With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mplsInterfaceAvailableBandwidth
mpls Interface Available Bandwidth
1.3.6.1.3.96.1.1.1.7
This value indicates the total amount of available bandwidth available on this interface and is specified in kilobits per second (Kbps). This value is calculated as the difference between the amount of bandwidth currently in use and that specified in mplsInterfaceTotalBandwidth. This variable is not applicable when applied to the interface with index 0. When this value cannot be measured, this value should contain the nominal bandwidth.
Back to MPLS-LSR-STD-MIB MIB page.
IPHost Network monitor allows you to monitor mplsInterfaceAvailableBandwidth 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.