is there anyway this scenario will be applicable for MX84 models (or any other MX model )?
MX1 , WAN1 = ISP A
MX1 , WAN2 = ISP B
MX2 , WAN1 = ISP C
MX2 , WAN2 = ISP D
how will the WAN failover work in case WAN1 in the Active MX (MX1) fails?
is there anyway the (standby) MX WAN 1 will go active if the MX1 is still reachable?
plz share as much details as possible.
In a nutshell:
Please note if a Virtual IP Address (VIP) is to be used then each uplink of the two MXs must share the same broadcast domain on the WAN side.
anyway we can load balance between the 2 MXs in case of WAN1 in MX1 failed?
since WAN links are configured as load balancing...
my point is to utalize the WAN connections in MX2 in case any of the WAN links failed in MX1 (in case of load balancing)
Just to chime in here with something that caught us unawares, the WAN failover is not instant. There is a timeout and algorithm that runs that determines based on DNS responses if a WAN port is up and functional. This can take from 5 to 10 minutes.
A physical failure i believe is instant, but its been a while since i tested that.
What you might be able to leverage is a DIA style connection from your WAN Providers, where they will present perhaps a HSRP backed gateway to your MX's.
Nice input @JimmyPhelan
Here is the document explaining the connection monitoring mechanisms.