Solved

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

Posted on 2014-12-22
3
243 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
[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
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

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Home firewall recommendations 11 86
Network setup between buildings 4 54
Personal Secured Home Networking 2 44
Force a website to use the second network card 3 36
Meet the world's only “Transparent Cloud™” from Superb Internet Corporation. Now, you can experience firsthand a cloud platform that consistently outperforms Amazon Web Services (AWS), IBM’s Softlayer, and Microsoft’s Azure when it comes to CPU and …
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…
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
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…

735 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