With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
expValueInstance
exp Value Instance
1.3.6.1.4.1.9.10.22.1.4.1.1.1
The final instance portion of a value's OID according to the wildcarding in instances of expObjectID for the expression. The prefix of this OID fragment is 0.0, leading to the following behavior. If there is no wildcarding, the value is 0.0.0. In other words, there is one value which standing alone would have been a scalar with a 0 at the end of its OID. If there is wildcarding, the value is 0.0 followed by a value that the wildcard can take, thus defining one value instance for each real, possible value of the wildcard. So, for example, if the wildcard worked out to be an ifIndex, there is an expValueInstance for each applicable ifIndex.
Back to EXPRESSION-MIB MIB page.
IPHost Network monitor allows you to monitor expValueInstance 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.