With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bgp4PathAttrLocalPref
bgp4 Path Attribute Local Preference
1.3.6.1.2.1.15.6.1.8
The originating BGP4 speaker's degree of preference for an advertised route. A value of -1 indicates the absence of this attribute.
Back to BGP4-MIB MIB page.
IPHost Network monitor allows you to monitor bgp4PathAttrLocalPref on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.