With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
snaNodeLinkOperMaxPiu
sna Node Link Operational Max Piu
1.3.6.1.2.1.34.1.1.8.1.2
Maximum number of octets that can be exchanged by this Node in one Path Information Unit (PIU).
Back to SNA-NAU-MIB MIB page.
IPHost Network monitor allows you to monitor snaNodeLinkOperMaxPiu on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.