknowledged in a single 

LSAck packet. The following figure gives its format. 

Figure 1-14 LSAck packet format 

...

 

 

All LSAs have the same header, as shown in the following figure. 

Figure 1-15 LSA header format 

 

 

Major fields: 

z 

LS age: Time in seconds elapsed since the LSA was originated. A LSA ages in the LSDB (added 

by 1 per second), but does not in transmission. 

z 

LS type: Type of the LSA.  

z 

Link State ID: The contents of this field depend on the LSA's type 

z 

LS sequence number: Used by other routers to judge new and old LSAs.  

z 

LS checksum: Checksum of the LSA except the LS age field. 

z 

Length: Length in bytes of the LSA, including the LSA header. 

1) Router 

LSA