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<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It’s Tuesday morning and that means question time <span style="font-family:Wingdings">
J</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So from <a href="http://www.ibm.com/support/knowledgecenter/STXKQY_4.2.0/com.ibm.spectrum.scale.v4r2.adv.doc/bl1adv_cesnetworkconfig.htm">
http://www.ibm.com/support/knowledgecenter/STXKQY_4.2.0/com.ibm.spectrum.scale.v4r2.adv.doc/bl1adv_cesnetworkconfig.htm</a>, I’ve extracted the following:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:18.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-GB">How to use an alias<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-GB">To use an alias address for CES, you need to provide a static IP address that is not
already defined as an alias in the </span><span style="font-size:12.0pt;font-family:"Courier New";mso-fareast-language:EN-GB">/etc/sysconfig/network-scripts</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-GB">
directory.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-GB">Before you enable the node as a CES node, configure the network adapters for each subnet that are represented in the CES address pool:<o:p></o:p></span></p>
<ol start="1" type="1">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-GB">Define a static IP address for the device:<o:p></o:p></span></li></ol>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB">/etc/sysconfig/network-scripts/ifcfg-eth0<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB">DEVICE=eth1<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB"><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB">BOOTPROTO=none<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB"><span style="mso-list:Ignore">5.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB">IPADDR=10.1.1.10<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB"><span style="mso-list:Ignore">6.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB">NETMASK=255.255.255.0<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB"><span style="mso-list:Ignore">7.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB">ONBOOT=yes<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB"><span style="mso-list:Ignore">8.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB">GATEWAY=10.1.1.1<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB">TYPE=Ethernet<o:p></o:p></span></p>
<ol start="9" type="1">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-GB">Ensure that there are no aliases that are defined in the network-scripts directory for this interface:<o:p></o:p></span></li></ol>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB"><span style="mso-list:Ignore">10.</span></span><![endif]><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB"># ls -l /etc/sysconfig/network-scripts/ifcfg-eth1:*<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-GB">ls: /etc/sysconfig/network-scripts/ifcfg-eth1:*: No such file or directory<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-GB">After the node is enabled as a CES node, no further action is required. CES addresses
are added as aliases to the already configured adapters.<o:p></o:p></span></p>
<p class="MsoNormal">Now, does this mean for every floating (CES) IP address I need a separate ifcfg-ethX on each node? At the moment I simply have an ifcfg-X file representing each physical network adapter, and then the CES IPs defined. I can see IP addresses
being added during failover to the primary interface, but now I’ve read I potentially need to create a separate file. What’s the right way to move forward? If I need separate files, I presume the listed IP is a CES IP (not system) and does it also matter what
X is in ifcfg-ethX?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many thanks<o:p></o:p></p>
<p class="MsoNormal">Richard<o:p></o:p></p>
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