display ospf spf-statistics

Function

The display ospf spf-statistics command displays route calculation statistics in OSPF processes.

Format

display ospf [ process-id ] spf-statistics [ verbose ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process. If no OSPF process ID is specified, brief information about route calculation statistics in all processes is displayed.	The value is an integer ranging from 1 to 65535.
verbose	Displays detailed information about route calculation statistics.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The display ospf spf-statistics command displays route calculation statistics in OSPF processes, including the time when route calculation occurs, cause of route calculation, and number of changed routes.

When identifying the cause of OSPF route flapping, you can run this command to obtain OSPF route calculation statistics, and then identify the cause according to the command output.

Example

# Display brief information about route calculation statistics in OSPF process 1.

<sysname> display ospf 1 spf-statistics

           OSPF Process 1 with Router ID 2.2.2.2

Routing table change statistics:

Date          Time            Intra       Inter    External    Reason
2014-11-14    10:17:16        17          17       17          LSA
2014-11-14    09:16:47        77          62       127         Other
2014-11-14    08:16:37        0           0        0           LSA
2014-11-14    07:04:40        24          230      108         LSA
2014-11-14    06:03:15        204         230      18          Other
2014-11-14    05:02:55        34          236      128         LSA
2014-11-14    04:01:49        54          130      158         LSA
2014-11-14    03:01:48        44          220      138         LSA
2014-11-14    02:01:43        22          233      158         LSA
2014-11-14    01:00:53        977         897      907         LSA

**Table 1** Description of the **display ospf spf-statistics** command output
Item	Description
Date	Date when route calculation occurs
Time	Time when route calculation occurs
Intra	Number of intra-area routes in the routing table, which are changed because of route calculation
Inter	Number of inter-area routes in the routing table, which are changed because of route calculation
External	Number of external routes in the routing table, which are changed because of route calculation
Reason	Cause of route calculation: LSA: indicates that route calculation is caused by LSAs. Topo: indicates that route calculation is caused by topology. Other: indicates that route calculation is caused by other causes. For example, the configuration changes; or the interface goes Down.

# Display detailed information about route calculation statistics in OSPF process 1.

<sysname> display ospf 1 spf-statistics verbose

           OSPF Process 1 with Router ID 2.2.2.2

Routing table change statistics:

Index: 1   This spf calculation is External increment calculation
           Time     : 2014-11-29,17:36:59
           Intra    : 0 Added,0 Deleted
           Inter    : 0 Added,0 Deleted
           External : 10 Added,0 Deleted
           The reason of calculation is:LSA
           NO.     Type          LS ID             Adv Router
           1       External      10.10.5.0         1.1.1.1
           2       External      10.10.3.0         1.1.1.1
           3       External      10.10.9.0         1.1.1.1
           4       External      10.10.4.0         1.1.1.1
           5       External      10.10.2.0         1.1.1.1
           6       External      10.10.8.0         1.1.1.1
           7       External      10.10.7.0         1.1.1.1
           8       External      10.10.6.0         1.1.1.1
           9       External      10.10.10.0        1.1.1.1
           10      External      10.10.1.0         1.1.1.1

**Table 2** Description of the **display ospf spf-statistics verbose** command output
Item	Description
Time	Date and time when route calculation occurs
Intra	Number of intra-area routes in the routing table, which are added and deleted because of route calculation.
Inter	Number of inter-area routes in the routing table, which are added and deleted because of route calculation.
External	Number of external routes in the routing table, which are added and deleted because of route calculation.
The reason of calculation is	Cause of route calculation: LSA: indicates that route calculation is caused by LSAs. Topo: indicates that route calculation is caused by topology. Other: indicates that route calculation is caused by other causes. For example, the configuration changes; or the interface goes Down.
No.	Sequence number of the LSA that causes route calculation, which ranges from 1 to 10
Type	Type of the LSA that causes route calculation, including Router, Network, Sum-Net, External, and NSSA.
LS ID	Link state ID of the LSA that causes route calculation
Adv Router	Router ID of the router that generates the LSA that causes route calculation