130 lines
7.4 KiB
HTML
130 lines
7.4 KiB
HTML
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<meta name="DC.Title" content="Maximum Ethernet frame sizes" />
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<meta name="abstract" content="Understand the maximum Ethernet frame sizes." />
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<title>Maximum Ethernet frame sizes</title>
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<body id="rzajymaximumethernetframesize"><a name="rzajymaximumethernetframesize"><!-- --></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 Ethernet frame sizes</h1>
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<div><p>Understand the maximum Ethernet frame sizes.</p>
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<div class="section"><p>The largest frame size used during the connection process is controlled
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by the maximum frame size configurations of multiple items. The maximum frame
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size for the connection is also influenced by exchange identifier negotiations
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and bridge considerations. Note that TCP/IP and SNA connections are limited
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by slightly different sets of items.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">TCP/IP connections</h4><p><strong></strong> The maximum frame size
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is associated with:</p>
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<ul><li>the Ethernet standard that you select</li>
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<li>the line description (Gigabit Ethernet only)</li>
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<li>each service access point (SAP)</li>
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<li>the TCP/IP interface</li>
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</ul>
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</div>
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<div class="section"><h4 class="sectiontitle">SNA connections</h4><p><strong></strong> The maximum frame size is
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associated with:</p>
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<ul><li>the controller</li>
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<li>the Ethernet standard that you select</li>
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<li>each service access point (SSAP)</li>
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</ul>
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<p>During the connection process, your server selects the smallest common
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value of the maximum frame values. As stated above, the actual maximum frame
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size used can become even smaller, if the bridge cannot support the value
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selected by the server.</p>
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<p>The following table shows the maximum frame
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sizes that are associated with the Ethernet standard that you select through
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the Ethernet standard (ETHSTD) field.</p>
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</div>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" class="singleborder" frame="border" border="1" rules="all"><thead align="left"><tr class="tablemainheaderbar"><th rowspan="2" valign="top" width="25.914149443561207%" id="d0e61">ETHSTD parameter value</th>
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<th rowspan="2" valign="top" width="27.821939586645467%" id="d0e63">Frame type used</th>
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<th colspan="2" align="center" valign="top" id="d0e65">Maximum
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frame size in bytes</th>
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</tr>
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<tr class="tablemainheaderbar"><th valign="top" width="9.538950715421304%" id="d0e68">SNA<sup>4</sup></th>
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<th valign="top" width="36.72496025437202%" id="d0e72">TCP/IP</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" width="25.914149443561207%" headers="d0e61 ">*IEEE8023 <sup>1</sup></td>
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<td valign="top" width="27.821939586645467%" headers="d0e63 ">IEEE 802.3</td>
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<td valign="top" width="9.538950715421304%" headers="d0e65 d0e68 ">1496</td>
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<td valign="top" width="36.72496025437202%" headers="d0e65 d0e72 "> <p><span><img src="./delta.gif" alt="Start of change" />8992 (1 Gbps/10 Gbps Ethernet)<img src="./deltaend.gif" alt="End of change" /></span><br />
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1492 (all others)</p>
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</td>
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</tr>
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<tr><td valign="top" width="25.914149443561207%" headers="d0e61 ">*ETHV2<sup>2</sup></td>
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<td valign="top" width="27.821939586645467%" headers="d0e63 ">Ethernet version 2</td>
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<td valign="top" width="9.538950715421304%" headers="d0e65 d0e68 ">1493</td>
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<td valign="top" width="36.72496025437202%" headers="d0e65 d0e72 "> <p>9000 <span><img src="./delta.gif" alt="Start of change" />8992 (1 Gbps/10 Gbps Ethernet)<img src="./deltaend.gif" alt="End of change" /></span><br />
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1500 (all others)</p>
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</td>
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</tr>
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<tr><td rowspan="2" align="left" valign="top" width="25.914149443561207%" headers="d0e61 ">*ALL<sup>3</sup></td>
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<td align="left" valign="top" width="27.821939586645467%" headers="d0e63 ">IEEE 802.3</td>
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<td align="left" valign="top" width="9.538950715421304%" headers="d0e65 d0e68 ">1496</td>
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<td valign="top" width="36.72496025437202%" headers="d0e65 d0e72 "> <p>8992 (1 Gbps/10 Gbps Ethernet)<br />
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1492 (all others)</p>
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</td>
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</tr>
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<tr><td align="left" valign="top" width="27.821939586645467%" headers="d0e63 ">Ethernet version 2</td>
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<td valign="top" width="9.538950715421304%" headers="d0e65 d0e68 ">1493</td>
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<td valign="top" width="36.72496025437202%" headers="d0e65 d0e72 "> <p>9000 <span><img src="./delta.gif" alt="Start of change" />8992 (1 Gbps/10 Gbps Ethernet)<img src="./deltaend.gif" alt="End of change" /></span><br />
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1500 (all others)</p>
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</td>
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</tr>
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<tr><td colspan="4" align="left" valign="top" headers="d0e61 d0e63 d0e65 d0e68 d0e72 "> <div class="note"><span class="notetitle">Notes:</span> <ol><li>IEEE 802.3 standard.</li>
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<li>Ethernet version 2 standard.</li>
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<li>Network uses both Ethernet standards (IEEE 802.3 and Ethernet version
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2).</li>
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<li>For 1 Gbps and 10 Gbps cards, Enterprise Extender orAnyNet<sup>®</sup> is required
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to use SNA. For more information, see the APPC, APPN, and HPR
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topic in the iSeries information center.</li>
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</ol>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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</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 class="relref"><strong>Related reference</strong><br />
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<div><a href="rzajysnaserviceaccesspoints.htm">SNA service access points (SAPs)</a></div>
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<div><a href="rzajybridgesdroppingframes.htm">Remote bridges dropping frames</a></div>
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<div><a href="rzajyincreasegigabitethernetperf.htm">Increase Gigabit and 10 Gigabit Ethernet performance</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../rzahj/rzahjovr.htm">APPC, APPN, and HPR</a></div>
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</div>
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</div>
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</body>
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