With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnfPSPacketSizeDistribution
cnf PS Packet Size Distribution
1.3.6.1.4.1.9.9.387.1.5.1
A string contain IP Packet Size Distribution statistics. Distribution grouping are following :1-32 64 96 128 160 192 224 256 288 320 352 384 416 448 480 512 544 576 1024 1536 2048 2560 3072 3584 4096 4608. Value for each group will be expressed in 2 bytes (in Network byte order) and need to divide by 1000 to get the exact value given by CLI using show ip cache flow command.
Back to CISCO-NETFLOW-MIB MIB page.
IPHost Network monitor allows you to monitor cnfPSPacketSizeDistribution 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.