I have been looking into this solution as an interim to solving the problem. 
Anyone have any insight as to what could be causing this problem or what to 
look for. Won't be able to call in for support for a week or 2.



----- Original Message ----
From: Huber Adrian TRAIL <[email protected]>
To: Enterasys Customer Mailing List <[email protected]>
Sent: Thursday, March 5, 2009 3:11:39 PM
Subject: RE: [enterasys] Matrix N Series Netflow Numbers not matching snmp 
totals problem


I noticed this once with an SSR-8 before. I decided to use fprobe (software) 
with a linux based server and attached it to the router on a mirrored port. The 
fprobe had to have minimal configuration so it knows what traffic is 
internal/external. It then emitted the Netflow packets just as any router would 
to our collector (flow-tools). This doesn't answer your question, but it is a 
workaround that I used, and still use today. 


-----Original Message-----
From: marc slice [mailto:[email protected]] 
Sent: Thursday, March 05, 2009 10:38 AM
To: Enterasys Customer Mailing List
Subject: [enterasys] Matrix N Series Netflow Numbers not matching snmp totals 
problem


On a Matrix N series we currently have netflow turned on for the ports to our 
ISP ports (ge.1.29 and ge.1.30) and our public vlan ports 
(ge.1.2,ge.1.11,ge.1.17). Our current reading of the bytes per second through 
snmp on our switch is equal to our isp's numbers yet each and every netflow 
collector we have tried is reporting less. Mainly our inbound numbers are off 
by 40-50% yet the outbound is only 5-10% off on ge.1.29-30.

Also we have tried using both Netflow v5 and v9 and used collectors on 
different servers directly plugged into the matrix switch. We have tried 
flow-tools, ntop, scrutinizer, solarwinds orion NPM with NTA and one or 2 
others but all report the same difference. Running the latest firmware.

Anyone have any insight or have the same problem? We need to account for the 
traffic by IP and were relying heavily on this working.



      

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