<div dir="ltr"><span style="font-size:14px">Yes,I don't understand why Neutron needs enable ip_forward and disable RPF.</span><div><span style="font-size:14px">And I also don't understand where the neutron need this config during the instance connect to the extrernal network.</span></div><div><span style="font-size:14px"><br></span></div><div><span style="font-size:14px">I read the neutron code, found when the L3 agent creating, it needs the ip_forward config,but i'm not find the RPF config in the neutron code.<br></span><div><span style="font-size:14px"><br></span></div><div><span style="font-size:14px">Thank you very much!</span></div><div><span style="font-size:14px"><br></span><div class="gmail_extra"><br><div class="gmail_quote">2015-11-11 18:25 GMT+08:00 JinXing F <span dir="ltr"><<a href="mailto:jinxing.f@gmail.com" target="_blank">jinxing.f@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr">
<p><span>Hi, guys:</span></p><p><span> during the neutron installation guide, I found that we need to config the linux kernel as bellow: </span></p><p><span>net.ipv4.ip_forward=1</span></p>
<p><span>net.ipv4.conf.all.rp_filter=0</span></p>
<p><span>net.ipv4.conf.default.rp_filter=0</span></p><p><span><br></span></p><p><span>the first one is the ip address translation between LAN and WLAN, the second and third command is used for "</span>Reverse Path Filtering".</p><p>I cann't understand the purpose of the config in the neutron.</p><p>1. If the instance in compute node connect with exteral network,what's the function of the three config?</p><p>2. The instance connect with each others, what's the function of the three config?</p><p><br></p><p>I am very confused about this config.Please explain the answer to me. </p><p>Thanks. </p>
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