[j-nsp] Sampling filter with ifIndex

[Richard A Steenbergen]

On Mon, May 31, 2010 at 11:20:10AM +0545, Ramesh Karki wrote:
> Hi,
> 
>  Thank you for your kind Response.
> 
> The issue is on Sampling traffic filter by interface ?ifIndex? on JunOS 9.2
> running on M10i. I have flow collector called ?RansNet MNA? running on my
> VM, it has many options to filter the traffic and get output, but I am
> having problem on ifIndex filter with few interfaces IDs. we are unable to
> get the data with the option Interface ID filter, RansNet show errors ?such
> record not found?. But SNMP---MRTG is okay on these interface.
> 
> Even enabling local-dump on the router, flow on these interfaces
> (input/output)collect on ID 0 instead of correct iFindex ID.

There was a really long-standing bug (my case was open for well over a
year) where netflow ifindex fields would be incorrectly set to 0, and
IIRC at least some versions of 9.2 were affected. Supposedly this was an
I-chip specific issue though, and I don't think I-Chip based CFEBs were
supported until 9.4, so it might not be related to your issue. Still,
I'd be highly suspicious and try some newer code. We had some absolutely
horrific experiences with bugs (both netflow, and otherwise) all
throughout 9.2, and I THINK this one might not have been fixed until
9.3R3, but I try to repress those days so my memory may be a little
foggy.

-- 
Richard A Steenbergen <ras at e-gerbil.net>       http://www.e-gerbil.net/ras
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)