With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bgpPathAttrASPath
bgp Path Attribute Autonomous System Path
1.3.6.1.2.1.15.5.1.4
The set of ASs that must be traversed to reach the network. This object is probably best represented as SEQUENCE OF INTEGER. For SMI compatibility, though, it is represented as OCTET STRING. Each AS is represented as a pair of octets according to the following algorithm: first-byte-of-pair = ASNumber / 256; second-byte-of-pair = ASNumber & 255;
Back to BGP4-MIB MIB page.
IPHost Network monitor allows you to monitor bgpPathAttrASPath 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.