With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
pppLinkErrInvProtos
ppp Link Error Inv Protos
1.3.6.1.4.1.2.6.119.4.2.2.1.8
Total number of packets received with a Protocol identifier that is not valid.
Back to ibm-ibmiroc MIB page.
IPHost Network monitor allows you to monitor pppLinkErrInvProtos 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.