show isis spf-log
Displays IS-IS SPF calculation information for this router.
Syntax: show isis spf-log [l1 | level-1 | l2 |level-2]
Description: Displays IS-IS SPF calculation information.
Use the show isis spf-log command to display all IS-IS SPF calculation information for this router.
Use the show isis spf-log l1 or show isis spf-log level-1 command to display Level-1 only IS-IS SPF calculation information.
Use the show isis spf-log l2 or show isis spf-log level-2 command to display Level-2 only IS-IS SPF calculation information.
Factory Default: None.
Command Mode: Executive and privileged.
Example: In the following example, the show isis spf-log command displays information about IS-IS SPFs for this router:
router#show isis spf-log
Level 1 SPR log
When Duration Nodes Count Last trigger LSP Triggers
00:01:05 0 2 1 0000.0000.0000.0000 USEMETRIC
00:12:55 0 1 1 0000.0000.0000.0000 USEMETRIC
router#
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The following table describes the fields in the display:
Table 3-9. Fields Displayed by show isis
| Field
|
Description
|
When
|
The time in hours:minutes:seconds since the last full SPF calculation occurred. The last 10 occurrences are logged
|
Duration
|
The number of milliseconds it took to complete this SPF run.
|
Nodes
|
The number of routers and pseudo nodes (LANs) that make up the topology for this SPF run.
|
Count
|
The number of events that triggered this SPF run.
|
Last trigger LSP
|
Specifies the LSP ID of the last LSP to trigger this SPF when multiple LSPs are causing the trigger.
|
Triggers
|
The following is a list of reasons that may trigger a full SPF calculation:
- MAX-PATHS - A change in the maximum ECMP paths configuration.
- USEMETRIC - A change in the metric style configuration to use for SPF.
- SENDMETRIC - A change in the metric style configuration used to build an LSP.
- OLBIL - A change in the overload bit.
- NETADD - A new system ID (via NET) was configured on this router.
- NETREM - A new system ID (via NET) was removed from this router configuration.
- NEWMETRIC - A new metric was configured on an interface for this router.
- IPBACKUP - An IP route learned by a protocol other than IS-IS disappeared. IS-IS runs a full SPF to install an IS-IS route for the IP prefix that disappeared.
- ATTACHFLAG - This router either is now attached or lost contact with the L2 backbone.
- ADMINDIST - Another administrative distance was configured for the IS-IS process on this router.
- NEWADJ - A new adjacency with another router has been created.
- NEWDR - A new DR was elected for a broadcast interface on this router.
- ADJDOWN - This router has lost its adjacency with another router.
- LINKUP - A link on this router has come up.
- LINKDOWN - A link on this router has gone down.
- NEWLSP - A new LSP has been received by this router.
- LSPEXPIRED - An LSP in the LSDB has expired.
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Related Commands: set-overload-bit
show isis
spf-interval
maximum-paths
net
router isis
