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I believe it has to do with ARP and how the mikrotik manages
duplicates etc across the network when using VRRP - but I could be
wrong.<br>
<br>
Switching between the 2 though could be due to priorities and/or
preemption mode - would need to see your config or a debug level log
when its happening to know for sure.<br>
<br>
<div class="moz-cite-prefix">On 2/9/20 12:23 pm, Rhys Cuff (Speedweb
Internet) wrote:<br>
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<p class="MsoNormal">Hi Guys<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Has anyone had much experience with using
Vrrp on a Mikrotik?<o:p></o:p></p>
<p class="MsoNormal">It seemed pretty easy to setup but the
manual said the floating IP must be a /32 and to put an IP on
the physical interface with a /24<o:p></o:p></p>
<p class="MsoNormal">This seemed wrong so I just put a /24 on
the Vrrp interface and a completely different subnet on the
physical interface for the routers to communicate.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thinking I was clever all was well till
about 1am two days after I did this, then it completely
failed, switching back and forth from master to backup,
basically having two masters on and off.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is having a /32 on the vrrp really
necessary, if so why?<o:p></o:p></p>
<p class="MsoNormal">Why would it have been all good for two
days?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So my config that lasted two days<o:p></o:p></p>
<p class="MsoNormal">Vrrp 192.168.1.1/24 (floating IP I care
about)<o:p></o:p></p>
<p class="MsoNormal">Physical 10.0.1.1/24 (to communicate with
master/backup routers)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">How the manual says to do it<o:p></o:p></p>
<p class="MsoNormal">Vrrp 192.168.1.1/32<o:p></o:p></p>
<p class="MsoNormal">Physical 192.168.1.2/24<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Doing it the second way will mean a lot
more IP’s/config as I want to have around 20 floating IP’s
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks again for any help.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Rhys<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><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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