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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I using a bonded interface for drbd and corosync. Each interface is connected to a different network switch, therefore I’ll use mode 1 (active-backup). Sometimes a switch is blocking traffic but is still connected on
the link layer.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When using miimon to check for active connection a blocked switch is not detected. Therefore I’m using<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ARP monitoring and I few IP targets beyond the directly connected switches.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">My question is:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">What is a good value for arp_interval? I’m using 500ms. Are there some best practice values?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="border:none;padding:0cm"><span lang="EN-US">This is a snipped of my config<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">….<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"># For the bonding failover, arp monitoring is used.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"># Do not use the directly connected switch IP addresses<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"># to the network interface but devices beyond the
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"># directly connected switches.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"># use IP address on the same subnet as the bonding interface!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"># ON MER1 USE : vmhost1, san1a, san2a, san3a<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">#BONDING_OPTS="mode=1 arp_interval=500 arp_validate=all arp_ip_target=172.16.111.10,172.16.111.20,172.16.111.23,172.16.111.29"
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"># ON MER2 USE: vmhost1, san1b, san2b, san3b<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">BONDING_OPTS="mode=1 arp_interval=500 arp_validate=all arp_ip_target=172.16.111.10,172.16.111.21,172.16.111.24,172.16.111.30"
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">TYPE=Bonding<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">----------------------------------------------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Maurits van de Lande<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal">Van de Lande BV<o:p></o:p></p>
<p class="MsoNormal">Raamsdonksveer<o:p></o:p></p>
<p class="MsoNormal">The Netherlands<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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