Swap out MX 250 Warm spare vs cold swap

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Swap out MX 250 Warm spare vs cold swap

I need to swap out our 250 MX because of an issue with the current one crashing. 


Reading the documentation I'm inclined to assume that configuring a warm spare might be easier and have less downtime than doing a cold swap. 


Can anyone with experience recommend what the best way is with the least amount of downtime. 

Meraki Employee

Hi @hmc25000 this also came up in another recent thread below.  Check here https://documentation.meraki.com/MX/Other_Topics/MX_Cold_Swap_Replacing_an_Existing_MX_with_a_Differ...


In particular look over the section "Adding a Second MX to Form a Warm Spare Configuration" which seems most relevant and is going to minimize your actual downtime if you've got a tight outage window.


Hope that helps.




I'm a little confused with method 1 from the document. If I understand it correctly the Method 1 can be done 

"Adding the Replacement MX to the Same Network" or "Adding a Second MX to Form a Warm Spare Configuration".


I understand for both you have to remove the old MX prior to adding the new one. How can you add a warm spare if you have removed the old MX? Can I assume there will be no downtime when I add the new as a warm spare and than remove the old MX? I just want o make sure I understand it correctly. 


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