Netflow config on a 6500

Answered Question
Oct 15th, 2007

Hey guys,


I read through the documentation and saw that to configure netflow for the PFC, you use the mls nde commands. Thats all straighforward.


What I dont get is for the netflow on the RP, they tell you to use "ip route-cache flow" command.


What I couldn't find anywhere was, does this impact CEF switching at all? Does this conflict with "ip route-cache cef"? Before I issue this command, I want to make sure that this command does not impact the performance and also does not disable cef for the interface its applied to.


Thanks for any and all clarifications.


Edit: On a shutdown interface, I see these changes when I apply "ip route-cache flow"


Before:

#show cef interface t1/1

TenGigabitEthernet1/1 is down (if_number 4)

...

IP CEF switching enabled

IP Feature Fast switching turbo vector

IP Feature CEF switching turbo vector

...


After:

#show cef interface t1/1

TenGigabitEthernet1/1 is down (if_number 4)

...

IP CEF switching enabled

IP Flow switching turbo vector

IP Flow CEF switching turbo vector

...

Correct Answer by Jan Nejman about 9 years 4 months ago

Hello,

don't worry, if you select "ip route-cache flow" your CEF configuration remain unchanged. You can use "ip flow ingress" instead of route-cache command.


"ip flow ingress" is supported in release 12.2(18)SXD and later releases.

"ip route-cache flow" is deprecated in release 12.2(18)SXD.


Best regards


Jan Nejman

Caligare, Co.

http://www.caligare.com/


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Correct Answer
Jan Nejman Mon, 10/15/2007 - 23:52

Hello,

don't worry, if you select "ip route-cache flow" your CEF configuration remain unchanged. You can use "ip flow ingress" instead of route-cache command.


"ip flow ingress" is supported in release 12.2(18)SXD and later releases.

"ip route-cache flow" is deprecated in release 12.2(18)SXD.


Best regards


Jan Nejman

Caligare, Co.

http://www.caligare.com/


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