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Clarify MTU/BUFSIZE in apps/ README.txt files and Documentation

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This commit is contained in:
Gregory Nutt 2014-11-16 08:50:36 -06:00
parent 118b511a95
commit 1cfdfdac48
1 changed files with 5 additions and 3 deletions
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8
Documentation/NuttShell.html
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@ -2605,7 +2605,7 @@ nsh>
<tr>
<td><b><code>get</code></b></td>
<td><code>CONFIG_NET</code> &amp;&amp; <code>CONFIG_NET_UDP</code> &amp;&amp;
<code>CONFIG_NFILE_DESCRIPTORS</code> &gt; 0 &amp;&amp; <code>CONFIG_NET_BUFSIZE</code> &gt;= 558<sup>1</sup></td>
<code>CONFIG_NFILE_DESCRIPTORS</code> &gt; 0 &amp;&amp; <i>MTU</i> &gt;= 558<sup>1</sup></td>
<td><code>CONFIG_NSH_DISABLE_GET</code></td>
</tr>
<tr>
@ -2711,7 +2711,7 @@ nsh>
<tr>
<td><b><code>put</code></b></td>
<td><code>CONFIG_NET</code> &amp;&amp; <code>CONFIG_NET_UDP</code> &amp;&amp;
<code>CONFIG_NFILE_DESCRIPTORS</code> &gt; 0 &amp;&amp; <code>CONFIG_NET_BUFSIZE</code> &gt;= 558<sup>1,2</sup></td>
<code>CONFIG_NFILE_DESCRIPTORS</code> &gt; 0 &amp;&amp; <i>MTU</i> &gt;= 558<sup>1,2</sup></td>
<td><code>CONFIG_NSH_DISABLE_PUT</code></td>
</tr>
<tr>
@ -3254,10 +3254,12 @@ set FOOBAR ABC_${FOO}_${BAR}
</td>
</tr>
<tr>
<td valign="top"><b><code>CONFIG_NET_BUFSIZE=650</code></b> (or larger)</td>
<td valign="top"><b><code>CONFIG_NET_ETH_MTU=650</code></b> (or larger)</td>
<td>
Per RFC2131 (p. 9), the DHCP client must be prepared to receive DHCP messages of up to
576 bytes (excluding Ethernet, IP, or UDP headers and FCS).
NOTE: Note that the actual MTU setting will depend upon the specific link protocol.
Here Ethernet is indicated.
</td>
</tr>
</table></center>