For instructions about upgrading Switch Engine software, see Software Upgrade and Boot Options in Switch Engine v33.1.1 User Guide .
A Switch Engine core image (.xos file) must be downloaded and installed on the alternate (non-active) partition. If you try to download to an active partition, the system displays the following error message: Error: Image can only be installed to the non-active partition.. A Switch Engine modular software package (.xmod file) can still be downloaded and installed on either the active or alternate partition.
Note
New ExtremeSwitching 5420 and 5520 PoE switches use a new version of the PoE microcontroller that prevents the switch from downgrading to older EXOS versions and prevents operating system switchover to unsupported VOSS versions.The following error message is displayed during the downgrades to older versions:
Error: Failed to download image - summit_arm-31.6.1.3.xos does not include compatible PoE microcontroller support. See the User Guide for information on installing a newer software release. See the Hardware/Software Compatibility and Recommendation Matrices to verify the supported releases.
The ExtremeSwitching 5420 and 5520 PoE switches that use a new version of the PoE microcontroller can be identified for by checking the PoE firmware revision (5.0 or later) by entering the show inline-power stats command (line four):
# show inline-power stats Inline-Power Slot Statistics Firmware status : Operational Firmware revision : 5.0.0b4 Total ports powered : 3 Total ports awaiting power : 20 Total ports faulted : 0 Total ports disabled : 1