[AusNOG] Vrrp

[Joseph Goldman]

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.

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.

On 2/9/20 12:23 pm, Rhys Cuff (Speedweb Internet) wrote:
>
> Hi Guys
>
> Has anyone had much experience with using Vrrp on a Mikrotik?
>
> 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
>
> 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.
>
> 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.
>
> Is having a /32 on the vrrp really necessary, if so why?
>
> Why would it have been all good for two days?
>
> So my config that lasted two days
>
> Vrrp 192.168.1.1/24 (floating IP I care about)
>
> Physical 10.0.1.1/24  (to communicate with master/backup routers)
>
> How the manual says to do it
>
> Vrrp 192.168.1.1/32
>
> Physical 192.168.1.2/24
>
> Doing it the second way will mean a lot more IP’s/config as I want to 
> have around 20 floating IP’s
>
> Thanks again for any help.
>
> Rhys
>
>
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