With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cipIpOutDiscards
Cisco Channel Interface Processor Ip Out Discards
1.3.6.1.4.1.9.9.32.1.1.1.1.12
The number of output IP datagrams for which no problem was encountered to prevent their transmission to their destination, but which were discarded (e.g., for lack of buffer space). Note that this counter would include datagrams counted in ipForwDatagrams if any such packets met this (discretionary) discard criterion.
Back to CISCO-CIPTCPIP-MIB MIB page.
IPHost Network monitor allows you to monitor cipIpOutDiscards 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.
