How can I see what is using all my bandwidth on cisco IOS?

StackOverflow https://stackoverflow.com/questions/2051139

  •  20-09-2019
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Question

I have a cisco router performing NAT for my local network. Download bandwidth is stagnant at 2MB/s and I'm not sure which host is responsible for this and what exactly it's connecting to. How can I find this? Thank you.

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Solution

On your external interface use:

interface {interface} {interface_number}
ip route-cache flow
bandwidth <kbps>
exit

Then use the command below to get some data about usage:

show ip cache flow
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