Many Extreme Networks switches are shipped with an internal power supply that supplies all of the power needed for most switch operation. The internal power supply is fixed on some models and replaceable on other models. (See Replaceable Internal Power Supplies.)
Other switches, such as the X450-G2 and the X460-G2, require power supplies to be ordered separately.
An optional redundant power supply can be added to most models to protect against a power supply failure and to provide increased support for PoE operation on applicable switches.
V300 Virtual Port Extender high temperature (HT) models use an external power supply for redundancy.
The V400 Virtual Port Extender also uses an external power supply for redundancy.