Solved

Does teaming a Nic mean they both work at the same time and can more than 2 be in one team?

Posted on 2008-10-03
3
341 Views
Last Modified: 2012-06-27
Hi,  I've done some analysis on a server and have discovered the Single Nic total bytes is averaging on 52% despite the network utilisation being 15%. (All other device counters are OK).
Can i ask, if i team the Nic, do they both work at the same time thus reducing the load on the single nic or does teaming simply act as fail-over. Also, slots permitting, is it possible to team more than one card, ie. could all 4 be part of one team?
Thanks for looking.
0
Comment
Question by:Jason Thomas
3 Comments
 
LVL 70

Expert Comment

by:KCTS
ID: 22633587
Teaming NICs may improve throughput a bit - but as only one NIC can transmit on the network at once, you will not double throughput by teaming - its essentailly a fail-over.
0
 
LVL 1

Author Comment

by:Jason Thomas
ID: 22634796
Thank you. Are there any suggestions on how to reslve the issue, other than splitting the data across two physical servers?
Thank you.
0
 
LVL 32

Accepted Solution

by:
aleghart earned 500 total points
ID: 22638499
> only one NIC can transmit on the network at once

Not completely true.  This is true when the server and clients are on different subnets.  If they are on the same broadcast subnet (i.e. 192.168.1.x), "smart" load balancing occurs by using a team IP address.  The MAC of each NIC is broadcast with the team IP address.

You can also setup multiple ports with link aggregation (if supported on the switch).  This simplifies the teaming.

From Broadcom (used by Dell):

Smart Load Balancing enables both transmit and receive load balancing based on the Layer 3/Layer 4 IP address and TCP/UDP port number. In other words, the load balancing is not done at a byte or frame level but on a TCP/UDP session basis. This methodology is required to maintain in-order delivery of frames that belong to the same socket conversation. Load balancing is supported on 2-8 ports.


I've attached a Broadcom/Dell whitepaper on teaming.  Similar team types are available with 3Com and Intel NICs.  The best method is with matched NICs from the same vendor.


broadcom-nic-teaming-1.1-final.doc
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

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

NTFS file system has been developed by Microsoft that is widely used by Windows NT operating system and its advanced versions. It is the mostly used over FAT file system as it provides superior features like reliability, security, storage, efficienc…
This tutorial shows how to create a greeting card by combining two image layers and a text layer on a PC using a free image editing app.
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

773 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