With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cPrefPathRMapSetIntfPref
Cisco Pref Path R Map Set Intf Pref
1.3.6.1.4.1.9.9.592.1.1.4.1.1
Preference level, which indicates the metric or cost, associated with the cPrefPathRMapSetIntf outgoing interface. The lower the number the higher the preference.
Back to CISCO-PREFERRED-PATH-MIB MIB page.
IPHost Network monitor allows you to monitor cPrefPathRMapSetIntfPref on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.