With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ceipSecTunOutCompFailPkts
Cisco Enhanced IP Sec Tunnel Out Compression Fail Packets
1.3.6.1.4.1.9.9.432.1.1.2.1.51
The total number of outbound packets that failed compression because they grew in size after compression.
Back to CISCO-ENHANCED-IPSEC-FLOW-MIB MIB page.
IPHost Network monitor allows you to monitor ceipSecTunOutCompFailPkts on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.