Lsa header format – H3C Technologies H3C WX6000 Series Access Controllers User Manual
Page 248
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25-14
Figure 25-14
LSAck packet format
...
LSA header format
All LSAs have the same header, as shown in the following figure.
Figure 25-15
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.
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