Variable definitions

The following table describes the Link State Database tab fields.

Variable Value
AreaId Specifies the unique identifier of the Area from which the link state advertisement was received.
Type Specifies the type of link state advertisement. Each link state type has a separate advertisement format.
Lsid Specifies the Link State ID, a link state type-specific field containing either a Router ID or an IP address. This field identifies the section of the routing domain that is being described by the advertisement.
RouterId Specifies the unique identifier of the originating router in the Autonomous System.
Sequence This field is used to detect old or duplicate link state advertisements by assigning an incremental number to duplicate advertisements. The higher the sequence number, the more recent the advertisement.
Age Specifies the age of the link state advertisement in seconds.
Checksum Specifies the checksum of the complete content of the advertisement, excluding the Age field. This field is excluded so that the advertisement’s age can be increased without updating the checksum. The checksum used is the same as that used in ISO connectionless datagrams and is commonly referred to as the Fletcher checksum.