How to cable MX & MS for HA

SOLVED
MoBrad
Conversationalist

How to cable MX & MS for HA

What's the recommended way to cable and configure 2x MX250 operating in HA NAT, and connecting to 2xMS350-24 which are stacked?

 

My thoughts are that this requires 4 GbE connections.... Would aggregation be required for the 4 ports?

Primary MX

GbE 3 to MS350-1, port 1

GbE 4 to MS350-2, port 2

 

Spare MX

GbE 3 to MS350-2, port 1

GbE 4 to MS350-1, port 2

1 ACCEPTED SOLUTION
PhilipDAth
Kind of a big deal
Kind of a big deal

The way you have suggested is the way I do it.

 

However Meraki's recommendation is a cable from each MX to a switch, and then a cable directly between the MX's.

https://documentation.meraki.com/MX-Z/Other_Topics/Troubleshooting_MX_Warm_Spare_in_NAT_Mode_(NAT_HA...

I don't agree with this approach, because you often get all the traffic being switched through the spare to get to the active unit thanks to spanning tree often choosing to block the link to the active MX.

 

 

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