This is the control tunnel Table and is
implemented as a sliding window in which only the
last 'N' entries are maintained. The maximum number
of entries is specified by the object
'cisgIpsSgFailTableSize'.
The failure records are catalogued under each
signaling protocol type; that is, the first index
of this table is the signaling protocol identifier
('cisgIpsSgProtocol'). The second index
('cisgIpsSgFailIndex') identifies the failure record
uniquely in the subcategory.
Should a failure be identified before the signaling
protocol itself has been identified by the managed
entity, the failure record will be classified under
'cpUnknown'.