Disabling Spanning tree breaks the network?

Infrastructure & Networking Switches and Gateways Ethernet Switches
#1

Hi Current Setup is that way :

2 x SX1012

Port 1-4 are configured as hybrid and connected to nutanix servers. Port 5 is a breakout cable still connected to nutanix servers and set to hybrid. (All are 10GB)

Port 9 is set to hybrid and connected to a backup server (10GB)

Port 10 is connected to a juniper switch over 40GB

Port 11-12 is connected to the other mellanox switch using LACP (2 56GB set to hybrid)

As per Nutanix recommendations, it is recommended to disable spanning tree. As soon as I do that the servers lose connections to themselves and crashes. What would be the cause?

I have attached the pictures from the Spanning tree config of both switches. Notice how one is different even though the settings are the same.

switch2.JPG
switch2.JPG841×663 68.7 KB

switch1.JPG
switch1.JPG814×699 71.9 KB

#2

Hi David,

If you didn’t configure MLAG on the 2 Mellanox switches - you don’t need to disable STP.

Nutanix recommendation is related when MLAG is configured.

#3

Understood! Is there any benefit of deploying mlag compared to lacp For the switch interconnection?