With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cmPhyTxEncapFarEndPktErrOverflow
cm Phy Tx Encap Far End Pkt Err Overflow
1.3.6.1.4.1.9.10.69.1.2.1.1.12
This object represents the higher word value of the counter associated with ingress error indications from the far end of an Ethernet network, where an ESCON stream is encapsulated in Ethernet packets. This counter is incremented whenever an ESCON packet or control character has 8b/10b code violations or running disparity errors in the ingress direction at the far end of the Ethernet network. This object has a valid value only for ESCON interfaces where Ethernet encapsulation is performed. NOTE: The object cmPhyTxEncapFarEndPktErrors contains the lower 32 bits of this counter value. SNMP v2c or v3 managers can use the cmPhyHCTxEsconPktInd object directly which is a 64 bit counter.
Back to CISCO-METRO-PHY-MIB MIB page.
IPHost Network monitor allows you to monitor cmPhyTxEncapFarEndPktErrOverflow on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.