i am using netflow analyzer to monitor traffic 9.5 (9500) on a Cisco 3640 router with the below interface configuration:

Fa0/0 (managed)

Fa0/0.1 (managed)

Fa0/0.2 (managed)

Fa0/0.3 (managed)

Fa0/0.4 (unmanaged)

Fa0/0.5 (managed)

Fa1/0

Fa2/0 (managed)

all physical interfaces have the command "ip route-cache flow" applied to them,

global configuration commands applied are:

snmp-server ifindex persist

my problem is that interface Fa1/0 is not showing at all in the interface view, all other interfaces show up fine and i can see traffic on them.

please someone help with this problem.