With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
diffServMultiFieldClfrSrcPrefixLength
Services Differentiated Services Services Multi Field Clfr Source Prefix Length
1.3.6.1.2.1.97.1.2.6.1.6
The length of the CIDR Prefix carried in diffServMultiFieldClfrSrcAddr. In IPv4 addresses, a length of 0 indicates a match of any address; a length of 32 indicates a match of a single host address, and a length between 0 and 32 indicates the use of a CIDR Prefix. IPv6 is similar, except that prefix lengths range from 0..128.
Back to DIFFSERV-MIB MIB page.
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