20-2 show ip ospf process-id

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Syntax Description:

process-id ” The OSPF process ID. The range of values is 1 to 4,294,967,295.

Purpose: To display information and parameters for one or more OSPF processes. The output of this command can be filtered, using regular expressions, by one of the following forms:

  show ip ospf   begin   regular-expression   show ip ospf   exclude   regular-expression   show ip ospf   include   regular-expression

Cisco IOS Software Initial Release: 10.0

Example: Displaying OSPF Process Information

The following is a representative output from the show ip ospf EXEC command.

r2# show ip ospf Routing Process "ospf 1" with ID 2.2.2.2 Supports only single TOS(TOS0) routes Supports opaque LSA It is an area border router SPF schedule delay 5 secs, Hold time between two SPFs 10 secs Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs Number of external LSA 1. Checksum Sum 0xAB1F Number of opaque AS LSA 0. Checksum Sum 0x0 Number of DCbitless external and opaque AS LSA 0 Number of DoNotAge external and opaque AS LSA 0 Number of areas in this router is 4. 4 normal 0 stub 0 nssa External flood list length 0 Area BACKBONE(0) Number of interfaces in this area is 3 Area has no authentication SPF algorithm executed 19 times Area ranges are Number of LSA 15. Checksum Sum 0x7A630 Number of opaque link LSA 0. Checksum Sum 0x0 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 5 Flood list length 0 Area 1 Number of interfaces in this area is 1 Area has no authentication SPF algorithm executed 10 times Area ranges are Number of LSA 22. Checksum Sum 0xD15F3 Number of opaque link LSA 0. Checksum Sum 0x0 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0 Area 2 Number of interfaces in this area is 1 Area has no authentication SPF algorithm executed 2 times Area ranges are Number of LSA 12. Checksum Sum 0x7AB94 Number of opaque link LSA 0. Checksum Sum 0x0 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0 Area 9 Number of interfaces in this area is 2 Area has no authentication SPF algorithm executed 3 times Area ranges are 8.8.8.0/27 Active(1) Advertise Number of LSA 12. Checksum Sum 0x6FB7C Number of opaque link LSA 0. Checksum Sum 0x0 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0

Table 20-1 provides an explanation for the significant lines in the preceding output.

Table 20-1. Significant Output from show ip ospf

Line	Content Description
`Routing Process "ospf 1" with ID 2.2.2.2`	The local OSPF process ID and OSPF router ID.
`It is an area border router`	OSPF router type. Possible types are Area Border Router (ABR), Autonomous System Border Router (ASBR), or internal.
SPF schedule delay 5 secs, Hold time between two SPFs 10 secs	The hold time between Shortest Path First (SPF) calculations is 10 seconds. If there is a flapping interface or a duplicate IP address in the OSPF domain, an SPF calculation will be triggered every time the router receives an update. If the number of SPF calculations (see lines 16, 27, 38, and 49) is incrementing every 10 seconds, then there is probably a flapping interface or a misconfiguration somewhere in the OSPF domain.
Number of areas in this router is 4. 4 normal 0 stub 0 nssa	Number and types of OSPF areas configured on the local router.
Area BACKBONE(0) Area 1 Area 2 Area 9	Indicates the start of the output containing information for a specific OSPF area.
`Number of interfaces in this area is 3`	Number of interfaces, either physical or loopback, that have been configured to run OSPF. The network command determines the interfaces that will be active.
`Area has no authentication`	Type of authentication configured for the area.
`SPF algorithm executed 19 times`	Number of times the SPF calculation has been run.
Area ranges are or Area ranges are 8.8.8.0/27 Active(1) Advertise	Indicates if OSPF routes are being summarized using the area range command.

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