Each entry contains the attributes associated with
a previously active Phase-1 IKE Tunnel.
This table has a sparse table relationship with the
generic Phase-1 Tunnel history table
'cisgIpsSgTunnelHistTable' defined in
CISCO-IPSEC-SIGNALING-MIB. However, the value of the
index column in this table will always be either
'cpIkev1' or 'cpIkev2'.