hi Experts,<br>               I has few question on ccsd:<br>1. what is the purpose of ccsd listening on ipv4 and ipv6 addresses as follows in my 2 node HA setup? We do not use IPv6 in our setup.<br><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId" content="Word.Document"><meta name="Generator" content="Microsoft Word 14"><meta name="Originator" content="Microsoft Word 14"><link rel="File-List" href="file:///C:%5CUsers%5Cagudhe%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_filelist.xml"><link rel="themeData" href="file:///C:%5CUsers%5Cagudhe%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_themedata.thmx"><link rel="colorSchemeMapping" href="file:///C:%5CUsers%5Cagudhe%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_colorschememapping.xml"><style>
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<p class="MsoNormal"><span style="color:rgb(31,73,125)">netstat -antp |grep ccsd</span></p>

<p class="MsoNormal"><span style="color:rgb(31,73,125)">tcp       
0      0
<a href="http://0.0.0.0:50008">0.0.0.0:50008</a>              
0.0.0.0:*                  
LISTEN      18170/ccsd</span></p>

<p class="MsoNormal"><b><span style="color:rgb(31,73,125)">tcp       
0      0
::1:50006                  
:::*                       
LISTEN      18170/ccsd</span></b></p>

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<p class="MsoNormal"><br><b><span style="color:rgb(31,73,125)"></span></b></p><p class="MsoNormal"><b><span style="color:rgb(31,73,125)">CCSD is invoked without any arguments:<br></span></b></p><p class="MsoNormal"><b><span style="color:rgb(31,73,125)">root    
18170     1  0 14:12
?        00:00:00 /sbin/ccsd</span></b></p>

<br>2.  Is it not sufficient to use IPv4 only by CCSD?<br><br>3. Sometimes on node reboot we see messages as follows:<br><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId" content="Word.Document"><meta name="Generator" content="Microsoft Word 14"><meta name="Originator" content="Microsoft Word 14"><link rel="File-List" href="file:///C:%5CUsers%5Cagudhe%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_filelist.xml"><link rel="themeData" href="file:///C:%5CUsers%5Cagudhe%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_themedata.thmx"><link rel="colorSchemeMapping" href="file:///C:%5CUsers%5Cagudhe%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_colorschememapping.xml"><style>
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<p class="MsoPlainText">"Unable to bind to backend ipv6 socket, but
inet_ntop returned NULL pointer: Address already in use"</p>Does anyone know when is this problem seen?<br><br>4. If I invoke CCSD with "-4" option, will I get rid of the above message? since ipv6 code path will not hit.<br>
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<p class="MsoNormal"><b><span style="color:rgb(31,73,125)">root      
461     1  0 14:28
?        00:00:00 /sbin/ccsd -4</span></b></p>

<p class="MsoNormal"><span style="color:rgb(31,73,125)"></span></p>

<p class="MsoNormal"><span style="color:rgb(31,73,125)">netstat
-antp  |grep ccsd</span></p>

<p class="MsoNormal"><b><span style="color:rgb(31,73,125)">tcp       
0      0
<a href="http://127.0.0.1:50006">127.0.0.1:50006</a>        
    0.0.0.0:*                  
LISTEN      461/ccsd</span></b></p>

<p class="MsoNormal"><span style="color:rgb(31,73,125)">tcp       
0      0
<a href="http://0.0.0.0:50008">0.0.0.0:50008</a>              
0.0.0.0:*                  
LISTEN      461/ccsd</span></p>

<br><br>Regards,<br>Ashish<br>