Cisco IOS IP Routing Protocols Command Reference
OSPF Commands: show ip ospf through T
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Table Of Contents

show ip ospf

show ip ospf border-routers

show ip ospf database

show ip ospf flood-list

show ip ospf interface

show ip ospf neighbor

show ip ospf request-list

show ip ospf retransmission-list

show ip ospf rib

show ip ospf sham-links

show ip ospf statistics

show ip ospf summary-address

show ip ospf timers rate-limit

show ip ospf traffic

show ip ospf virtual-links

show ipv6 ospf traffic

shutdown (router ospf)

snmp-server enable traps ospf

snmp-server enable traps ospf cisco-specific errors

snmp-server enable traps ospf cisco-specific errors config-error

snmp-server enable traps ospf cisco-specific errors shamlink

snmp-server enable traps ospf cisco-specific lsa

snmp-server enable traps ospf cisco-specific retransmit

snmp-server enable traps ospf cisco-specific state-change

snmp-server enable traps ospf errors

snmp-server enable traps ospf lsa

snmp-server enable traps ospf rate-limit

snmp-server enable traps ospf retransmit

snmp-server enable traps ospf state-change

summary-address (OSPF)

timers lsa arrival

timers pacing flood

timers pacing lsa-group

timers pacing retransmission

timers throttle lsa all

timers throttle spf

ttl-security all-interfaces


show ip ospf

To display general information about Open Shortest Path First (OSPF) routing processes, use the show ip ospf command in user EXEC or privileged EXEC mode.

show ip ospf [process-id]

Syntax Description

process-id

(Optional) Process ID. If this argument is included, only information for the specified routing process is included.


Command Modes

User EXEC
Privileged EXEC

Command History

Mainline Release
Modification

10.0

This command was introduced.

0S Release
Modification

12.0(25)S

This command was integrated into Cisco IOS Release 12.0(25)S and the output was expanded to display link-state advertisement (LSA) throttling timers.

12.0(31)S

Support for the BFD feature was added.

S Release
Modification

12.2(14)S

Support for displaying packet pacing timers was integrated into Cisco IOS Release 12.2(14)S.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

12.2(18)SXE

This command was integrated into Cisco IOS Release 12.2(18)SXE and support for the Bidirectional Forwarding Detection (BFD) feature was added.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2(33)SB

This command was modified to show additional information if BFD for OSPF is enabled.

T Release
Modification

12.2(4)T

This command was modified to show packet pacing timers in the displayed output.

12.2(15)T

This command was modified to show additional information if the OSPF Forwarding Address Suppression in Type-5 LSAs feature is configured.

12.3(2)T

The output of this command was expanded to display LSA throttling timers and the limit on redistributed routes.

12.4(4)T

Support for the BFD feature was added.


Examples

The following is sample output from the show ip ospf command when entered without a specific OSPF process ID: 

Router# show ip ospf 


  Routing Process "ospf 201" with ID 10.0.0.1 and Domain ID 10.20.0.1 

  Supports only single TOS(TOS0) routes 

  Supports opaque LSA 

  SPF schedule delay 5 secs, Hold time between two SPFs 10 secs 

  Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs 

  LSA group pacing timer 100 secs 

  Interface flood pacing timer 55 msecs 

  Retransmission pacing timer 100 msecs 

  Number of external LSA 0. Checksum Sum 0x0      

  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 2. 2 normal 0 stub 0 nssa 

  External flood list length 0 

     Area BACKBONE(0) 

         Number of interfaces in this area is 2 

         Area has message digest authentication 

         SPF algorithm executed 4 times 

         Area ranges are 

         Number of LSA 4. Checksum Sum 0x29BEB  

         Number of opaque link LSA 0. Checksum Sum 0x0      

         Number of DCbitless LSA 3 

         Number of indication LSA 0 

         Number of DoNotAge LSA 0 

         Flood list length 0 

     Area 172.16.26.0 

         Number of interfaces in this area is 0 

         Area has no authentication 

         SPF algorithm executed 1 times 

         Area ranges are 

            192.168.0.0/16 Passive Advertise  

         Number of LSA 1. Checksum Sum 0x44FD   

         Number of opaque link LSA 0. Checksum Sum 0x0      

         Number of DCbitless LSA 1 

         Number of indication LSA 1 

         Number of DoNotAge LSA 0 

         Flood list length 0

Cisco IOS Release 12.2(18)SXE, 12.0(31)S, and 12.4(4)T

The following is sample output from the show ip ospf command to verify that the BFD feature has been enabled for OSPF process 123. The relevant command output is shown in bold in the output. 

Router# show ip ospf 


 Routing Process "ospf 123" with ID 172.16.10.1

 Supports only single TOS(TOS0) routes

 Supports opaque LSA

 Supports Link-local Signaling (LLS)

 Initial SPF schedule delay 5000 msecs

 Minimum hold time between two consecutive SPFs 10000 msecs

 Maximum wait time between two consecutive SPFs 10000 msecs

 Incremental-SPF disabled

 Minimum LSA interval 5 secs

 Minimum LSA arrival 1000 msecs

 LSA group pacing timer 240 secs

 Interface flood pacing timer 33 msecs

 Retransmission pacing timer 66 msecs

 Number of external LSA 0. Checksum Sum 0x000000

 Number of opaque AS LSA 0. Checksum Sum 0x000000

 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 1. 1 normal 0 stub 0 nssa

 External flood list length 0

   BFD is enabled

    Area BACKBONE(0)

        Number of interfaces in this area is 2

        Area has no authentication

        SPF algorithm last executed 00:00:03.708 ago

        SPF algorithm executed 27 times

        Area ranges are

        Number of LSA 3. Checksum Sum 0x00AEF1

        Number of opaque link LSA 0. Checksum Sum 0x000000

        Number of DCbitless LSA 0

        Number of indication LSA 0

        Number of DoNotAge LSA 0

        Flood list length 0

Table 91 describes the significant fields shown in the display.

Table 91 show ip ospf Field Descriptions 

Field
Description

Routing process "ospf 201" with ID 10.0.0.1

Process ID and OSPF router ID.

Supports...

Number of types of service supported (Type 0 only).

SPF schedule delay

Delay time of SPF calculations.

Minimum LSA interval

Minimum interval between link-state advertisements.

LSA group pacing timer

Configured LSA group pacing timer (in seconds).

Interface flood pacing timer

Configured LSA flood pacing timer (in milliseconds).

Retransmission pacing timer

Configured LSA retransmission pacing timer (in milliseconds).

Number of external LSA

Number of external link-state advertisements.

Number of opaque AS LSA

Number of opaque link-state advertisements.

Number of DCbitless external and opaque AS LSA

Number of demand circuit external and opaque link-state advertisements.

Number of DoNotAge external and opaque AS LSA

Number of do not age external and opaque link-state advertisements.

Number of areas in this router is

Number of areas configured for the router.

External flood list length

External flood list length.

BFD is enabled

BFD has been enabled on the OSPF process.


The following is an excerpt of output from the show ip ospf command when the OSPF Forwarding Address Suppression in Type-5 LSAs feature is configured: 

Router# show ip ospf

.

.

.

Area 2

   Number of interfaces in this area is 4

   It is a NSSA area

   Perform type-7/type-5 LSA translation, suppress forwarding address

.

.

.

Routing Process "ospf 1" with ID 192.168.0.1

 Supports only single TOS(TOS0) routes

 Supports opaque LSA

 Supports Link-local Signaling (LLS)

 Initial SPF schedule delay 5000 msecs

 Minimum hold time between two consecutive SPFs 10000 msecs

 Maximum wait time between two consecutive SPFs 10000 msecs

 Incremental-SPF disabled

 Minimum LSA interval 5 secs

 Minimum LSA arrival 1000 msecs

 LSA group pacing timer 240 secs

 Interface flood pacing timer 33 msecs

 Retransmission pacing timer 66 msecs

 Number of external LSA 0. Checksum Sum 0x0     

 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 0. 0 normal 0 stub 0 nssa

 External flood list length 0

Table 92 describes the significant fields shown in the display.

Table 92 show ip ospf Field Descriptions 

Field
Description

Area

OSPF area and tag.

Number of interfaces...

Number of interfaces configured in the area.

It is...

Possible types are internal, area border, or autonomous system boundary.

Routing process "ospf 1" with ID 192.168.0.1

Process ID and OSPF router ID.

Supports...

Number of types of service supported (Type 0 only).

Initial SPF schedule delay

Delay time of SPF calculations at startup.

Minimum hold time

Minimum hold time between consecutive SPF calculations.

Maximum wait time

Maximum wait time between consecutive SPF calculations.

Incremental-SPF

Status of incremental SPF calculations.

Minimum LSA...

Minimum time interval (in seconds) between link-state advertisements, and maximum arrival time (in milliseconds) of link-state advertisements,

LSA group pacing timer

Configured LSA group pacing timer (in seconds).

Interface flood pacing timer

Configured LSA flood pacing timer (in milliseconds).

Retransmission pacing timer

Configured LSA retransmission pacing timer (in milliseconds).

Number of...

Number and type of link-state advertisements that have been received.

Number of external LSA

Number of external link-state advertisements.

Number of opaque AS LSA

Number of opaque link-state advertisements.

Number of DCbitless external and opaque AS LSA

Number of demand circuit external and opaque link-state advertisements.

Number of DoNotAge external and opaque AS LSA

Number of do not age external and opaque link-state advertisements.

Number of areas in this router is

Number of areas configured for the router listed by type.

External flood list length

External flood list length.


The following is sample output from the show ip ospf command. In this example, the user had configured the redistribution maximum-prefix command to set a limit of 2000 redistributed routes. Shortest Path First (SPF) throttling was configured with the timers throttle spf command. 

Router# show ip ospf 1


 Routing Process "ospf 1" with ID 10.0.0.1

 Supports only single TOS(TOS0) routes

 Supports opaque LSA

 Supports Link-local Signaling (LLS)

 It is an autonomous system boundary router

 Redistributing External Routes from,

    static, includes subnets in redistribution

    Maximum limit of redistributed prefixes 2000

    Threshold for warning message 75%

Initial SPF schedule delay 5000 msecs

 Minimum hold time between two consecutive SPFs 10000 msecs

Maximum wait time between two consecutive SPFs 10000 msecs

Table 93 describes the significant fields shown in the display.

Table 93 show ip ospf Field Descriptions 

Field
Description

Routing process "ospf 1" with ID 10.0.0.1

Process ID and OSPF router ID.

Supports ...

Number of Types of Service (TOS) supported.

It is ...

Possible types are internal, area border, or autonomous system boundary.

Redistributing External Routes from

Lists of redistributed routes, by protocol.

Maximum limit of redistributed prefixes

Value set in the redistribution maximum-prefix command to set a limit on the number of redistributed routes.

Threshold for warning message

Percentage set in the redistribution maximum-prefix command for the threshold number of redistributed routes needed to cause a warning message. The default is 75 percent of the maximum limit.

Initial SPF schedule delay

Delay (in milliseconds) before initial SPF schedule for SPF throttling. Configured with the timers throttle spf command.

Minimum hold time between two consecutive SPFs

Minimum hold time (in milliseconds) between two consecutive SPF calculations for SPF throttling. Configured with the timers throttle spf command.

Maximum wait time between two consecutive SPFs

Maximum wait time (in milliseconds) between two consecutive SPF calculations for SPF throttling. Configured with the timers throttle spf command.

Number of areas

Number of areas in router, area addresses, and so on.


The following is sample output from the show ip ospf command. In this example, the user had configured LSA throttling, and those lines of output are displayed in bold. 

Router# show ip ospf 1


Routing Process "ospf 4" with ID 10.10.24.4

 Supports only single TOS(TOS0) routes

 Supports opaque LSA

 Supports Link-local Signaling (LLS)

 Initial SPF schedule delay 5000 msecs

 Minimum hold time between two consecutive SPFs 10000 msecs

 Maximum wait time between two consecutive SPFs 10000 msecs

 Incremental-SPF disabled

 Initial LSA throttle delay 100 msecs

 Minimum hold time for LSA throttle 10000 msecs

 Maximum wait time for LSA throttle 45000 msecs

Minimum LSA arrival 1000 msecs

 LSA group pacing timer 240 secs

 Interface flood pacing timer 33 msecs

 Retransmission pacing timer 66 msecs

 Number of external LSA 0. Checksum Sum 0x0     

 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 1. 1 normal 0 stub 0 nssa

 External flood list length 0

    Area 24

        Number of interfaces in this area is 2

        Area has no authentication

        SPF algorithm last executed 04:28:18.396 ago

        SPF algorithm executed 8 times

        Area ranges are

        Number of LSA 4. Checksum Sum 0x23EB9 

        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

The following is sample show ip ospf command. In this example, the user had configured the redistribution maximum-prefix command to set a limit of 2000 redistributed routes. SPF throttling was configured with the timers throttle spf command. 

Router# show ip ospf 1


 Routing Process "ospf 1" with ID 192.168.0.0

 Supports only single TOS(TOS0) routes

 Supports opaque LSA

 Supports Link-local Signaling (LLS)

 It is an autonomous system boundary router

 Redistributing External Routes from,

    static, includes subnets in redistribution

    Maximum limit of redistributed prefixes 2000

    Threshold for warning message 75%

Initial SPF schedule delay 5000 msecs

 Minimum hold time between two consecutive SPFs 10000 msecs

 Maximum wait time between two consecutive SPFs 10000 msecs

Table 94 describes the significant fields shown in the display.

Table 94 show ip ospf Field Descriptions 

Field
Description

Routing process "ospf 1" with ID 192.168.0.0.

Process ID and OSPF router ID.

Supports ...

Number of TOS supported.

It is ...

Possible types are internal, area border, or autonomous system boundary.

Redistributing External Routes from

Lists of redistributed routes, by protocol.

Maximum limit of redistributed prefixes

Value set in the redistribution maximum-prefix command to set a limit on the number of redistributed routes.

Threshold for warning message

Percentage set in the redistribution maximum-prefix command for the threshold number of redistributed routes needed to cause a warning message. The default is 75 percent of the maximum limit.

Initial SPF schedule delay

Delay (in milliseconds) before the initial SPF schedule for SPF throttling. Configured with the timers throttle spf command.

Minimum hold time between two consecutive SPFs

Minimum hold time (in milliseconds) between two consecutive SPF calculations for SPF throttling. Configured with the timers throttle spf command.

Maximum wait time between two consecutive SPFs

Maximum wait time (in milliseconds) between two consecutive SPF calculations for SPF throttling. Configured with the timers throttle spf command.

Number of areas

Number of areas in router, area addresses, and so on.


The following is sample output from the show ip ospf command. In this example, the user had configured LSA throttling, and those lines of output are displayed in bold. 

Router# show ip ospf 1


Routing Process "ospf 4" with ID 10.10.24.4

 Supports only single TOS(TOS0) routes

 Supports opaque LSA

 Supports Link-local Signaling (LLS)

 Initial SPF schedule delay 5000 msecs

 Minimum hold time between two consecutive SPFs 10000 msecs

 Maximum wait time between two consecutive SPFs 10000 msecs

 Incremental-SPF disabled

 Initial LSA throttle delay 100 msecs

 Minimum hold time for LSA throttle 10000 msecs

 Maximum wait time for LSA throttle 45000 msecs

Minimum LSA arrival 1000 msecs

 LSA group pacing timer 240 secs

 Interface flood pacing timer 33 msecs

 Retransmission pacing timer 66 msecs

 Number of external LSA 0. Checksum Sum 0x0     

 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 1. 1 normal 0 stub 0 nssa

 External flood list length 0

    Area 24

        Number of interfaces in this area is 2

        Area has no authentication

        SPF algorithm last executed 04:28:18.396 ago

        SPF algorithm executed 8 times

        Area ranges are

        Number of LSA 4. Checksum Sum 0x23EB9 

        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

show ip ospf border-routers

To display the internal Open Shortest Path First (OSPF) routing table entries to an Area Border Router (ABR) and Autonomous System Boundary Router (ASBR), use the show ip ospf border-routers command in privileged EXEC mode.

show ip ospf border-routers

Syntax Description

This command has no arguments or keywords.

Command Modes

Privileged EXEC

Command History

Release
Modification

10.0

This command was introduced.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.


Examples

The following is sample output from the show ip ospf border-routers command: 

Router# show ip ospf border-routers


OSPF Process 109 internal Routing Table


Codes:  i - Intra-area route, I - Inter-area route


i 192.168.97.53   [10] via 172.16.1.53,   Serial0, ABR,  Area 0.0.0.3, SPF 3

i 192.168.103.51  [10] via 192.168.96.51, Serial0, ABR,  Area 0.0.0.3, SPF 3

I 192.168.103.52  [22] via 192.168.96.51, Serial0, ASBR, Area 0.0.0.3, SPF 3

I 192.168.103.52  [22] via 172.16.1.53,   Serial0, ASBR, Area 0.0.0.3, SPF 3

Table 95 describes the significant fields shown in the display.

Table 95 show ip ospf border-routers Field Descriptions 

Field
Description

192.168.97.53

Router ID of the destination.

[10]

Cost of using this route.

via 172.16.1.53

Next hop toward the destination.

Serial0

Interface type for the outgoing interface.

ABR

The router type of the destination; it is either an ABR or ASBR or both.

Area

The area ID of the area from which this route is learned.

SPF 3

The internal number of the shortest path first (SPF) calculation that installs this route.


show ip ospf database

To display lists of information related to the Open Shortest Path First (OSPF) database for a specific router, use the show ip ospf database command in EXEC mode.

show ip ospf [process-id area-id] database

show ip ospf [process-id area-id] database [adv-router [ip-address]]

show ip ospf [process-id area-id] database [asbr-summary] [link-state-id]

show ip ospf [process-id area-id] database [asbr-summary] [link-state-id] [adv-router
[ip-address]]

show ip ospf [process-id area-id] database [asbr-summary] [link-state-id] [self-originate]
[link-state-id]

show ip ospf [process-id area-id] database [database-summary]

show ip ospf [process-id] database [external] [link-state-id]

show ip ospf [process-id] database [external] [link-state-id] [adv-router [ip-address]]

show ip ospf [process-id area-id] database [external] [link-state-id] [self-originate]
[link-state-id]

show ip ospf [process-id area-id] database [network] [link-state-id]

show ip ospf [process-id area-id] database [network] [link-state-id] [adv-router [ip-address]]

show ip ospf [process-id area-id] database [network] [link-state-id] [self-originate]
[link-state-id]

show ip ospf [process-id area-id] database [nssa-external] [link-state-id]

show ip ospf [process-id area-id] database [nssa-external] [link-state-id] [adv-router
[ip-address]]

show ip ospf [process-id area-id] database [nssa-external] [link-state-id] [self-originate]
[link-state-id]

show ip ospf [process-id area-id] database [router] [link-state-id]

show ip ospf [process-id area-id] database [router] [adv-router [ip-address]]

show ip ospf [process-id area-id] database [router] [self-originate] [link-state-id]

show ip ospf [process-id area-id] database [self-originate] [link-state-id]

show ip ospf [process-id area-id] database [summary] [link-state-id]

show ip ospf [process-id area-id] database [summary] [link-state-id] [adv-router [ip-address]]

show ip ospf [process-id area-id] database [summary] [link-state-id] [self-originate]
[link-state-id]

Syntax Description

process-id

(Optional) Internal identification. It is locally assigned and can be any positive integer. The number used here is the number assigned administratively when enabling the OSPF routing process.

area-id

(Optional) Area number associated with the OSPF address range defined in the network router configuration command used to define the particular area.

adv-router [ip-address]

(Optional) Displays all the LSAs of the specified router. If no IP address is included, the information is about the local router itself (in this case, the same as self-originate).

link-state-id

(Optional) Portion of the Internet environment that is being described by the advertisement. The value entered depends on the advertisement's LS type. It must be entered in the form of an IP address.

When the link state advertisement is describing a network, the link-state-id can take one of two forms:

The network's IP address (as in type 3 summary link advertisements and in autonomous system external link advertisements).

A derived address obtained from the link state ID. (Note that masking a network links advertisement's link state ID with the network's subnet mask yields the network's IP address.)

When the link state advertisement is describing a router, the link state ID is always the described router's OSPF router ID.

When an autonomous system external advertisement (LS Type = 5) is describing a default route, its link state ID is set to Default Destination (0.0.0.0).

asbr-summary

(Optional) Displays information only about the autonomous system boundary router summary LSAs.

database-summary

(Optional) Displays how many of each type of LSA for each area there are in the database, and the total.

external

(Optional) Displays information only about the external LSAs.

network

(Optional) Displays information only about the network LSAs.

nssa-external

(Optional) Displays information only about the NSSA external LSAs.

router

(Optional) Displays information only about the router LSAs.

self-originate

(Optional) Displays only self-originated LSAs (from the local router).

summary

(Optional) Displays information only about the summary LSAs.


Command Modes

EXEC

Command History

Release
Modification

10.0

This command was introduced.

11.0

The database-summary keyword was added.

12.0

The following keywords were added:

•self-originate

•adv-router

12.0(25)S

The output of the show ip ospf database database-summary command was increased to include Self-originated Type-7 and Self-originated Type-5 output.

12.2(27)SBC

This command was integrated into Cisco IOS Release 12.2(27)SBC.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.


Usage Guidelines

The various forms of this command deliver information about different OSPF link state advertisements.

Examples

The following is sample output from the show ip ospf database command when no arguments or keywords are used: 

Router# show ip ospf database


OSPF Router with id(192.168.239.66) (Process ID 300)


                 Displaying Router Link States(Area 0.0.0.0)


  Link ID       ADV Router    Age        Seq#     Checksum  Link count

172.16.21.6   172.16.21.6    1731    0x80002CFB    0x69BC       8

172.16.21.5   172.16.21.5    1112    0x800009D2    0xA2B8       5

172.16.1.2    172.16.1.2     1662    0x80000A98    0x4CB6       9

172.16.1.1    172.16.1.1     1115    0x800009B6    0x5F2C       1

172.16.1.5    172.16.1.5     1691    0x80002BC     0x2A1A       5

172.16.65.6   172.16.65.6    1395    0x80001947    0xEEE1       4

172.16.241.5  172.16.241.5   1161    0x8000007C    0x7C70       1

172.16.27.6   172.16.27.6    1723    0x80000548    0x8641       4

172.16.70.6   172.16.70.6    1485    0x80000B97    0xEB84       6


                Displaying Net Link States(Area 0.0.0.0)


  Link ID       ADV Router      Age        Seq#        Checksum

172.16.1.3  192.168.239.66     1245    0x800000EC      0x82E


                Displaying Summary Net Link States(Area 0.0.0.0)


  Link ID       ADV Router       Age        Seq#        Checksum

172.16.240.0   172.16.241.5    1152      0x80000077      0x7A05

172.16.241.0   172.16.241.5    1152      0x80000070      0xAEB7

172.16.244.0   172.16.241.5    1152      0x80000071      0x95CB

Table 96 describes the significant fields shown in the display.

Table 96 show ip ospf Database Field Descriptions 

Field
Description

Link ID

Router ID number.

ADV Router

Advertising router's ID.

Age

Link state age.

Seq#

Link state sequence number (detects old or duplicate link state advertisements).

Checksum

Fletcher checksum of the complete contents of the link state advertisement.

Link count

Number of interfaces detected for router.


The following is sample output from the show ip ospf database command with the asbr-summary keyword: 

Router# show ip ospf database asbr-summary


OSPF Router with id(192.168.239.66) (Process ID 300)


                Displaying Summary ASB Link States(Area 0.0.0.0)


	LS age: 1463

	Options: (No TOS-capability)

	LS Type: Summary Links(AS Boundary Router)

	Link State ID: 172.16.245.1 (AS Boundary Router address)

	Advertising Router: 172.16.241.5

	LS Seq Number: 80000072

	Checksum: 0x3548

	Length: 28

	Network Mask: 0.0.0.0 TOS: 0  Metric: 1

Table 97 describes the significant fields shown in the display.

Table 97 show ip ospf database asbr-summary Field Descriptions 

Field
Description

OSPF Router with id

Router ID number.

Process ID

OSPF process ID.

LS age

Link state age.

Options

Type of service options (Type 0 only).

LS Type

Link state type.

Link State ID

Link state ID (autonomous system boundary router).

Advertising Router

Advertising router's ID.

LS Seq Number

Link state sequence (detects old or duplicate link state advertisements).

Checksum

LS checksum (Fletcher checksum of the complete contents of the link state advertisement).

Length

Length in bytes of the link state advertisement.

Network Mask

Network mask implemented.

TOS

Type of service.

Metric

Link state metric.


The following is sample output from the show ip ospf database command with the external keyword: 

Router# show ip ospf database external


OSPF Router with id(192.168.239.66) (Autonomous system 300)


                   Displaying AS External Link States


LS age: 280

Options: (No TOS-capability)

LS Type: AS External Link

Link State ID: 10.105.0.0 (External Network Number)

Advertising Router: 172.16.70.6

LS Seq Number: 80000AFD

Checksum: 0xC3A

Length: 36

Network Mask: 255.255.0.0

     		Metric Type: 2 (Larger than any link state path)

     		TOS: 0

     		Metric: 1

     		Forward Address: 0.0.0.0

     		External Route Tag: 0

Table 98 describes the significant fields shown in the display.

Table 98 show ip ospf database external Field Descriptions 

Field
Description

OSPF Router with id

Router ID number.

Autonomous system

OSPF autonomous system number (OSPF process ID).

LS age

Link state age.

Options

Type of service options (Type 0 only).

LS Type

Link state type.

Link State ID

Link state ID (external network number).

Advertising Router

Advertising router's ID.

LS Seq Number

Link state sequence number (detects old or duplicate link state advertisements).

Checksum

LS checksum (Fletcher checksum of the complete contents of the LSA).

Length

Length in bytes of the link state advertisement.

Network Mask

Network mask implemented.

  Metric Type

External Type.

  TOS

Type of service.

  Metric

Link state metric.

  Forward Address

Forwarding address. Data traffic for the advertised destination will be forwarded to this address. If the forwarding address is set to 0.0.0.0, data traffic will be forwarded instead to the advertisement's originator.

  External Route Tag

External route tag, a 32-bit field attached to each external route. This is not used by the OSPF protocol itself.


The following is sample output from the show ip ospf database command with the network keyword: 

Router# show ip ospf database network


 OSPF Router with id(192.168.239.66) (Process ID 300)


                Displaying Net Link States(Area 0.0.0.0)


LS age: 1367

Options: (No TOS-capability)

LS Type: Network Links

Link State ID: 172.16.1.3 (address of Designated Router)

Advertising Router: 192.168.239.66

LS Seq Number: 800000E7

Checksum: 0x1229

Length: 52

Network Mask: 255.255.255.0

        Attached Router: 192.168.239.66

        Attached Router: 172.16.241.5

        Attached Router: 172.16.1.1

        Attached Router: 172.16.54.5

        Attached Router: 172.16.1.5

Table 99 describes the significant fields shown in the display.

Table 99 show ip ospf database network Field Descriptions 

Field
Description

OSPF Router with id

Router ID number.

Process ID 300

OSPF process ID.

LS age

Link state age.

Options

Type of service options (Type 0 only).

LS Type:

Link state type.

Link State ID

Link state ID of designated router.

Advertising Router

Advertising router's ID.

LS Seq Number

Link state sequence (detects old or duplicate link state advertisements).

Checksum

LS checksum (Fletcher checksum of the complete contents of the link state advertisement).

Length

Length in bytes of the link state advertisement.

Network Mask

Network mask implemented.

AS Boundary Router

Definition of router type.

Attached Router

List of routers attached to the network, by IP address.


The following is sample output from the show ip ospf database command with the router keyword: 

Router# show ip ospf database router


OSPF Router with id(192.168.239.66) (Process ID 300)


Displaying Router Link States(Area 0.0.0.0)


LS age: 1176

Options: (No TOS-capability)

LS Type: Router Links

Link State ID: 172.16.21.6

Advertising Router: 172.16.21.6

LS Seq Number: 80002CF6

Checksum: 0x73B7

Length: 120

AS Boundary Router

155   Number of Links: 8


Link connected to: another Router (point-to-point)

(link ID) Neighboring Router ID: 172.16.21.5

(Link Data) Router Interface address: 172.16.21.6

Number of TOS metrics: 0

TOS 0 Metrics: 2

Table 100 describes the significant fields shown in the display.

Table 100 show ip ospf database router Field Descriptions 

Field
Description

OSPF Router with id

Router ID number.

Process ID

OSPF process ID.

LS age

Link state age.

Options

Type of service options (Type 0 only).

LS Type

Link state type.

Link State ID

Link state ID.

Advertising Router

Advertising router's ID.

LS Seq Number

Link state sequence (detects old or duplicate link state advertisements).

Checksum

LS checksum (Fletcher checksum of the complete contents of the link state advertisement).

Length

Length in bytes of the link state advertisement.

AS Boundary Router

Definition of router type.

Number of Links

Number of active links.

link ID

Link type.

Link Data

Router interface address.

TOS

Type of service metric (Type 0 only).


The following is sample output from show ip ospf database command with the summary keyword: 

Router# show ip ospf database summary


       OSPF Router with id(192.168.239.66) (Process ID 300)


                Displaying Summary Net Link States(Area 0.0.0.0)


LS age: 1401

Options: (No TOS-capability)

LS Type: Summary Links(Network)

Link State ID: 172.16.240.0 (summary Network Number)

Advertising Router: 172.16.241.5

LS Seq Number: 80000072

Checksum: 0x84FF

Length: 28

Network Mask: 255.255.255.0   TOS: 0  Metric: 1

Table 101 describes the significant fields shown in the display.

Table 101 show ip ospf database summary Field Descriptions 

Field
Description

OSPF Router with id

Router ID number.

Process ID

OSPF process ID.

LS age

Link state age.

Options

Type of service options (Type 0 only).

LS Type

Link state type.

Link State ID

Link state ID (summary network number).

Advertising Router

Advertising router's ID.

LS Seq Number

Link state sequence (detects old or duplicate link state advertisements).

Checksum

LS checksum (Fletcher checksum of the complete contents of the link state advertisement).

Length

Length in bytes of the link state advertisement.

Network Mask

Network mask implemented.

TOS

Type of service.

Metric

Link state metric.


The following is sample output from show ip ospf database command with the database-summary keyword: 

Router# show ip ospf database database-summary


OSPF Router with ID (10.0.0.1) (Process ID 1)


Area 0 database summary

  LSA Type      Count    Delete   Maxage

  Router        3        0        0

  Network       0        0        0

  Summary Net   0        0        0

  Summary ASBR  0        0        0

  Type-7 Ext    0        0        0

    Self-originated Type-7  0

Opaque Link     0        0        0

  Opaque Area   0        0        0

  Subtotal      3        0        0


Process 1 database summary

  LSA Type      Count    Delete   Maxage

  Router        3        0        0

  Network       0        0        0

  Summary Net   0        0        0

  Summary ASBR  0        0        0

  Type-7 Ext    0        0        0

  Opaque Link   0        0        0

  Opaque Area   0        0        0

  Type-5 Ext    0        0        0

      Self-originated Type-5  200

Opaque AS       0        0        0

  Total       203        0        0

Table 102 describes the significant fields shown in the display.

Table 102 show ip ospf database database-summary Field Descriptions 

Field
Description

Area 0 database summary

Area number.

Count

Count of LSAs of the type identified in the first column.

Router

Number of router link state advertisements in that area.

Network

Number of network link state advertisements in that area.