Viewing OSPF SPF statistics
Displays the log used to record SPF calculations on an OSPF-enabled routing switch. 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 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.
Displaying OSPF SPF statistics
switch(ospf)# show ip ospf spf-log OSPF SPF (SHORTEST PATH FIRST) LOG Area : 0.0.0.100 - Number of times SPF executed : 12 SPF Instance Reason Time --------------- --------------------------- ---------------- 1 Router LS Update 0h:35m:44 2 Router LS Update 0h:36m:03 3 Generated RTR LSA 1h:04m:21 4 Generated NTW LSA 1h:28m:12 5 Network LS Update 2h:11m:05 6 Network LS Update 2h:54m:55 7 Generated RTR LSA 3h:01m:11 8 Router LS Update 3h:22m:39 9 Generated RTR LSA 4h:36m:22 10 Re-Init 4h:48m:54
area [ area id | ip-address] |
ID number or IP address of an area to which the switch is assigned, including the number of times the SPF algorithm was executed to recalculate OSPF routes in the area. |
SPF instances |
Last ten instances in which the SPF algorithm was executed to recalculate an OSPF route in the area. |
Reason |
The event or reason why the SPF algorithm was executed. |
Time |
Time when the SPF computation began. |