MX warm spare without LAN virtual IP ?

[Mr-cook]

Hi,

I'm confused about configuring my meraki MX cluster :

In this documenation :

 https://documentation.meraki.com/MX-Z/Other_Topics/Warm_Spare

I found : 

"LAN IP addresses are configured based on the Appliance IPs in any configured VLANs. No virtual IPs are required on the LAN."

How can I configure HA without LAN virtual IP ? What will be the gateway for my switch ?

Can anyone help please ?

[ww]

only 1 mx is active for all your vlans. you can't config the different vlans on the 2nd mx when they are in warm spare. 

[PhilipDAth · Accepted solution]

It isn't written very well.  The MX's use VRRP, which in essence is a virtual IP.  The IP address is always serviced by the primary MX.  The spare takes over the VRRP IP address if the primary fails.

[Mr-cook]

Thank you PhilipDAth, is it the same for WAN interfaces ?

[PhilipDAth]

The WAN interfaces each need their own IP address, and if there is a common subnet, you can also enable a Virtual IP.  Using a virtual IP on the WAN interfaces is an optional configuration.

https://documentation.meraki.com/MX-Z/Other_Topics/Warm_Spare#Virtual_IP

[Mr-cook]

that's very clear, thanks a lot