This class represents state data.
This table extends the nhrpCacheTable for
NHSes. If the nhrpCacheTable has a row added due to
an NHS or based on information regarding an NHS then
a row is also added in this table.
The rows in this table will be created when rows in
the nhrpCacheTable are created. However, there may
be rows created in the nhrpCacheTable which do not
have corresponding rows in this table. For example,
if the nhrpCacheTable has a row added due to a Next
Hop Client which is co-resident on the same device
as the NHS, a row will not be added to this table.