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So you followed these steps?<br />
<br />
<a href="http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.1/13ew/configuration/guide/nfswitch.html" rel="ugc">http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.1/13ew/configuration/guide/nfswitch.html</a>
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So you followed these steps?

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.1/13ew/configuration/guide/nfswitch.html [http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.1/13ew/configuration/guide/nfswitch.html]

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We have a Verizon emulated LAN (fiber) terminating in our core switch. I need to monitor this port for usage. I see that the IOS on our switch supports netflow, but some of the commands are not there. <br />
<br />
How do I monitor a port? What commands?
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We have a Verizon emulated LAN (fiber) terminating in our core switch. I need to monitor this port for usage. I see that the IOS on our switch supports netflow, but some of the commands are not there. 

How do I monitor a port? What commands?

Enabling netflow on a 4507 core switch

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.