With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bgpPeerFsmEstablishedTime
bgp Peer Fsm Established Time
1.3.6.1.2.1.15.3.1.16
This timer indicates how long (in seconds) this peer has been in the Established state or how long since this peer was last in the Established state. It is set to zero when a new peer is configured or the router is booted.
Back to BGP4-MIB MIB page.
IPHost Network monitor allows you to monitor bgpPeerFsmEstablishedTime 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.