61 lines
3.7 KiB
HTML
61 lines
3.7 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Maximum LAN frame sizes" />
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<meta name="abstract" content="Learn about frame size configuration and troubleshooting." />
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<meta name="description" content="Learn about frame size configuration and troubleshooting." />
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<meta name="DC.Relation" scheme="URI" content="rzajyunderstandingethernetsupport.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1999, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1999, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzajymaxlanframesize" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Maximum LAN frame sizes</title>
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</head>
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<body id="rzajymaxlanframesize"><a name="rzajymaxlanframesize"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Maximum LAN frame sizes</h1>
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<div><p>Learn about frame size configuration and troubleshooting.</p>
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<p>The larger your frame size, the more data your server can pack into it.
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Hence, you can increase your data throughput. Typically you set
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the maximum frame size to the largest size that is supported by your input/output
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adapter (IOA). However, a device along the way will drop the frame if it cannot
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support the larger size. </p>
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<p>For example, if frames are being sent to a remote system on a different
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LAN, the frame must be go through a bridge to be retransmitted to the remote
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LAN. If the bridge cannot support the frame size that your LAN is using, the
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frame will be dropped or discarded. In the Ethernet environment, no indication
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of the smaller frame size of the bridge is received. The problem will be detected
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when a connection with the remote system is established and a CPA57A1 message
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is sent to the configured message queue.</p>
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<div class="p">If you cannot configure the device to support your frame size, you must
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decrease your maximum frame size to a size that the device can support. You
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can change one or more of the following maximum frame size fields (location
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of the field in parentheses): <ul><li>SSAP maximum frame parameter (line description)</li>
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<li><img src="./delta.gif" alt="Start of change" />Maximum frame size (line descriptions for token ring, Gigabit
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and 10 Gigabit Ethernet networks)<img src="./deltaend.gif" alt="End of change" /></li>
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<li>Maximum frame size (controller description)</li>
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</ul>
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If any adjustments are made, it is recommended that the MAXFRAME value
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on the controller description be adjusted as well.</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzajyunderstandingethernetsupport.htm" title="Understand and use Ethernet frames, connections, and functions.">Ethernet support</a></div>
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</div>
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</div>
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</body>
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</html>
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