no outbound traffic on interface

no outbound traffic on interface

I have setup a Netflow anlayzer to monitor my router. My router consists of two interfaces E0 & E1. The Netflow analyzer machine is placed at the E1 segment. I have enabled netflow on both interface. I find that there are no outbound traffic on E1 interface in Netflow analyzer traffic report. Is it correct? How to fix it?

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