A table that contains the session statistics objects for
the Authenticator PWA associated with each ifIndex. An entry
appears in this table for each ifIndex that may authenticate
access to itself. Session entries are collected for each
ifIndex up to the maximum allowed. When the maximum number of
allowed sessions has been reached, the oldest session
entries will be replaced with newer ones as necessary. All
objects/instances in this table are stored in non-persistent
memory.