With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cagwUserGrpEthGrePacketsReceived
Cisco's ASN Gateway User Group Ethernet Gre Packets Received
1.3.6.1.4.1.9.9.638.1.3.4.1.1.21
Total number of packets received by this user group on ethernet convergence sublayer.
Back to CISCO-ASN-GATEWAY-MIB MIB page.
IPHost Network monitor allows you to monitor cagwUserGrpEthGrePacketsReceived on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.