With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cagwServiceNotReadySignalingPktsDrops
Cisco's ASN Gateway Service Not Ready Signaling Packets Drops
1.3.6.1.4.1.9.9.638.1.3.1.1.1.17
The number of signaling packets dropped while in non-Active state for redundant configuration.
Back to CISCO-ASN-GATEWAY-MIB MIB page.
IPHost Network monitor allows you to monitor cagwServiceNotReadySignalingPktsDrops 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.