115 lines
6.4 KiB
HTML
115 lines
6.4 KiB
HTML
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<meta name="DC.Title" content="Additional MAXFRAME parameter considerations" />
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<title>Additional MAXFRAME parameter considerations</title>
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</head>
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<body id="rzak3addmaxframe"><a name="rzak3addmaxframe"><!-- --></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">Additional MAXFRAME parameter considerations</h1>
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<div><div class="section"> <p>You need to base the maximum frame size on your iSeries™ system
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on the following values:</p>
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<ul><li>N203</li>
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<li>Maximum frame size supported by the protocol or connection type</li>
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<li>Maximum frame size supported by the remote station</li>
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</ul>
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</div>
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<div class="section"><p>Use the minimum of these values, minus the adjustment
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for the protocol header, to configure the MAXFRAME parameter for frame-relay
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connections. <a href="#rzak3addmaxframe__rzak3size">Table 1</a> shows the maximum
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frame size limits for supported connection types.</p>
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</div>
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<div class="tablenoborder"><a name="rzak3addmaxframe__rzak3size"><!-- --></a><table cellpadding="4" cellspacing="0" summary="" id="rzak3addmaxframe__rzak3size" class="singleborder" frame="border" border="1" rules="all"><caption>Table 1. Maximum frame size limits for connection types</caption><thead align="left"><tr><th align="left" valign="top" width="50%" id="d0e41">Connection type</th>
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<th align="left" valign="top" width="50%" id="d0e43">Maximum frame size (MAXFRAME parameter)
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limits</th>
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</tr>
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</thead>
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<tbody><tr><td align="left" valign="top" width="50%" headers="d0e41 ">Systems Network Architecture (SNA) direct</td>
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<td align="left" valign="top" width="50%" headers="d0e43 ">8 182</td>
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</tr>
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<tr><td align="left" valign="top" width="50%" headers="d0e41 ">IP direct</td>
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<td align="left" valign="top" width="50%" headers="d0e43 ">8 190</td>
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</tr>
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<tr><td align="left" valign="top" width="50%" headers="d0e41 ">HPR</td>
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<td align="left" valign="top" width="50%" headers="d0e43 ">8 186</td>
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</tr>
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<tr><td align="left" valign="top" width="50%" headers="d0e41 ">Bridged token-ring</td>
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<td align="left" valign="top" width="50%" headers="d0e43 ">8 148</td>
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</tr>
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<tr><td align="left" valign="top" width="50%" headers="d0e41 ">Bridged DDI</td>
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<td align="left" valign="top" width="50%" headers="d0e43 ">4 444</td>
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</tr>
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<tr><td align="left" valign="top" width="50%" headers="d0e41 ">Bridged Ethernet</td>
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<td align="left" valign="top" width="50%" headers="d0e43 ">1 496 for ETHSTD(*IEEE8023) <p>1 500 for
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non-SNA data using ETHSTD(*ETHV2)</p>
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<p>1 493 for SNA data using ETHSTD(*ETHV2)</p>
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</td>
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</tr>
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<tr><td colspan="2" align="left" valign="top" headers="d0e41 d0e43 "> <div class="note"><span class="notetitle">Note:</span> At this
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time, the largest value allowed for the MAXFRAME parameter on the CRTLINFR
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command is 8182.</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 class="section"><p>You can configure the maximum frame size used for a connection
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at several levels of the iSeries configuration:</p>
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</div>
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<div class="section"> <dl><dt class="dlterm">Line description MAXFRAME parameter</dt>
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<dd>Specify the maximum frame size used for an individual
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permanent virtual circuit (PVC) on the MAXFRAME parameter of the frame-relay,
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token-ring, or distributed data interface (DDI) line description. <p>You
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cannot configure the MAXFRAME parameter on Ethernet line descriptions. Ethernet
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local area networks (LANs) normally use a frame size of 1500 bytes. A N203
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value of 1600 for Ethernet connections to accommodate the standard 1500-byte
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frame size is recommended. For a N203 value less than 1600, you need to configure
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the maximum frame size on either the line description source service access
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point (SSAP) parameter or the controller description.</p>
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</dd>
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<dt class="dlterm">Line description SSAP parameter</dt>
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<dd>You can specify the maximum frame size for an individual SSAP for the
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maximum frame size element of the line description SSAP parameter.</dd>
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<dt class="dlterm">Controller description MAXFRAME parameter</dt>
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<dd>You can specify the maximum frame size for connections to individual remote
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stations on the controller description MAXFRAME parameter.</dd>
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</dl>
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</div>
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<div class="section"><p>The iSeries system
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uses the smallest of the above values when selecting the maximum frame size
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used for connection to the remote station. For SNA connections, the system
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might also negotiate the frame size downward, based on the exchange identifier
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(XID) exchange with the remote station.</p>
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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="rzak3rzak3sizeconsid.htm" title="This topic helps you determine the value of the maximum frame size.">Maximum frame-size parameter requirements for frame relay</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzak3rzak3sizeconsid.htm" title="This topic helps you determine the value of the maximum frame size.">Maximum frame-size parameter requirements for frame relay</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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