How to set MTU size on Linux Enterprise Server 9

How do I lower MTU size on SUSE LINUX Enterprise Server 9?  This is needed for troubleshooting the fragmentation problems.
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MashaCPAAsked:
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woolmilkporcCommented:
ifconfig interface mtu x

e.g.

ifconfig eth0 mtu 1400

wmp


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MashaCPAAuthor Commented:
Will this result in a permanent change, or until the next reboot, like ip link set dev eth0 mtu 1400?
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cybervzhn_techCommented:
In order for the MTU change to be presistent across reboot, you must update configuration files.  

The files for the ethernet adpaters are located here on SuSE 9.

   /etc/sysconfig/network/ifcfg-*

For example if you are referring to the first ethernet port it would be etc/sysconfig/network/ifcfg-eth0

Add the following:

MTU='1400'

This page has a pretty good one page summay for Suse network configuration.
http://openskill.info/infobox.php?ID=949 
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MashaCPAAuthor Commented:
Thank you!
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