With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dspuPuOperMaxIframe
Cisco DSPU Pu Operation Max Iframe
1.3.6.1.4.1.9.9.24.1.4.2.1.10
Maximum size of an I-frame that can be transmitted/received across the link between this dspuNode and the remote PU.
Back to CISCO-DSPU-MIB MIB page.
IPHost Network monitor allows you to monitor dspuPuOperMaxIframe on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.