Monitor | Statistics | MIB-II | OSPF
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VPN 3000 Concentrator Series User Guide
Area LSA Count
The total number of Link-State Advertisements in this area’s link-state database, excluding AS external
LSAs.
Area LSA Checksum
The sum of the checksums of the Link-State Advertisements in this area’s link-state database. This sum
excludes external LSAs. You can use this sum to determine if there has been a change in the area’s
link-state database, and to compare its database with other routers.
External LSAs
This table shows a row for each external Link-State Advertisement in the link-state database.
Area ID
The Area ID identifies the Area from which the LSA was received.
Type
The LSA type. Each LSA type has a different format.
Router Link = Describes the states of the router’s interfaces (LS Type 1).
Network Link = Describes the set of routers attached to the network (LS Type 2).
Summary Link = Describes routes to networks (LS Type 3).
AS Summary Link = Describes routes to AS boundary routers (LS Type 4).
AS External Link = Describes routes to destinations external to the AS (LS Type 5).
Multicast Link = Describes group membership for multicast OSPF routing (LS Type 6).
NSSA External Link = Describes routing for NSSAs: Not-So-Stubby-Areas (LS Type 7).
Link State ID
Either a router ID or an IP address that identifies the piece of the routing domain being described by the
LSA.
Router ID
The identifier of the router in the Autonomous System that originated this LSA.
Sequence
The sequence number of this LSA. Sequence numbers are linear. They are used to detect old and
duplicate LSAs. The larger the number, the more recent the LSA.
Age
The age of the LSA in seconds.