Best practice, MXs L3 warm spare, MS not stacked L2. Please provide any input.

[M_C]

[alemabrahao]

Take a look at the documentation.

https://documentation.meraki.com/Platform_Management/Dashboard_Administration/Design_and_Configure/A...

[M_C]

Thank you for your reply. The switches are not stacked and are not performing L3.

[alemabrahao]

Well, since we don't have complete visibility into your needs, the best thing to do is talk to your Cisco Meraki partner so they can help you define the best design for you.

[PhilipDAth]

I would not dual-connect an MX to a switch fabric.  Use a single connection.

What happens is you eventually run into a spanning tree issue and suffer an outage that the extra redundancy was meant to avoid.

In other words, the extra complexity causes more outages than it prevents.

[M_C]

Thank you for your feedback. MXs are configured as a warm spare performing L3 and connected to each switch only by one connection. RSTP enabled would stop a broadcast storm by shutting down a port to reduce a broadcast storm.

[PhilipDAth]

I would not connect the MXs to each other either.  Just a single connection to the layer 2 domain.

RSTP is not sufficient to stop ports being incorrectly blocked.  It would help if the MXs supported spanning tree or port channels, but alas they do not.

[M_C]

The MXs are not connected directly to each other and RSTP is enabled by default on the switches to prevent broadcast storms. Also with the size of our network, do you think it would be an issue.