With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cbgpPeerPrefixThreshold
CISCO BGP4 Peer Prefix Threshold
1.3.6.1.4.1.9.9.187.1.2.4.1.4
Prefix threshold value (%) for an address family on this connection at which warning message stating the prefix count is crossed the threshold or corresponding SNMP notification is generated.
Back to CISCO-BGP4-MIB MIB page.
IPHost Network monitor allows you to monitor cbgpPeerPrefixThreshold 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.