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

#### Purpose

Display the supported redundancy modes as well as other status relating to high availability for a line module installed in a particular slot.

#### Action

To display the redundancy information of a line module in a particular slot.

    host1#show redundancy line-card slot 3
    Line Card
    ---------

    automatic reverting is off

                                                               backed
           High           last                                 up       sparing
           Availability   activation   hardware   lockout      by        for         revert
    slot   State          type         role        config      slot       slot         at
    ----   --------        ---------   -------    ------      ------   -------      ------
     3      disabled        cold        ---        ---         ---      ---           ---

    Criteria Preventing High Availability from being Active
    -------------------------------------------------------
    slot                      criterion                              met
    ---       ----------------------------------------------------   ---
    3      Running configuration is safe for High Availability?      No

    Clients with Unsafe Configurations for High Availability
    --------------------------------------------------------
      client         mode       configuration
    -----------   -----------   -------------
    Global Ipv6   unsupported      unsafe

#### Meaning

Table 16 lists the show redundancy line-card slot slotNum command output fields.

Table 16: show redundancy line-card slot slotNum Output Fields

Field Name | Field Description
--- | ---
Line Card | Redundancy and configuration details for the line module in the specified slot
High Availability State | State of the high availability mode of the line module in the specified slot (disabled or active)
last activation type | Last type of activation that occurred on this router (that is, the method by which the line module last booted [cold-start or warm-start])
automatic reverting | Whether the router is enabled to revert from all spare line modules to the associated primary line modules automatically: on or off
slot | Slot number in which the line module resides
hardware role | Function of the line module: primary or spare.
lockout config | Status of redundancy on the line module: - - - —Line module redundancy is not supported protected—Line module redundancy is enabled locked out—Line module redundancy is disabled
sparing for slot | Slot that contains the line module that is a spare for this primary line module
backed up by slot | Slot that contains the primary line module for which this module is a spare
revert at | Time at which you want the line module to revert
Criteria Preventing High Availability from being Active | Criteria preventing the router from being in the active state of high availability mode. For the router to be in the Active state, all criteria for this option must be "yes"
criterion | Name of the criterion that must be met for the system to enter the active state of the stateful line module switchover process. During the active state, the mirroring subsystem synchronizes the secondary line module with the primary line module by mirroring updates to mirrored volatile storage
slot | Slot number in which the line module resides
met | Whether the criterion for high availability of the line-module pair is satisfied. Possible values: Yes—The specific criterion has been met for the system to enter the active state No—The specific criterion has not been met and the system transitions to the pending state
Clients with Unsafe Configurations for High Availability | Whether the client supports high availability and also the safety level of configuration
client | Name of the application that is running on the line module configured for high availability
mode | High availability status of the application running on the line module: supported or unsupported
configuration | Safety level of the configuration based on whether or not the client is supported or unsupported and in case of those unsupported, whether or not the client has been configured. For example, if an unsupported client has been configured on a router with high availability enabled, the configuration reads "unsafe"

#### Related Documentation

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