With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
frxCktBe
Cisco 90i Circuit Be
1.3.6.1.4.1.1570.1.6.2.1.4
This is the Excess Burst Size (Be) in bits for the addressed permanent virtual circuit. The time interval over which the excess burst is measured is Be/CIR. (Typical value 1536000).
Back to CISCO-90-MIB MIB page.
IPHost Network monitor allows you to monitor frxCktBe 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.