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. |