I´m running a Dell Powerconnect 6224 with firmware 18.104.22.168 for a customer.
After upgrade to firmware 22.214.171.124 from the version 126.96.36.199, and starting to use ISCSI with link aggregation groups, the switch began to reboot every 2-3 days.
Now, i have disabled LAG and this issue also happen.
It could be a firmware problem? Really, with firmware 188.8.131.52 it was solid as rock but without a advanced usage such as vlan, link aggregation, IP routing...