This command displays OSPF global configuration information for the specified virtual router. If no router is specified, it displays information for the default router.
| Format | show ip ospf [vrf vrf-name] |
| Mode | Privileged EXEC |
Note:
Some of the information below displays only if you enable OSPF and configure certain features.
| Term | Definition |
|---|---|
| Router ID | A 32-bit integer in dotted decimal format identifying the router, about which information is displayed. This is a configured value. |
| OSPF Admin Mode | Shows whether the administrative mode of OSPF in the router is enabled or disabled. This is a configured value. |
| RFC 1583 Compatibility | Indicates whether 1583 compatibility is enabled or disabled. This is a configured value. |
| External LSDB Limit | The maximum number of nondefault AS-external-LSA (link state advertisement) entries that can be stored in the link-state database. |
| Exit Overflow Interval | The number of seconds that, after entering overflow state, a router will attempt to leave overflow state. |
| Spf Delay Time | The number of seconds between two subsequent changes of LSAs, during which time the routing table calculation is delayed. |
| Spf Hold Time | The number of seconds between two consecutive spf calculations. |
| Flood Pacing Interval | The average time, in milliseconds, between LS Update packet transmissions on an interface. This is the value configured with the timers pacing flood command. |
| LSA Refresh Group Pacing Time | The size in seconds of the LSA refresh group window. This is the value configured with the timers pacing lsa-group command. |
| Opaque Capability | Shows whether the router is capable of sending Opaque LSAs. This is a configured value. |
| Autocost Ref BW | Shows the value of auto-cost reference bandwidth configured on the router. |
| Default Passive Setting | Shows whether the interfaces are passive by default. |
| Maximum Paths | The maximum number of paths that OSPF can report for a given destination. |
| Default Metric | Default value for redistributed routes. |
| Stub Router Configuration | When OSPF runs out of resources to store the entire link state database, or any other state information, OSPF goes into stub router mode. As a stub router, OSPF reoriginates its own router LSAs, setting the cost of all nonstub interfaces to infinity. Use this field to set stub router configuration to one of Always, Startup, None. |
| Stub Router Startup Time | Configured value in seconds. This row is only listed if OSPF is configured to be a stub router at startup. |
| Summary LSA Metric Override | One of Enabled (met), Disabled, where met is the metric to be sent in summary LSAs when in stub router mode. |
| BFD Enabled | Displays the BFD status. |
| Default Route Advertise | Indicates whether the default routes received from other source protocols are advertised or not. |
| Always | Shows whether default routes are always advertised. |
| Metric | The metric of the routes being redistributed. If the metric is not configured, this field is blank. |
| Metric Type | Shows whether the routes are External Type 1 or External Type 2. |
| Number of Active Areas | The number of active OSPF areas. An "active" OSPF area is an area with at least one interface up. |
| ABR Status | Shows whether the router is an OSPF Area Border Router. |
| ASBR Status | Reflects whether the ASBR mode is enabled or disabled. Enable implies that the router is an autonomous system border router. The router automatically becomes an ASBR when it is configured to redistribute routes learned from other protocols. The possible values for the ASBR status is enabled (if the router is configured to redistribute routes learned by other protocols) or disabled (if the router is not configured for the same). |
| Stub Router Status | One of Active, Inactive. |
| Stub Router Reason | One of Configured, Startup, Resource Limitation.
Note: The row is only listed if stub router is active.
|
| Stub Router Startup Time Remaining | The remaining time, in seconds, until OSPF exits stub router mode. This row is only listed if OSPF is in startup stub router mode. |
| Stub Router Duration | The time elapsed since the router last entered the stub router mode. The row is only listed if stub router is active and the router entered stub mode because of a resource limitation. The duration is displayed in DD:HH:MM:SS format. |
| External LSDB Overflow | When the number of nondefault external LSAs exceeds the configured limit, External LSDB Limit, OSPF goes into LSDB overflow state. In this state, OSPF withdraws all of its self-originated nondefault external LSAs. After the Exit Overflow Interval, OSPF leaves the overflow state, if the number of external LSAs has been reduced. |
| External LSA Count | The number of external (LS type 5) link-state advertisements in the link-state database. |
| External LSA Checksum | The sum of the LS checksums of external link-state advertisements contained in the link-state database. |
| AS_OPAQUE LSA Count | Shows the number of AS Opaque LSAs in the link-state database. |
| AS_OPAQUE LSA Checksum | Shows the sum of the LS Checksums of AS Opaque LSAs contained in the link-state database. |
| New LSAs Originated | The number of new link-state advertisements that have been originated. |
| LSAs Received | The number of link-state advertisements received determined to be new instantiations. |
| LSA Count | The total number of link state advertisements currently in the link state database. |
| Maximum Number of LSAs | The maximum number of LSAs that OSPF can store. |
| LSA High Water Mark | The maximum size of the link state database since the system started. |
| AS Scope LSA Flood List Length | The number of LSAs currently in the global flood queue waiting to be flooded through the OSPF domain. LSAs with AS flooding scope, such as type 5 external LSAs and type 11 Opaque LSAs. |
| Retransmit List Entries | The total number of LSAs waiting to be acknowledged by all neighbors. An LSA may be pending acknowledgment from more than one neighbor. |
| Maximum Number of Retransmit Entries | The maximum number of LSAs that can be waiting for acknowledgment at any given time. |
| Retransmit Entries High Water Mark | The maximum number of LSAs on all neighbors' retransmit lists at any given time. |
| NSF Support | Indicates whether nonstop forwarding (NSF) is enabled for the OSPF protocol for planned restarts, unplanned restarts or both ("Always"). |
| NSF Restart Interval | The user-configurable grace period during which a neighboring router will be in the helper state after receiving notice that the management unit is performing a graceful restart. |
| NSF Restart Status | The current graceful restart status of the router.
|
| NSF Restart Age | Number of seconds until the graceful restart grace period expires. |
| NSF Restart Exit Reason | Indicates why the router last exited the last restart:
|
| NSF Help Support | Indicates whether helpful neighbor functionality has been enabled for OSPF for planned restarts, unplanned restarts, or both (Always). |
| NSF help Strict LSA checking | Indicates whether strict LSA checking has been enabled. If enabled, then an OSPF helpful neighbor will exit helper mode whenever a topology change occurs. If disabled, an OSPF neighbor will continue as a helpful neighbor in spite of topology changes. |
| Prefix-suppression | Displays whether prefix-suppression is enabled or disabled. |
Example: The following shows example CLI display output for the command.
(alpha3) #show ip ospf Router ID...................................... 3.3.3.3 OSPF Admin Mode................................ Enable RFC 1583 Compatibility......................... Enable External LSDB Limit............................ No Limit Exit Overflow Interval......................... 0 Spf Delay Time................................. 5 Spf Hold Time.................................. 10 Flood Pacing Interval.......................... 33 ms LSA Refresh Group Pacing Time.................. 60 sec Opaque Capability.............................. Enable AutoCost Ref BW................................ 100 Mbps Default Passive Setting........................ Disabled Maximum Paths.................................. 4 Default Metric................................. Not configured Stub Router Configuration...................... <val> Stub Router Startup Time....................... <val> seconds Summary LSA Metric Override.................... Enabled (<met>) Default Route Advertise........................ Disabled Always......................................... FALSE Metric......................................... Not configured Metric Type.................................... External Type 2 Number of Active Areas......................... 1 (1 normal, 0 stub, 0 nssa) ABR Status..................................... Disable ASBR Status.................................... Disable Stub Router.................................... FALSE Stub Router Status............................. Inactive Stub Router Reason............................. <reason> Stub Router Startup Time Remaining............. <duration> seconds Stub Router Duration........................... <duration> External LSDB Overflow......................... FALSE External LSA Count............................. 0 External LSA Checksum.......................... 0 AS_OPAQUE LSA Count............................ 0 AS_OPAQUE LSA Checksum......................... 0 New LSAs Originated............................ 55 LSAs Received.................................. 82 LSA Count...................................... 1 Maximum Number of LSAs......................... 24200 LSA High Water Mark............................ 9 AS Scope LSA Flood List Length................. 0 Retransmit List Entries........................ 0 Maximum Number of Retransmit Entries........... 96800 Retransmit Entries High Water Mark............. 1 NSF Helper Support............................. Always NSF Helper Strict LSA Checking................. Enabled Prefix-suppression............................. Disabled
