With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rttMonRtpStatsOperAvgOWSD
Cisco RTT Monitor Rtp Stats Operational Avg OWSD
1.3.6.1.4.1.9.9.42.1.3.6.1.40
Average one way latency value from source to destination
Back to CISCO-RTTMON-RTP-MIB MIB page.
IPHost Network monitor allows you to monitor rttMonRtpStatsOperAvgOWSD on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.