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Chapter 4. Routing | 273
ProSafe® Gigabit L3 Managed Stackable Switches Software Administration Manual
1. Use Area ID to enter the OSPF area ID. An Area ID is a 32-bit integer in dotted decimal
format that uniquely identifies the area to which a router interface connects.
Table 29.
Field Description
Aging Interval The Link State Advertisement (LSA) aging timer
interval.
External Routing A definition of the router's capabilities for the area,
including whether or not AS-external-LSAs are
flooded into/throughout the area. If the area is a stub
area, then these are the possible options for which
you may configure the external routing capability,
otherwise the only option is “Import External LSAs”:
• Import External LSAs: Import and propagate
external LSAs
• Import No LSAs: Do not import and propagate
external LSAs
SPF Runs The number of times that the intra-area route table
has been calculated using this area's link-state
database. This is typically done using Dijkstra's
algorithm.
Area Border Router Count The total number of area border routers reachable
within this area. This is initially zero, and is
calculated in each SPF Pass.
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 32-bit unsigned sum of the link-state
advertisements' LS checksums contained in this
area's link-state database. This sum excludes
external (LS type 5) link-state advertisements. The
sum can be used to determine if there has been a
change in a router's link state database, and to
compare the link-state database of two routers.
Import Summary LSAs The summary LSAs will be enabled/disabled
imported into this area.
Click ADD to configure the area as a common area.
Click DELETE to delete the common area.
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