LinuxQuestions.org
Register a domain and help support LQ
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Networking
User Name
Password
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.

Notices

Reply
 
Search this Thread
Old 06-26-2006, 03:45 PM   #1
lazlow
Senior Member
 
Registered: Jan 2006
Posts: 4,362

Rep: Reputation: 172Reputation: 172
GigE 10/100 Jumbo Frames mixing


Hey Guys

Be kind, I know just enough to be dangerous.

Previous setup was 4 desktops(10/100) + 1 wireless notebook tied into one wireless router with 4 ports.

Starting with my current project, I bonded two 10/100 nics together (/machine on two machines)in mode 6 (high throughput bidirectional no failover) with all four nics tied to the router. This jumped my speed by about 1.8X when moving 10gb (not mb) files. For this project to work I will be needing more speed so I am going to switch to GigE ( I am aware of the HD/pci bus speed limitations and I am not concerned about that for now). The plan is to get a GigE 8 port switch and insert it between the machines and the router(bringing my other machines back online). I am aware that this will not increase my speed going out to the internet, only speed up machine/machine transfers.

The question is, how well do switches handle mixing 10/100 and GigE?
I assume that GigE to GigE will be fine even with the other 10/100 machines attached (correct?). GigE to 10/100 and the GigE will "shift down" to 10/100 (correct?). And the same for the GigE going out to the net through the router (correct?). Now add Jumbo frames into the equation and answer all the above questions again (the data I have suggests a 20 to 30% throughput increase using jumbo frames).

Any suggestions for this switchor in general?(You guessed it, money is an issue) I had heard that netegear stuff has a arp(sp?) problem with linux leading to ping incompletion(true?).

Thanks
lazlow
 
Old 06-26-2006, 04:12 PM   #2
scheidel21
Senior Member
 
Registered: Feb 2003
Location: CT
Distribution: Debian PPC/i386/AMD64 6/7, Vista, XP , WIN7, Server 03/08
Posts: 1,287

Rep: Reputation: 97
I have to do a little research regarding Jumbo frames but you are right about the different speeds mixing ok. The way which most switches work are they set up virtual paths between computers and there is usually a buffer if data transfer gets too great excceding the ability for the recieving machine to recieve. In this case that buffer will be able to hold info from multiple sources (clients) and the server recieving shouldnt be the issue. The Jumbo frames thing I believe won't work well if most of your clients are going to be 10/100 because Jumbo frames are for high speed situations. Let me do som research and get back to you with better info though.

Alex
 
Old 06-28-2006, 05:28 PM   #3
lazlow
Senior Member
 
Registered: Jan 2006
Posts: 4,362

Original Poster
Rep: Reputation: 172Reputation: 172
scheidel21

I ran accross and article entitled :'Squeeze Your Gigabit NIC for Top Performance". Not too much on Jumbo Frames but useful. http://www.enterprisenetworkingplane...le.php/3485486

At least it seemd so last night at 3am.

Lazlow
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
AS 2.4.9-e38 SIOCSIFMTU: Invalid argument trying to use jumbo frames on a bond IsaacHunt Linux - Networking 3 02-21-2013 03:35 PM
enabling jumbo large packets Furlinastis Linux - Networking 2 05-28-2006 12:13 PM
video with Debian: dropped frames, 100% CPU usage in playback gregmcavoy Linux - Software 0 01-07-2006 10:39 PM
Possible to create a frames effect in an HTML page without using frames? furfurdemon666 General 10 12-12-2004 06:52 AM
Mixing 10 MBit & 100 MBit Ethernet VorlonInfoTech Linux - Hardware 2 07-25-2004 09:25 PM


All times are GMT -5. The time now is 12:29 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration