With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgspLinkXmitQueueDepth
Cisco GSP Link Xmit Queue Depth
1.3.6.1.4.1.9.9.336.1.6.1.1.8
Number of packets waiting to be sent over this link.
Back to CISCO-ITP-GSP-MIB MIB page.
IPHost Network monitor allows you to monitor cgspLinkXmitQueueDepth 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.