With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
portMacControlUnknownProtocolFrames
port Mac Control Unknown Protocol Frames
1.3.6.1.4.1.9.5.1.4.1.1.21
with an opcode that is not supported by the device.
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor portMacControlUnknownProtocolFrames on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.
