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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