TopTalkers in Nexus7K Layer 2 Interface

[snarayanaraju]

Hello - I have nexus 7K switch connected to 3750 switch as a trunk Link. Many times the utilization of the Link between these 2 switches (Nexus 7K and 3750 switch) going High bandwidth Utilization. 

I want to know the Top Talkers with Source and Destination IP address who is consuming the Bandwidth. I tried to configure FNF but i am not able to apply that on the L2 Trunk Interface.

What is the best solution to achieve my goal? Thanks in advance

regards

Sairam

[ADP_89]

Hello,

Mainly there are 2 ways to accomplish this. The first one is to use sampled netflow and send the netflow data to a collector, and the second(and easier) is to create a span session so you can mirror all the traffic from this link to another port were you can attach a traffic analyzer, like a server/PC with Wireshark.

For netflow you need to check if your linecard supports it and in case follow this guide:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus7000/sw/system-management/guide/b_Cisco_Nexus_7000_Series_NX-OS_System_Management_Configuration_Guide/b_Cisco_Nexus_7000_Series_NX-OS_System_Management_Configuration_Guide_chapter_011000....

This instead is the configuration guide for the SPAN session:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus7000/sw/system-management/guide/b_Cisco_Nexus_7000_Series_NX-OS_System_Management_Configuration_Guide/b_Cisco_Nexus_7000_Series_NX-OS_System_Management_Configuration_Guide_chapter_010100....

HTH,

ADP

[snarayanaraju]

Thanks for responding. For discussion lets think about SPAN. If i do so, i can collect dump of traffic to the subjected port and open the data in wireshark. But will that show the Top Talkers and Maximum Bandwidth consumed users using Wireshark?

[ADP_89]

Hello,

Sure it can, there is a ton of features that can help you pull all the statistics that you are looking for. You can put all the data into graphs as well.

Cheers,

ADP