| AreaId |
| The 32 bit identifier of the Area from which the LSA was received. |
| Type |
| The type of the link state advertisement. Each link state type has a separate advertisement format. Enumerations: - routerLink (1)
- networkLink (2)
- summaryLink (3)
- asSummaryLink (4)
- asExternalLink (5)
- multicastLink (6)
- nssaExternalLink (7)
|
| Lsid |
| The Link State ID is an LS Type Specific field containing either a Router ID or an IP Address; it identifies the piece of the routing domain that is being described by the advertisement. |
| RouterId |
| The 32 bit number that uniquely identifies the originating router in the Autonomous System. |
| Sequence |
| The sequence number field is a signed 32-bit integer. It is used to detect old and duplicate link state advertisements. The space of sequence numbers is linearly ordered. The larger the sequence number the more recent the advertisement. Range: 0 to -1 |
| Age |
| This field is the age of the link state advertisement in seconds. |
| Checksum |
| This field is the checksum of the complete contents of the advertisement, excepting the age field. The age field is excepted so that an advertisement's age can be incremented without updating the checksum. The checksum used is the same that is used for ISO connectionless datagrams; it is commonly referred to as the Fletcher checksum. Range: 0 to -1 |
| Advertisement |
| The entire Link State Advertisement, including its header. |