20-26 show ip ospf process-id database summary

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Syntax Description:

process-id ” The OSPF process ID. The range of values is 1 to 4,294,967,295.
router-id ” The OSPF router ID of the advertising router.
asbr-id ” The OSPF router ID of the ASBR.

Purpose: To display information contained in the OSPF database. An OSPF process ID can be used if more than one OSPF process is active, using the form show ip ospf process-id database. The output of this command can be filtered, using regular expressions, by one of the following forms:

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

Initial Cisco IOS Software Release: 10.0. The database-summary option was added in Release 11.0 and the adv-router and self-originate options were added in Release 12.0.

Example 1: Displaying OSPF Database Information from a Specific OSPF Router

The following is a representative output from the show ip ospf database adv-router EXEC command.

 r6#  show ip ospf database adv-router 1.1.1.1  OSPF Router with ID (6.6.6.6) (Process ID 1)                 Router Link States (Area 7) Link ID         ADV Router      Age         Seq#       Checksum Link count 1.1.1.1         1.1.1.1         431         0x80000012 0x2714   2                 Summary Net Link States (Area 7) Link ID         ADV Router      Age         Seq#       Checksum 1.1.1.1         1.1.1.1         431         0x80000010 0x29FB 2.2.2.2         1.1.1.1         431         0x80000010 0x7D63 4.4.4.4         1.1.1.1         431         0x80000010 0x8549 8.8.8.0         1.1.1.1         431         0x80000003 0x18E4 10.1.1.0        1.1.1.1         431         0x80000010 0x24BC 10.1.1.4        1.1.1.1         431         0x80000010 0x3785  10.1.1.12       1.1.1.1         431         0x80000010 0xF1A8  172.16.1.0      1.1.1.1         1198        0x80000013 0x213 172.16.2.0      1.1.1.1         431         0x80000010 0x9888                 Summary ASB Link States (Area 7) Link ID         ADV Router      Age         Seq#       Checksum 4.4.4.4         1.1.1.1         431         0x80000010 0x6D61

Table 20-3 provides an explanation for the highlighted line in the preceding output.

Table 20-3. Significant Output from the show ip ospf database adv-router Command

Field	Description
`10.1.1.12`	Indicates the route advertised by the advertising router.
`1.1.1.1`	Indicates the OSPF router ID of the advertising router.
`431`	Indicates the age of the LSA for this route.
`0x80000010`	Indicates the LSA sequence number used to detect old or duplicate LSAs.
`0xF1A8`	Indicates the LSA checksum.

Example 2: Displaying OSPF Database Information from an OSPF ASBR Router

The following is representative output from the show ip ospf database asbr-summary EXEC command.

 r6#  show ip ospf database asbr-summary  OSPF Router with ID (6.6.6.6) (Process ID 1)                 Summary ASB Link States (Area 7)   Routing Bit Set on this LSA   LS age: 1124   Options: (No TOS-capability, DC, Upward)   LS Type: Summary Links(AS Boundary Router)  Link State ID: 4.4.4.4 (AS Boundary Router address)   Advertising Router: 1.1.1.1  LS Seq Number: 80000010   Checksum: 0x6D61   Length: 28   Network Mask: /0         TOS: 0  Metric: 74

Table 20-4 provides an explanation for the highlighted lines in the preceding output.

Table 20-4. Significant Output from the show ip ospf database asbr-summary Command

Field	Description
Link State ID: 4.4.4.4 (AS Boundary Router address)	OSPF router ID of the ASBR.
`Advertising Router: 1.1.1.1`	OSPF router ID of the router advertising the LSA.

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