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Configuring Routing 367
Figure 8-17. External Link State Table
Link Type
— The external link type. Each link state advertisement has a specific format. This field
is always external link.
Link ID
— The routing domain piece described by the advertisement. It is either a router ID or an
IP address.
Router ID
— The originating router in the autonomous system.
Sequence Number
— The external link sequence number. The sequence number detects both old
and duplicate links state advertisements. The larger the sequence number the more recent the
advertisement.
Age
— The external link age state advertisement in seconds.
Checksum
— Checksum of the advertisement complete contents, excluding the
Age
value.
Viewing the OSPF External Route Table Using CLI Commands
The following table contains the CLI commands for viewing the OSPF External Route Table.
Table 8-13. OSPF External Route Table CLI Commands
CLI Command Description
show ip OSPF
[
area-id
]
database
[external] [
link-
state-id
]
Lists related to the OSPF database for a specific router.