With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgspLinkUtilizationRcvd
Cisco GSP Link Utilization Received
1.3.6.1.4.1.9.9.336.1.6.1.1.80
An estimate of the utilization of this link for traffic received on this link in the prior time period defined by the cgspUtilSampleInterval object.
Back to CISCO-ITP-GSP-MIB MIB page.
IPHost Network monitor allows you to monitor cgspLinkUtilizationRcvd 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.