display isis spf-log (All views)
Parameters
| Parameter | Description | Value |
|---|---|---|
| process-id |
Specifies an IS-IS process ID. |
The value is an integer ranging from 1 to 4294967295. |
| spf |
Indicates the SPF calculation log. |
- |
| ipv6 |
Indicates the SPF calculation log in the IPv6 topology. |
- |
| topology topology-name |
Specifies the name of a topology instance. |
The value is a string of 1 to 31 case-sensitive characters without spaces. The value must start with a letter (a to z or A to Z, case sensitive) and can contain numbers, hyphens (-), or underlines (_). When double quotation marks are used around the string, spaces are allowed in the string. |
| level-1 |
Indicates the SPF calculation log in a Level-1 area. |
- |
| level-2 |
Indicates the SPF calculation log in a Level-2 area. |
- |
| prc |
Indicates the PRC calculation log. |
- |
Usage Guidelines
Usage Scenario
When an error occurs in the IS-IS SPF or PRC calculation, run the display isis spf-log command to diagnose the fault. The command can be used to view the SPF calculation log of IS-IS, such as the start time, duration, number of nodes, and events that trigger the SPF calculation. You can check which event causes the error of the SPF or PRC calculation by the start time.
Check the StartTime field first. If the SPF or PRC calculation is performed repeatedly at short intervals, flapping may have occurred. Then check the Last Trigger LSP and Trigger Event fields for further analysis.Example
The actual command output varies according to the device. The command output here is only an example.
<HUAWEI> display isis spf-log prc
SPF Log information for ISIS(1)
-------------------------------
ISIS(1) PRC Log
-----------------------
StartTime Duration Routes Count Last Trigger LSP Trigger Event
-------------------------------------------------------------------------------
2019-08-10 0 2 3 NULL ICRM_SC_FULL_CALC
08:28:31.50
8
2019-08-10 0 1 1 NULL ICRM_SC_PREFIX
08:26:34.59
6
2019-08-10 0 1 1 NULL ICRM_SC_PREFIX
08:25:36.80
2
2019-08-10 1 1 1 NULL ICRM_SC_PREFIX
08:25:09.35
1
2019-08-10 0 1 1 NULL ICRM_SC_PREFIX
08:13:53.47
8
2019-08-10 0 0 2 NULL ICRM_SC_FRR_NODE
08:13:14.04
3
2019-08-10 1 2 3 NULL ICRM_SC_FULL_CALC
08:13:12.25
1
2019-08-10 0 1 1 NULL ICRM_SC_PREFIX
08:05:21.39
8
2019-08-10 0 2 2 NULL ICRM_SC_PREFIX
07:25:05.55
7
2019-08-10 0 0 1 NULL ICRM_SC_AREA
07:22:54.02
7
2019-08-10 0 1 1 NULL ICRM_SC_PREFIX
02:19:58.36
2
2019-08-10 0 0 2 NULL ICRM_SC_STALE_SPT
02:09:04.94
6
2019-08-10 0 0 3 NULL ICRM_SC_AREA
02:09:03.91
0
<HUAWEI> display isis spf-log spf level-1
SPF Log information for ISIS(1)
-------------------------------
ISIS(1) Level-1 SPF Log
-----------------------
StartTime Duration Nodes Count Last Trigger LSP Trigger Event
-------------------------------------------------------------------------------
2019-08-10 0 2 3 NULL L1_ISPT_ADJ_NEXTHOP_C
07:52:52.51 HANGE
5
| Item | Description |
|---|---|
| StartTime | Start time for SPF calculation. |
| Duration | Time taken for SPF calculation, the value rounds down the actual duration, in milliseconds. In most cases, the value is less than 1 ms. Therefore, it is displayed as 0. |
| Count | Number of events triggering the SPF calculation. |
| Last Trigger LSP | LSP that triggers the last SPF calculation. |
| Trigger Event | Event that triggers the last SPF calculation. |
| Nodes | Number of nodes calculated by SPF. |