Solved

netflow from Cisco 2811 not arriving at destination?

Posted on 2011-03-02
3
1,010 Views
Last Modified: 2012-06-27
As you can see below - exported flows count is incrementing.  But in my Solar Winds netflow collector "Last Received Netflow" is saying "Never".  The incrementing counter should mean that the router is properly trying to send the netflow info - right?

c2811-1#sho ip flow export
Flow export v5 is enabled for main cache
  Export source and destination details :
  VRF ID : Default
    Source(1)       10.10.5.1 (GigabitEthernet1/0.1)
    Destination(1)  10.10.1.15 (2055)
  Version 5 flow records
  123940560 flows exported in 5169293 udp datagrams
  0 flows failed due to lack of export packet
  0 export packets were sent up to process level
  0 export packets were dropped due to no fib
  0 export packets were dropped due to adjacency issues
  0 export packets were dropped due to fragmentation failures
  0 export packets were dropped due to encapsulation fixup failures

c2811-1#sho ip flow export
Flow export v5 is enabled for main cache
  Export source and destination details :
  VRF ID : Default
    Source(1)       10.10.5.1 (GigabitEthernet1/0.1)
    Destination(1)  10.10.1.15 (2055)
  Version 5 flow records
  123941197 flows exported in 5169314 udp datagrams
  0 flows failed due to lack of export packet
  0 export packets were sent up to process level
  0 export packets were dropped due to no fib
  0 export packets were dropped due to adjacency issues
  0 export packets were dropped due to fragmentation failures
  0 export packets were dropped due to encapsulation fixup failures
0
Comment
Question by:amigan_99
  • 2
3 Comments
 
LVL 24

Accepted Solution

by:
rfc1180 earned 500 total points
ID: 35023491
> 10.10.1.15
This is the destination, but it is not on the same broadcast domain.

Are you able to confirm ip connectivity end to end (ICMP, traceroute, etc).
Is the network in the routing table?
How is the routing tables end to end?
Are there any filters in the path that might be dropping UDP packets?
Have you ran wireshark of some sort on the Solarwinds host to see if the packets are even arriving?

Billy
0
 
LVL 1

Author Comment

by:amigan_99
ID: 35028276
If I ping from the source interface for netflow I can ping the collector - yes.  That's a good thought to look at wireshark on solar winds.  I think it's on there actually.
0
 
LVL 1

Author Closing Comment

by:amigan_99
ID: 35030056
Well the cflow data is definitely not getting there - confirmed via wireshark.  Thanks for the reminder.
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In the world of WAN, QoS is a pretty important topic for most, if not all, networks. Some WAN technologies have QoS mechanisms built in, but others, such as some L2 WAN's, don't have QoS control in the provider cloud.
Getting hacked is no longer a matter or "if you get hacked" — the 2016 cyber threat landscape is now titled "when you get hacked." When it happens — will you be proactive, or reactive?
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question