With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cagwDownlinkPktDropUsrgrpAclDeny
Cisco's ASN Gateway Downlink Packet Dropped Usrgrp Acl Deny
1.3.6.1.4.1.9.9.638.1.3.1.1.1.128
The number of downlink packets dropped due to user-group ACL deny.
Back to CISCO-ASN-GATEWAY-MIB MIB page.
IPHost Network monitor allows you to monitor cagwDownlinkPktDropUsrgrpAclDeny on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.