With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
snaLuRtmLastRspTime
sna Lu Rtm Last Rsp Time
1.3.6.1.2.1.34.1.3.1.1.18
This value indicates the response time for the last transaction in units of 1/10th of a second.
Back to SNA-NAU-MIB MIB page.
IPHost Network monitor allows you to monitor snaLuRtmLastRspTime 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.