I've been interested in implementing MARS on my system. I've been reading up on it and am wondering if NetFlow is something that comes with an IOS, or with MARS, or if it's something that I have to buy separately.
MARS is a netflow collector, meaning it receives netflows. Your network devices have to support and be configured to send netflows. Netflow is supported in the basic IOS. Attached is a high-level summary of what I've found in various docs.
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