With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dsx1IntervalValidData
dsx1 Interval Valid Data
1.3.6.1.2.1.10.18.8.1.13
This variable indicates if the data for this interval is valid.
Back to DS1-MIB MIB page.
IPHost Network monitor allows you to monitor dsx1IntervalValidData on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.