By default, the switch supports IPMI version 2.0, but you can enable IPMI v 1.5 sessions if needed. The switch can support both 1.5 and 2.0 sessions simultaneously.
If IPMI 1.5 sessions are enabled, IPMItool users can use the -I lan option.
If IPMI 1.5 sessions are disabled, IPMItool users must use the IPMI version 2.0 -I lanplus option.
IPMI 1.5 sessions can be enabled only if FIPS service is disabled. See Disable FIPS (Oracle ILOM Web).