Brocade Mobility RFS Controller System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 842)

830 Brocade Mobility RFS Controller System Reference Guide
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5. Select the Refresh button to update the statistics counters to their latest values.
OSPF Route Statistics
OSPF
Refer to the Routes tab to assess the status of OSPF Border Routes, External Routes, Network
Routes and Router Routes.
To view OSPF route statistics:
1. Select the Statistics menu from the Web UI.
2. Select a Wireless Controller node from the left navigation pane.
3. Select OSPF from the left-hand side of the UI.
4. Select the Routes tab. Border routes display by default.
An area border router (ABR) connects (links) more than one area. Usually an ABR is used to
connect non-backbone areas to the backbone. If OSPF virtual links are used an ABR will also
be used to connect the area using the virtual link to another non-backbone area. Border routes
use internal OSPF routing table entries to an ABR or Autonomous System Boundary Router
(ASBR). Border routers maintain an LSDB for each area supported. They also participate in the
backbone.
5. Refer to External Routes tab.
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.
Opaque link CSUM Displays the Type-10 opaque link checksum with the complete contents of the LSA.