I would try enabling nonstop forwarding on the stack, and then test again. Nonstop forwarding allows the forwarding plane of stack units to continue to forward packets while the control and management planes restart as a result of a power failure, hardware failure, or software fault on the stack management unit. console(config)#nsf
Hello! I recently set up a network that I am having trouble with and need someone to scan through my switch configs and tell me if they see anything that I have done wrong. The network consists of an M1000 blade - fully populated, 2 Equalogic's, 2 Powerconnect 7048's, and 2 Powerconnect 8024-K's (in the blade enclosure). I have everything configured for redundancy. Each blade server has 4 NIC's, two are for iSCSI traffic and the other 2 are for VM network traffic. The 7048's are stacked. I have gotten everything configured so that I can unplug any of the four NIC's (one at a time) on a blade, and the server will remain connected to storage and the VM network. I also can pull any of the 2 (one at a time) 8024K switches, and the servers will remain connected to the storage and VM network. However, when I unplug one of the 2 7048s, either one, I loose storage and VM network access, these whole network goes down. There is a lag configured for the uplink from the 7048's to a Meraki switch, so I should be able to still pass traffic but the network is going down. Attached are the switch configs and a Visio diagram, I'm hoping someone can pick out the problem right away. My goal is full redundancy, so when I lose a 7048 the network stays up. Thanks in advance!     
Powerconnect 7048 Redundancy Problems