Add FAQ 97a

This commit is contained in:
Tom Eastep 2011-10-14 11:27:44 -07:00
parent bf6ea13898
commit efb768464c

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@ -2256,6 +2256,36 @@ eth0 External 50mbit:200kb 5.0mbit:100kb:200ms:100mbit:<emphasis
<programlisting><emphasis role="bold">ethtool -k eth<emphasis>N</emphasis> tso off gso off</emphasis></programlisting>
</section>
<section>
<title>(FAQ 97a) I enable Shorewall traffic shaping and now my download
rate is way below what I specified</title>
<para><emphasis role="bold">Answer</emphasis>: This is likely due to
Generic Receive Offload (GRO) being enabled in the network adapter. To
verify, install the <firstterm>ethtool</firstterm> package and use the
-k command:</para>
<programlisting>root@gateway:/etc/shorewall# ethtool -k eth1
Offload parameters for eth1:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp-segmentation-offload: on
udp-fragmentation-offload: off
generic-segmentation-offload: on
generic-receive-offload: <emphasis role="bold">on</emphasis>
large-receive-offload: off
ntuple-filters: off
receive-hashing: off
root@gateway:/etc/shorewall#
</programlisting>
<para>To work around the issue, use this command:</para>
<programlisting><emphasis role="bold">ethtool -k eth</emphasis>N <emphasis
role="bold">gro off</emphasis></programlisting>
</section>
</section>
<section id="About">