NetFlow support in CISCO 2950

NetFlow support in CISCO 2950

Hi,
I tried to enable NetFlow on CISCO 2950 switch but it is getting restarted again and again. If i disable the netflow export feature then its ok. The client for which i am installing it has netflow analyzer 5 and wants to monitor those series also.
Is there any solution of that like upgrading IOS or something?

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