With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rsvpResvPort
rsvp Resv Port
1.3.6.1.2.1.51.1.4.1.9
The UDP or TCP port number used as a source port for this sender in this session. If the IP protocol in use, specified by rsvpResvProtocol is 50 (ESP) or 51 (AH), this represents a generalized port identifier (GPI). A value of zero indicates that the IP protocol in use does not have ports. This object may not be changed when the value of the RowStatus object is 'active'.
Back to RSVP-MIB MIB page.
IPHost Network monitor allows you to monitor rsvpResvPort 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.