Brocade Mobility Access Point System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 792)

782 Brocade Mobility Access Point System Reference Guide
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FIGURE 52 Access Point - OSPF Area Details tab
The Area Details tab describes the following:
OSPF Area ID Displays either the integer (numeric ID) or IP address assigned to the OSPF area as a unique
identifier.
OSPF INF Lists the interface ID (virtual interface for dynamic OSPF routes) supporting each listed OSPF area
ID.
Auth Type Lists the authentication schemes used to validate the credentials of dynamic route connections and
their areas.
Total LSA Lists the Link State Advertisements (LSAs) of all entities using the dynamic route (in any direction) in
the listed area ID.
Router LSA Lists the Link State Advertisements of the router supporting each listed area ID. The router LSA
reports active router interfaces, IP addresses, and neighbors.
Network LSA Displays which routers are joined together by the designated router on a broadcast segment (e.g.
Ethernet). Type 2 LSAs are flooded across their own area only. The link state ID of the type 2 LSA is
the IP interface address of the designated route.
Summary LSA The summary LSA is generated by ABR to leak area summary address info into another areas. ABR
generates more than one summary LSA for an area if the area addresses cannot be properly
aggregated by only one prefix.
ASBR Summary
LSA Originated by ABRs when an ASBR is present to let other areas know where the ASBR is. These are
supported just like summary LSAs.
NSSA LSA Routers in a Not-so-stubby-area (NSSA) do not receive external LSAs from Area Border Routers, but
are allowed to send external routing information for redistribution. They use type 7 LSAs to tell the
ABRs about these external routes, which the Area Border Router then translates to type 5 external
LSAs and floods as normal to the rest of the OSPF network.
Redistribution into an NSSA area creates a special type of LSA known as TYPE 7, which can exist
only in an NSSA area. An NSSA ASBR generates this LSA, and an NSSA ABR router translates it into
type 5 LSA which gets propagated into the OSPF domain.
Opaque Area link
CSUM Displays the Type-10 opaque link area checksum with the complete contents of the LSA. Type-10
Opaque LSAs are not flooded beyond the borders of their associated area.