Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Traffic monitoring on Tunnel

Posted on 2016-08-16
7
103 Views
Last Modified: 2016-09-07
Hi ;
We have an internet connection connecting the site to Data center. We are doing SNMP polling on the Tunnel interface of cisco router and are getting the capacity close to zero, but when the physical interface (Fa0/0) is monitored the traffic reading goes up substantially. Can anyone please explain why it is happening?
0
Comment
Question by:totaram
  • 4
  • 2
7 Comments
 
LVL 32

Expert Comment

by:harbor235
ID: 41759302
Perhaps you are seeing the network management system poll/monitor the device/interface.
You can easily check this with netflow data directly on the router.

enable netflow or add acls to capture the traffic

show ip cache flow - will display traffic flowing through the router


harbor235 ;}
0
 

Author Comment

by:totaram
ID: 41760411
Yes.. that is the issue.. why are we not able to see much data through the virtual tunnel int that we configured for the
IPSEC?

One small question: How do we enable netflow on the router? I have not done that before. Do we have to have netflow tool?

Thanks
0
 
LVL 22

Expert Comment

by:eeRoot
ID: 41760418
Do you see statistics on the tunnel interface if you use the "show interface ..." command?
0
Easy, flexible multimedia distribution & control

Coming soon!  Ideal for large-scale A/V applications, ATEN's VM3200 Modular Matrix Switch is an all-in-one solution that simplifies video wall integration. Easily customize display layouts to see what you want, how you want it in 4k.

 

Author Comment

by:totaram
ID: 41760562
Yes.. I see the stats on both sh int commands.. (Tunnel as well as Fa0/0)
0
 
LVL 32

Accepted Solution

by:
harbor235 earned 500 total points
ID: 41779772
You need a netflow collector to export the data, but you can view the currently cached netflow data that is kept on the router via show ip cache flow

To configure netflow do the following;

on the interface in which you want to capture netflow

ip flow ingress
ip flow egress

Validate with show ip cache flow - to view netflow stats

If you want to export that data top a collector add the following cmds

ip flow-export version 5 /9  - 5 is most common, 9 has additional capabilities and is newer
ip flow-export destination <collector_ip> <collector netflow port>
ip flow-export source loopback?   - source of traffic when exporting,

There are a couple additional options but this will get you going

Is that it?

harbor235 ;}
0
 

Author Comment

by:totaram
ID: 41788782
Thanks
0
 

Author Comment

by:totaram
ID: 41788783
Thanks
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

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

Suggested Solutions

Exchange server is not supported in any cloud-hosted platform (other than Azure with Azure Premium Storage).
For months I had no idea how to 'discover' the IP address of the other end of a link (without asking someone who knows), and it drove me batty. Think about it. You can't use Cisco Discovery Protocol (CDP) because it's not implemented on the ASAs.…
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…
As a trusted technology advisor to your customers you are likely getting the daily question of, ‘should I put this in the cloud?’ As customer demands for cloud services increases, companies will see a shift from traditional buying patterns to new…

839 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