With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dot1agCfmLtrNextEgressIdentifier
dot1ag Cfm Ltr Next Egress Identifier
An octet field holding the Next Egress Identifier returned in the LTR Egress Identifier TLV of the LTR. The Next Egress Identifier Identifies the Linktrace Responder that transmitted this LTR, and can forward the LTM to the next hop. This is the same value as the Egress Identifier TLV of the forwarded LTM, if any. If the FwdYes bit of the Flags field is false, the contents of this field are undefined, i.e., any value can be transmitted, and the field is ignored by the receiver. REFERENCE 802.1ag clauses 12.14.7.5.3:f and 20.36.2.4
Back to IEEE8021-CFM-MIB MIB page.
IPHost Network monitor allows you to monitor dot1agCfmLtrNextEgressIdentifier on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.