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
345 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
[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 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

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

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…
First of all let me say that the only language that I speak is English, but in answering questions here I often come across people whose English skills are not the best and I’d like to be able to communicate better with them, and the following descr…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …
In this video you will find out how to export Office 365 mailboxes using the built in eDiscovery tool. Bear in mind that although this method might be useful in some cases, using PST files as Office 365 backup is troublesome in a long run (more on t…

636 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