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The following fields are displayed in the OSPF LSDB Table:
Parameter Description
Area ID
Allows the entry of an OSPF Area ID.This Area ID will then be used to search the table, and display an entry –
if there is one.
LSDB Type Displays which one of eight types of link advertisements by which the current link was discovered by the
Switch:
All,Router link (RTRLink),Network link (NETLink),Summary link (Summary),Autonomous System link
(ASSummary),Autonomous System external link (ASExternal), MCGLink (Multicast Group),and NSSA (Not So
Stubby Area)
Adv. Router ID Displays the Advertising Router’s ID.
Link State ID This field identifies the portion of the Internet environment that is being described by the advertisement.
The contents of this field depend on the advertisement's LS type.
LS Type LinkState ID
1 The originating router's Router ID.
2 The IP interface address of the network's Designated Router.
3 The destination network's IP address.
4
The Router ID of the described AS boundary router.
Cost Displays the cost of the table entry.
Sequence Displa
ys a sequence number corresponding to number of times the current link has been advertised as
changed.
Browse OSPF Neighbor Table
This table can be found in the OSPF Monitoring folder by clicking on the Browse OSPF Neighbor Table link. Routers that are connected to the same
area or segment become neighbors in that area.Neighbors are elected via the Hello protocol.IP multicast is used to send out Hello packets to other routers on
the segment.Routers become neighbors when they see themselves listed in a Hello packet sent by another router on the same segment.In this way,two-way
communication is guaranteed to be possible between any two neighbor routers.This table displays OSPF neighbors of the Switch.
Figur
e 9- 35.
OSPF Neighbor
Table
To search for OSPF neighbors,enter an IP address and click
Find.Valid OSPF neighbors will appear in the OSPF Neighbor Table below.
OSPF V
irtual Neighbor
This table can be found in the OSPF Monitoring folder by clicking on the Browse OSPF Virtual Neighbor link.This table displays a list of Virtual
OSPF Neighbors
of the Switch.The user may choose specifically search a virtual neighbor by using one of the two search options at the top of the screen,
which are:
Parameter Description
Transit Area ID Allows the entry of an OSPF Area ID – previously defined on the Switch – that allows a remote area to
communicate with the backbone (area 0).A Transit Area cannot be a Stub Area or a Backbone Area.
Neighbor ID The OSPF router ID for the remote router.This IP address uniquely identifies the remote area’s Area Border
Router
.
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Allied Telesyn AT-9724TS High-Density Layer 3 Stackable Gigabit Ethernet Switch