05-14-2009 06:13 AM - edited 03-04-2019 04:45 AM
Hello,
I have NetFlow configured on 2 different 4500s, with the below hardware:
THATCH_CR451_01#sh mod
Chassis Type : WS-C4510R
Power consumed by backplane : 40 Watts
Mod Ports Card Type Model
---+-----+--------------------------------------+----------
1 2 Supervisor V 1000BaseX (GBIC) WS-X4516
Mod Submodule Model
----+-----------------------+------------
1 Netflow Services Card WS-F4531
running IOS: cat4500-entservices-mz.122-25.SG4.bin
THATCH_CR451_01#sh ip flow export
Flow export v5 is enabled for main cache
Exporting flows to 161.12.20.11 (9991)
Exporting using source interface Loopback0
Version 5 flow records
47178983 flows exported in 1572650 udp datagrams
and....
HORLEY_CC450_01#sh mod
Chassis Type : WS-C4506
Power consumed by backplane : 0 Watts
Mod Ports Card Type Model
---+-----+--------------------------------------+--------------
1 2 Supervisor IV 1000BaseX (GBIC) WS-X4515
Mod Submodule Model
----+-----------------------+------------
1 Netflow Services Card WS-F4531
running IOS: cat4500-entservices-mz.122-25.SG.bin
HORLEY_CC450_01#sh ip flow export
Flow export v5 is enabled for main cache
Exporting flows to 161.12.20.11 (9991)
Exporting using source interface Loopback0
Version 5 flow records
2137814974 flows exported in 71260500 udp datagrams
both have the same config applied:
ip flow-export source Loopback0
ip flow-export version 5
ip flow-export destination 161.12.20.11 9991
There is no option to add the "ip route-cache" line under each layer-3 interface, however HORLEY_CC450_01 is collecting stats, but the THATCH_CC450_01 is not....
Feature navigator states netflow should work on the IOS installed, but is defintely not. I can see flows saying they are being exported, but not collecting within Netflow. Is this a known bug, or is there additional config needed? Any help appreciated.
Thanks
Phil
Solved! Go to Solution.
05-26-2009 04:58 AM
I found some documentation stating this as well, but I believe it is specific to routers.
I also found this document: http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/25ew/configuration/guide/nfswitch.html#wp1014923 which explicitly states "Enabling NetFlow on a per interface basis is not supported on a Catalyst 4500 switch."
05-22-2009 04:52 AM
Ahoy Phil,
Have you had any success with this? I am experiencing the same issue on cat4000-i5k91s-mz.122-25.EWA14.bin.
Would appreciate any insight, thanks!
-Adam
05-22-2009 05:17 AM
Hello,
No - nothing of note to resolve this problem... I guess its a 'feature' with the cisco code/HW combination....
Rgds
Phil
05-22-2009 06:16 PM
in some recent IOS releases Cisco Express Forwarding has to be enabled. make sure you've issued the ip cef command in global config mode
05-26-2009 02:03 AM
If only it was that easy... CEF configured on all 4500s already....
05-26-2009 04:58 AM
I found some documentation stating this as well, but I believe it is specific to routers.
I also found this document: http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/25ew/configuration/guide/nfswitch.html#wp1014923 which explicitly states "Enabling NetFlow on a per interface basis is not supported on a Catalyst 4500 switch."
05-27-2009 01:20 AM
Adam,
"ip flow ingress infer-fields" in global config command enabled netflow for me....
thanks for your help!... be warned though, when entering the command your session freezes for a short period, so be careful if adding on a live network in the middle of the day (just in case it does have an impact)!
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