With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
parIfHiAddrMax
par If Hi Addr Max
1.3.6.1.4.1.351.130.2.1.1.8
This object specifies the maximum VPI that PAR can use for configuring connection in the interface.
Back to CISCO-WAN-PAR-MIB MIB page.
IPHost Network monitor allows you to monitor parIfHiAddrMax 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.