With IPHost Network Monitor you can run simple snmp requests against a Huawei device in your network.
etherStatsPkts256to511Octets
ether Stats Pkts256to511 Octets
1.3.6.1.2.1.16.1.1.1.17
The total number of packets (including bad packets) received that were between 256 and 511 octets in length inclusive (excluding framing bits but including FCS octets).
Back to IEEE8021-PAE-MIB MIB page.
IPHost Network monitor allows you to monitor etherStatsPkts256to511Octets on Allied Telesis device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Allied Telesis access points right now.