IP Routing Features
Configuring OSPF
Displaying OSPF SPF Statistics
To display the log used to record shortest-path-first (SPF) calculations on an
OSPF-enabled routing switch, enter the show ip ospf spf-log command at any
CLI level. The SPF algorithm recalculates the routes in an OSPF domain when
a change in the area topology is received.
Syntax: show ip ospf spf-log
The show ip ospf spf-log command output displays:
■ The number of times that the SPF algorithm was executed for each OSPF
area to which the routing switch is assigned
■ The event that resulted in the last ten executions of the SPF algorithm on
the routing switch. Possible events (reasons) are as follows:
• Re-Init: OSPF was enabled or disabled on the routing switch.
• Router LS Update: A router (type 1) link-state advertisement was
received.
• Network LS Update: A network (type 2) link-state advertisement was
received.
• Generated RTR LSA: A router (type 1) link-state advertisement was
generated on the routing switch.
• Generated NTW LSA: A network (type 2) link-state advertisement was
generated on the routing switch.
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