stacking switch lose internet

[Joe_Ang]

This is probably a super basic question, but I'm at a loss why this is happening.

I have a pfsense firewall with LAN hooked up to slot 1 on my x440 g2. I want to enable redundancy so I purchased a second x440 g2, but when I plug the switch into slot 49 and 50 (ethernet connected 49-49, 50-50), I suddenly drop internet. I feel like it's trying to grab internet from the new switch rather than my firewall. Both switches are back to factory settings.

Any help would be greatly appreciated. Thank you.

[Eric_Burke]

Joe, be sure to start by upgrading all switches to the same firmware level before connecting. I would also suggest you start with factory defaults on each. Once in this state, connect out of the top switch in to the second. With a console connection to the top unit, type "enable stacking" after they've fully come online.