https://systems.nic.uoregon.edu/internal-wiki/index.php?action=history&feed=atom&title=Procedure%3AAIX_jumbo_frames 2026-08-19T09:24:45Z Revision history for this page on the wiki MediaWiki 1.39.12 https://systems.nic.uoregon.edu/internal-wiki/index.php?title=Procedure:AIX_jumbo_frames&diff=3010&oldid=prev 2020-02-04T02:03:59Z

<p>Created page with &quot;How to configure jumbo frames (&gt;1500 byte MTU) under AIX Note: The interface must be down and unconfigured in order to change the ethernet adapter hardware characteristics....&quot;</p> <p><b>New page</b></p><div>How to configure jumbo frames (&gt;1500 byte MTU) under AIX<br /> <br /> <br /> Note: The interface must be down and unconfigured in order to change the ethernet adapter hardware characteristics. You must be accessing the system via a local console or secondary network interface in order to make these changes.<br /> <br /> # Log into the AIX system, and start SMIT<br /> # In SMIT, select the following menu items:<br /> #* Devices<br /> #* Communication<br /> #* Ethernet Adapter<br /> #* Adapter<br /> #* Change / Show Characteristics of an Ethernet Adapter<br /> #* Select the interface in question from the list<br /> # Change '''Transmit jumbo frames''' to 'yes'<br /> # Press 'enter' to make the change<br /> # Hit F3 or &lt;esc&gt;3 until you're back out to the main menu (System Management)<br /> # Select the following menu items:<br /> #* Communications Applications and Services<br /> #* TCP/IP<br /> #* Further Configuration<br /> #* Network Interfaces<br /> #* Network Interface Drivers<br /> #* Select the interface in question from the list<br /> #* Ensure that '''Maximum IP PACKET SIZE for THIS DEVICE''' is set to '9000'<br /> <br /> == Command line ==<br /> The following two operations will make the above changes, but also require a reboot to effect. The plus side is you can do them while the interface is up.<br /> <br /> Replace ent2/en2 in the example with the device names required on your system - ie, ent1/en1 on the JS20s.<br /> &lt;pre&gt;<br /> chdev -Pl ent2 -a jumbo_frames=yes<br /> chdev -Pl en2 -a mtu=9000<br /> &lt;/pre&gt;<br /> <br /> [[Category:Procedures]]</div>

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