Solaris 11 Express NAT/Router IP Fragments Post: 302511918

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Special Forums IP Networking Solaris 11 Express NAT/Router IP Fragments Post 302511918 by vectox on Friday 8th of April 2011 12:59:20 AM

04-08-2011

Registered User

Solaris 11 Express NAT/Router IP Fragments

Upon replacing my linux router/server with a Solaris one I've noticed very poor network performance. The server itself has no issues connecting to the net, but clients using the server as a router are getting a lot of IP fragments as indicated from some packet sniffing I conducted.

Here was my old setup.
<DSL_Modem>-<Linux Router>-<switch>-<wifi>-<macbook>
- this setup works fine, with no fragmentation or performance issues

Setup 1
<DSL_Modem>-<Sol 11 Router>-<switch>-<wifi>-<macbook>
- this setup has major packet fragmentation

Setup 2 (taking wifi out of the flow)
<DSL_Modem>-<Sol 11 Router>-<switch>-<macbook>
- this setup has major packet fragmentation

I played with various MTU settings on the solaris server internal NIC, but it made no difference so I tried a couple of things with the client box.

I determined the max MTU I could send from my macbook as 1464 without getting fragmentation by using:
ping -D -s 1464 <any internet ip>

Once I manually set my MTU down to 1464 on my macbook instead of the default 1500 web pages started loading normally. So here's the problem...why do I have to manually set the MTU on the client macbook when I have my solaris server setup as a router. Is there some network related tuning I can perform on the server that will address these issues?

vectox

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LEARN ABOUT LINUX

setupcon

setupcon(1)							   User Manuals 						       setupcon(1)

NAME

       setupcon - sets up the font and the keyboard on Linux console

SYNOPSIS

       setupcon [ option ]... [ variant ... ]

DESCRIPTION

       setupcon is a program for fast and easy setup of the font and the keyboard on the Linux console.

OPTIONS

       -k, --keyboard-only
	      Setup the keyboard only, do not setup the font.

       -f, --font-only
	      Setup the font only, do not setup the keyboard.

       --force
	      Do  not  check  whether  we are on the console.  Notice that you can be forced to hard-reboot your computer if you run setupcon with
	      this option and you are on a X server.

       -v, --verbose
	      Be more verbose.	 Use this option if something goes wrong.

       --save If you want to use setupcon early in the boot process, it is possible that /usr is not yet mounted and the  required  data  are  not
	      available.   This  option  makes	setupcon copy the required data in /etc/console-setup in order to make it available before /usr is
	      mounted.	If you use setupcon early in the boot process, then use this option whenever you change the console configuration.

       --save-only
	      Same like --save, but do not setup the keyboard and the font.  This option can be useful if you run setupcon in a X server.

       -h, --help
	      Display usage information.

       variant
	      Specifies which configuration file to use.  By default the configuration file of setupcon is /etc/default/console-setup but  if  you
	      use  e.g. "chukchi" as variant then the configuration file will be /etc/default/console-setup.chukchi.  This allows you to have sev-
	      eral different configurations - for example one for the Chukchi language and another in /etc/default/console-setup for your  default
	      configuration.

BASIC USAGE

       Most of the time you invoke setupcon without arguments.	Please look at the README file for more information.

AUTHOR

       Anton Zinoviev <anton@lml.bas.bg>, <zinoviev@debian.org>

console-setup							     APR 2007							       setupcon(1)