> # FSPF LSDB LSRs

> Field | Description
> --- | ---
> AdvDomainId | Domain Id of the switch that is advertising the LSR on the behalf of the switch owning it.
> Age | Time since this LSR was inserted into the database.
> IncarnationNumber | The link state incarnation number of this LSR. This is used to identify most recent instance of an LSR while updating the topology database when an LSR is received. The updating of an LSR includes incrementing its incarnation number prior to transmission of the updated LSR. So most recent LSR is the one with larger incarnation number.
> CheckSum | The checksum of the LSR.
> Links | Number of entries associated with this LSR.
> External | Indicates of this is an external LSR advertised by local switch.

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