With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cegTotalBufferAvailable
Evolved Packet Core Gateway Total Buffer Available
1.3.6.1.4.1.9.9.731.1.3.9.4
This object represents the total unallocated bytes at buffering agents.
Back to CISCO-EPC-GATEWAY-MIB MIB page.
IPHost Network monitor allows you to monitor cegTotalBufferAvailable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.