20-2 show ip ospf
process-id
Syntax Description:
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.
|
|
