Description: When retrieved, this attribute represents the current redundancy configuration of the specified Plug-In Unit. A value of 'none' indicates that the specified Plug-In Unit has no redundant module. A status of either 'working' or 'protect' indicates that the specified Plug-In Unit is either the working or protect Plug-In Unit in a redundancy relationship.

When used with the 'salixAtmfM4PlugInUnitRedundancyPartnerModule' attribute of the 'salixAtfM4PlugInUnitTable', it can be determined which Plug-In Units are in redudancy relationship and also the plug-in units role in that relationship (if they are in a relationship at all).

In addition to using these attributes to get information on redundant modules, these attributes can also be used to create redundancy relationships. By setting the 'salixAtmfM4PlugInUnitRedundancyPartnerModule' to a valid PhysicalIndex and also setting the 'salixAtmfM4PlugInUnitRedundancyConfig' on either of the plug-in units to 'working' or 'protect' (as the desired configuration for that plug-in unit), a redundancy pair is created. Redundancy relationships can be destroyed by setting the 'salixAtmfM4PlugInUnitRedundancyConfig' of either of the modules to 'none'.

If a new value of either 'working' or 'protect' is written to the 'salixAtmfM4PlugInUnitRedundancyConfig' attribute, a switchover occurs in the system (i.e. the 'working' becomes the 'protect' while the 'protect' becomes the 'working).

NOTE: It is only necessary to set the information on one of the plug-in unit entries. The information will be automatically set in the other entry by the system.