09-07-2004 06:11 AM - edited 03-02-2019 06:17 PM
Hello All,
I am trying to setup netflow collection on a CISCO 3750 running 12.1.9EA1d without much success. Netflow configuration is straight forward i.e.
int fastethernet 1/0/x
ip route-cache flow
is all thats required ( for a simple config )
However when I use "show ip cache flow" I do not see any flows. I have sucessfully implemented netflow on a CISCO 2621 without issues.
I do see some flows appear every couple of hours but not to the level I am expecting.
Having researched this on the web, I believe the problem to be with distributed CEF but there is no way to turn this off globally or on an interface level.
Has anybody sucessfully configured netflow on a CAT 3750? if so, how!!
Many Thanks.
Ismail.
09-07-2004 07:22 AM
You can turn off cef by issuing the command no ip cef in global configuration mode. Of course I don't believe you are running distrubted CEF because that requires a VIP which is only on the 7000 series routers.
09-08-2004 12:05 AM
Thank you for the update.
Like yourself i was under the impression that you needed special hardware for dCef. However, the CAT 3750 only supports this mode. See Below:
MHSE12438#sh ip cef detail
IP Distributed CEF with switching (Table Version 10820), flags=0x0
167 routes, 0 reresolve, 0 unresolved (0 old, 0 new), peak 0
167 leaves, 23 nodes, 54080 bytes, 4200 inserts, 4033 invalidations
45 load sharing elements, 15120 bytes, 45 references
universal per-destination load sharing algorithm, id B1A0A3BF
3(0) CEF resets, 4608 revisions of existing leaves
Resolution Timer: Exponential (currently 1s, peak 1s)
6625 in-place/0 aborted modifications
refcounts: 6499 leaf, 6144 node
Unfortunately CEF cannot be disable on the box as it returns error message:
MHSE12438(config)#no ip cef distributed
%Cannot disable CEF on this platform
I have tried "no ip route-cache cef" on the interface but this does not help either.
Ismail.
09-11-2004 10:05 AM
Hi,
ip route-cache is an unsupported command.
Regards
Peter
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