SD WAN WarmSpare Setup Question

[Kyojuro]

Hello, 

I'm trying to setup a HA failover for our SDWAN following this guide. 

https://www.willette.works/mx-warm-spare/

My question for doing this is, when the failover SD WAN is connected locally to the primary SDWAN for the first time, will the SD WAN go offline and bring down the network in anyway while it's syncing with the secondary? 

[PhilipDAth]

As long as the head end is set up to route correctly, no.

[PhilipDAth · Accepted solution]

Sorry, I thought that as the active/active guide.

No there will be no disruption when enabling warm spare.

[Volcomer]

That's just not true. When enabling HA on MX85's the primary also reboots witch causes disruption.