Solved

With several sites on MPLS and Cisco Routers wondering how to view top protocol/talker

Posted on 2014-12-22
3
239 Views
Last Modified: 2014-12-29
Hello EE,

We manage our own routers: Cisco 2921
Some sites have excessive usage and are requesting bandwidth but for the number of users I'd prefer to check what is using up the bandwidth at these couple sites before hand.  Our vendor doesn't do any network monitoring (ISP) and we don't currently have Netflow setup or a server to monitor.  I'm wondering if there are commands I could go in and see what:1. top protocol used  2. top send/receive IP.

Thanks
0
Comment
Question by:operationsIT
3 Comments
 
LVL 7

Expert Comment

by:Ned Ramsay
ID: 40513793
The Cisco NBAR system is your best bet:
If your release of IOS supports NBAR, simply add the 'ip nbar protocol-discovery' configuration command to the interface that your users are using as their default gateway.

For example:

ROUTER1#config t
Enter configuration commands, one per line. End with CNTL/Z.
ROUTER1(config)#interface FastEthernet0/0
ROUTER1(config-if)#ip nbar protocol-discovery
ROUTER1(config-if)#^Z
ROUTER1#wr
Building configuration...
[OK]

Once NBAR is gathering data, you can use the 'show ip nbar resources' command to see how much memory it's taking up. As long as the numbers are acceptable, you can leave NBAR protocol discovery running as long as you like.

To see the really interesting information, issue 'show ip nbar protocol-discover' and look at all the protocols flowing to (and perhaps through) your router.

To limit outputs use the following: show ip nbar protocol-discovery top-n X (where X is the number of protocols you wish to monitor).

You can then apply this to other interfaces if need be to drill down.
0
 
LVL 4

Accepted Solution

by:
askincakir earned 500 total points
ID: 40514493
Hi,

Cisco routers support net flow configuration. Please check below link. Flow top talkers may help you also to see who is making traffic more than others.

Br,
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/netflow/configuration/12-4t/nf-12-4t-book/cfg-nflow-top-talk.html#GUID-824723EE-2551-4D64-9E0B-F5DF065C83B9

Example:

Router# show ip flow top-talkers
SrcIf         SrcIPaddress    DstIf         DstIPaddress    Pr SrcP DstP Bytes
Et3/0         10.1.1.3        Local         10.1.1.2        01 0000 0000  4800
Et3/0         10.1.1.4        Local         10.1.1.2        01 0000 0000  4800
Et3/0         10.1.1.5        Local         10.1.1.2        01 0000 0000   800
3 of 10 top talkers shown. 3 flows processed.
0
 

Author Closing Comment

by:operationsIT
ID: 40522351
Great!
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

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

I recently attended Cisco Live! in Las Vegas, a conference that boasted over 28,000 techies in attendance, and a week of hands-on learning hosted by a solid partner with which Concerto goes to market.  Every year, Cisco displays cutting-edge technol…
This article will inform Clients about common and important expectations from the freelancers (Experts) who are looking at your Gig.
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…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

809 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