Solved

Traffic monitoring on Tunnel

Posted on 2016-08-16
7
105 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
[X]
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
  • 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
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.

 

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

Surfing Is Meant To Be Done Outdoors

Featuring its rugged IP67 compliant exterior and delivering broad, fast, and reliable Wi-Fi coverage, the AP322 is the ideal solution for the outdoors. Manage this AP with either a Firebox as a gateway controller, or with the Wi-Fi Cloud for an expanded set of management features

Question has a verified solution.

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

Suggested Solutions

Envision that you are chipping away at another e-business site with a team of pundit developers and designers. Everything seems, by all accounts, to be going easily.
When speed and performance are vital to revenue, companies must have complete confidence in their cloud environment.
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…
Both in life and business – not all partnerships are created equal. Spend 30 short minutes with us to learn:   • Key questions to ask when considering a partnership to accelerate your business into the cloud • Pitfalls and mistakes other partners…

730 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