This is a Counter64 preserving the total packets sent by a now-expired control tunnel over its entire lifetime, per its description, the historical companion to the live cisgIpsSgTunOutPkts. As with the inbound version, the ratio between this and HistOutOctets for a closed tunnel can reveal whether outbound signaling was dominated by large or small packets over the connection's life. A history entry with an unusually high packet count relative to its octet total suggests that tunnel involved many small outbound control messages, such as frequent keepalives, before it ended.