Each conceptual row represents an interface
associated with a particular RADIUS Proxy server.
Entries in this table can be created or deleted via SNMP operations.
An row in this table can only be created if the value of the object
vRtrIfType in the conceptual row in the TIMETRA-VRTR-MIB::vRtrIfTable
corresponding with the same vRtrID and vRtrIfIndex, is equal to either
'network' or 'serviceIes in the Base router, or 'serviceVprn' in
a VPRN router instance.