With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
pppEAPInOctets
ppp EAP In Octets
1.3.6.1.4.1.2.6.119.4.2.12.1.3
Total number of EAP octets received over the PPP interface.
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IPHost Network monitor allows you to monitor pppEAPInOctets on IBM device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring IBM switches right now.