# Monitoring the Redundancy History of Line Modules in a Specific Slot

#### Purpose

Display information about dates, times, and the number of occurrences for starts and switchovers for a line module installed in a particular slot.

#### Action

To display information about the number of occurrences for starts and switchovers for a particular line module:

    host1#show redundancy history line-card slot 3
            system            last               last                        Number           Number
            up                cold               warm                        of cold          of  warm
    slot    time              switchover         switchover                  switchovers      switchovers
    ----   --------           ---------          -------                     ------           -------
    3      00:32:09      2009-06-10 17:56:15   2009-06-01 17:56:15            8                  2

To display additional redundancy history information:

    host1#show redundancy history line-card slot 3 detail

    Line card
    –------------
            system            last               last                        Number           Number
            up                cold               warm                        of cold          of  warm
    slot    time              switchover         switchover                  switchovers      switchovers
    ----   --------           ---------          -------                     ------           -------
    3      00:32:09      2009-06-10 17:56:15   2009-06-01 17:56:15            8                  2

    LC activation time      type       slot     uptime
    -------------------   -----------   ----   ----------
    2009-06-10 19:20:35   warm-switch    03    0 20:20:40
    2009-06-10 18:58:23   warm-switch    03    0 19:58:28
    2009-06-10 18:39:54   warm-switch    03    0 19:39:59
    2009-06-10 18:20:10   warm-switch    03    0 19:20:15
    2009-06-10 18:00:46   warm-switch    03    0 19:00:50
    2009-06-10 17:41:13   warm-switch    03    0 18:41:17
    2009-06-10 17:12:03   warm-switch    03    0 18:12:08
    2009-06-10 16:47:21   warm-switch    03    0 17:47:23
    2009-06-10 16:26:59   warm-switch    03    0 17:27:00
    2009-06-10 15:54:12   warm-switch    03    0 16:54:12
    2009-06-10 15:31:57   warm-switch    03    0 16:31:57

#### Meaning

Table 17 lists the show redundancy history line-card slot slotNum command output fields.

Table 17: show redundancy history line-card slot slotNum Output Fields

Field Name | Field Description
--- | ---
Line card | Information about the switchover operations performed on the specific line module
system up time | Amount of time elapsed since the last cold boot
last cold start | Date and time the router experienced the last cold start
last cold switchover | Date and time the router experienced the last cold switchover
last warm switchover | Date and time the router experienced the last warm switchover
Number of cold switchovers | Total number of cold switchovers the router has experienced
Number of warm switchovers | Total number of warm switchovers the router has experienced
LC activation time | Amount of time the line module has been active
type | Type of switchover. Possible options: cold-switch—When the router is in pending state and switchover occurs, the line module undergoes a cold-switch or cold re-start warm-switch—When the router is in active state and switchover occurs, the line module undergoes a warm-switch or warm restart
slot | Slot in which the line module resides
uptime | Amount of time the line module has been operational

#### Related Documentation

- Activating High Availability
- Deactivating High Availability
- mode
- line-card switch
- show redundancy history
- show redundancy line-card