With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
casfVcCountSentOctets
Cisco ATM Switching Fabric Vc Count Sent Octets
1.3.6.1.4.1.9.9.112.1.4.1.1.9
Number of octets sent. This counter counts octets from the beginning of the frame relay header field to the end of user data.
Back to CISCO-ATM-SWITCH-FR-IWF-MIB MIB page.
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