With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rsvpResvTSpecMaxTU
rsvp Resv T Spec Max TU
1.3.6.1.2.1.51.1.4.1.18
The maximum message size for this flow. The admission algorithm will reject TSpecs whose Maximum Transmission Unit, plus the interface headers, exceed the interface MTU.
Back to RSVP-MIB MIB page.
IPHost Network monitor allows you to monitor rsvpResvTSpecMaxTU on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.