Users Guide

68 Switch Feature Overview
!System Description "Dell EMC Networking N3048EP-ON, 6.5.1.2, Linux
3.6.5-d3d24324"
!System Software Version 6.5.1.2
!This firmware supports a stack of up to twelve switches.
!MVRP/MMRP capabilities and up to 4093 VLANs may be configured.
When migrating between the two types of images, certain commands in the
startup-config may fail to execute because the relevant feature is not
available. The switch firmware will identify any failed commands. It is
necessary to edit the startup-config if errors are displayed and remove any
failed commands. Do not simply save the running-config when commands in
the startup-config fail, as the startup-config may contain modal commands
that enter into a sub-mode not supported by the firmware. The exit
command to exit the sub-mode may, in fact, exit Global Configuration mode,
causing all subsequent commands to fail, even though those commands may
be valid. When migrating from Adv firmware to AdvLite firmware, Dell
recommends clearing the configuration and saving it to avoid any issues
caused by exceeding the scaling limits of the AdvLite firmware.
In a mixed stack, all stack members contain the active, and optionally backup,
firmware images for both types of units. It is necessary to have both images
present on all units to allow any unit to perform the stack master function. A
mixed stack may only be updated by installing an .itb firmware image using
the copy command from any supported source, e.g. USB or TFTP. A mixed
stack may also be upgraded by configuring an .itb firmware image as part of
DHCP Auto-configuration that occurs as part of the switch boot process. The
USB Auto-configuration upgrade feature should not be used to upgrade a
mixed image stack. Do not attempt to update a mixed stack by installing an
.stk firmware because a version mismatch may occur later after a stack master
failover. In these cases, the recovery procedure is to reinstall the firmware
using an .itb image.
Do not download Adv mixed stack (itb) firmware to a stack containing legacy
N3000 Series switches. It is required that a mixed stack containing legacy
N3000 Series switches only be loaded with the AdvLite (itb) firmware. If
NOTE: Switches must be upgraded to firmware version 6.5.1 or later in order to
recognize and download an .itb image.