Solved

Which will be best MTU

Posted on 2009-05-12
7
612 Views
Last Modified: 2012-08-14
Which will be best MTU size for our company systems?

By which internet browsing/downloading will be faster.

We have
- Peer 2 Peer environment
- Desktops / Laptops
- 22 Systems
- OS = Windows XP SP2 & Windows Vista
- 2 Mbps (1:2) leased line internet.
- Cyberoam C25i is acting as Router+Firewall+UTM

What steps shall i take?
0
Comment
Question by:VINOD MORE
[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
7 Comments
 
LVL 31

Accepted Solution

by:
Frosty555 earned 75 total points
ID: 24371641
In general you shouldn't mess with it. Too big and it will exceed the MTU size of the physical network protocol, which forces the router to split packets unnecessarily. Too small and the packets get fragmented up too much.

1500 is the default. However PPPoE and some other devices sometimes choke on a number that big. To be safe, a lot of routers set the MTU size by default to 1492, which is just right.

In any case, as far as internet  browsing goes, MTU size will not affect performance. Internet is just too slow for it to matter. So don't mess with it unless you are experiencing network problems.
0
 
LVL 48

Assisted Solution

by:dbrunton
dbrunton earned 100 total points
ID: 24372151
0
 
LVL 10

Assisted Solution

by:lanboyo
lanboyo earned 50 total points
ID: 24374985
The only reason to change MTU is if you have or plan to have a lot of GRE or IPSec tunnels, or both.
0
Portable, direct connect server access

The ATEN CV211 connects a laptop directly to any server allowing you instant access to perform data maintenance and local operations, for quick troubleshooting, updating, service and repair.

 
LVL 50

Assisted Solution

by:jcimarron
jcimarron earned 25 total points
ID: 24378468
vinodmore--This reference answers many questions and offers a tool (DrTCP) to help you determine the best settings for MTU, RWIN etc.
http://www.broadbandreports.com/faq/tweaks
0
 
LVL 1

Author Comment

by:VINOD MORE
ID: 24381698
Thanks for comments

I have do this on Local systems (i mean DrTCP MTU settings) or on Router interface.

What is default MTU for Windows XP & Windows Vitsa?

0
 
LVL 48

Assisted Solution

by:dbrunton
dbrunton earned 100 total points
ID: 24381757
The default settings are in the link I gave above.  Usually 1500 but it may be necessary to drop according to circumstances.

Also see

http://www.pctools.com/guides/registry/detail/280/

http://help.expedient.com/broadband/mtu.shtml

http://support.microsoft.com/kb/283165
0
 
LVL 10

Assisted Solution

by:lanboyo
lanboyo earned 50 total points
ID: 24383998
Dropping on the router interface only helps in the case of outbound traffic usually.


If you have no plans to tunnel through ipsec or gre tunnels or use pppoe, you really don't need to do anything.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say 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

Suggested Solutions

Title # Comments Views Activity
Setup static routes for IP address in CentOS 2 67
Undo a Print Server Setup 5 95
How to open a zip file 4 119
Expanding Subnet Mask 20 202
Sometimes people don't understand why download speed shows differently for Windows than Linux.Specially, this article covers and shows the solution for throughput difference for Windows than a Linux machine. For this, I arranged a test scenario.I…
Network ports are the threads that hold network communication together. They are an essential part of networking that can be easily ignore or misunderstood, my goals is to show those who don't have a strong network foundation how network ports opera…
The Task Scheduler is a powerful tool that is built into Windows. It allows you to schedule tasks (actions) on a recurring basis, such as hourly, daily, weekly, monthly, at log on, at startup, on idle, etc. This video Micro Tutorial is a brief intro…
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…

763 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