With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ctbrMSDUMaxLength
ctbr MSDU Max Length
1.3.6.1.4.1.9.9.269.1.1.1.1.11
Maximum length of the data portion of a packet for this particular interface. This is the maximum MAC Service Data Unit length, which is greater than or equal to ifMtu, depending on the configured MAC-level encapsulation.
Back to CISCO-TBRIDGE-DEV-IF-MIB MIB page.
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