With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cegBufferRejMemUnavailable
Evolved Packet Core Gateway Buffer Rej Memory Unavailable
1.3.6.1.4.1.9.9.731.1.1.2.8
This object represents the total number of times, buffer allocation is rejected by gateway due to, requested memory is greater than cegTotalBufferAvailable.
Back to CISCO-EPC-GATEWAY-MIB MIB page.
IPHost Network monitor allows you to monitor cegBufferRejMemUnavailable 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.