Qtech QSW-3900-48-SFP-DC [107/245] Router lsa

Qtech QSW-3900-48-SFP-DC [107/245] Router lsa
QTECH Software Configuration Manual
8-106
LSA header format
Major fields :
· 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.
· LS type : Type of the LSA.
· Link State ID : The contents of this field depend on the LSA's type
· LS sequence number : Used by other routers to judge new and old LSAs.
· LS checksum : Checksum of the LSA except the LS age field.
· Length : Length in bytes of the LSA, including the LSA header.
8.1.5.8 Formats of LSAs
1) Router LSA
Router LSA format
Major fields :
· Link State ID : ID of the router that originated the LSA.
· V (Virtual Link) : Set to 1 if the router that originated the LSA is a virtual link endpoint.
· E (External) : Set to 1 if the router that originated the LSA is an ASBR.
· B (Border) : Set to 1 if the router that originated the LSA is an ABR.
· # links : Number of router links (interfaces) to the area, described in the LSA.
· Link ID : Determined by Link type.
· Link Data : Determined by Link type.
· Type : Link type. A value of 1 indicates a point-to-point link to a remote router; a value of 2 indicates a link

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