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ip flow-top-talkers support

So I stumbled upon the ip flow-top-talkers feature and attempted to configure it on a 3560-X running 12.2(58)SE2.  It allowed me to configure this:

ip flow-top-talkers

top 5

sort-by bytes

cache-timeout 60000

Then on the interface I am interested in:

interface GigabitEthernet0/21

ip flow ingress

Which results is (drum roll please....)

Switch#show ip flow top

% Cache is empty

No joy.  So I checked the config guide for unsupported commands, these are not listed.

Then I thought maybe it had to be on a layer 3 interface (g0/21 is layer 2) so I did "ip flow ingress" on an SVI, same results.

So then I checked feature navigatore for "Flexible Netflow - Top N Talkers Support".  12.2SE is not listed, but 15.0(2)SE is.

Questions:

- Is the existence of the commands in 12.2(58)SE just an oversight?  Functionality seems to almost be there, just not quite.

- Does neflow need to be enabled on a layer 3 interface or will it work on layer 2 (assuming platform support of course)

Thanks,

-Jeff

  • LAN Switching and Routing
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