Concept Guide

clear Reset functions
copy Copy from one file to another
delete Delete a file
dir List files on a filesystem
disable Turn off privileged commands
enable Turn on privileged commands
exit Exit from the EXEC
format Format a filesystem
fsck Filesystem check utility
pwd Display current working directory
rename Rename a file
reset Reset selected card
show Show running system information
ssh-peer-stack-unit Open a SSH connection to the peer stack-unit
start Start shell
telnet-peer-stack-unit Open a telnet connection to the peer stack-unit
terminal Set terminal line parameters
upload Upload file
Dell(standby)#
-----------------CONSOLE ACCESS ON A MEMBER----------------------------
Dell(stack-member-1)#?
reset-self Reset this unit alone
show Show running system information
You can connect two units with two or more stacking cables in case of a stacking port or cable failure. Removal of only one of
the cables does not trigger a reset.
Mixed-mode Stacking
Mixed-mode stacking enables you to stack one or more S4048-ON switches with the S4048T-ON switches and vice versa.
If mixed-mode stacking is not enabled, a S4048-ON switch cannot join a S4048T-ON stack or a stack that contains a mix of
both the S4048-ON as well as the S4048T-ON switches. However, the S4048-ON switches can join a S4048-ON stack without
having to enable mixed-mode stacking.
Similarly, if mixed-mode stacking is not enabled, a S4048T-ON switch cannot join a S4048-ON stack or a stack that contains
a mix of both the S4048T-ON as well as the S4048-ON switches. However, the S4048T-ON switches can join a S4048T-ON
stack without having to enable mixed-mode stacking.
NOTE:
Even though the S4048-ON and S4048T-ON belong to the same family of switches, the system detects a card-type
mismatch during stack insertion if mixed-mode stacking is not enabled.
When a S4048T-ON switch, on which mixed-mode stacking is enabled, joins a S4048-ON stack, the S4048T-ON switch is
rebooted. The hardware tables of the S4048T-ON are re-initialized in order to make the table sizes of the S4048T-ON identical
to the S4048-ON switches. In this scenario, the S4048-ON configurations are pushed to the newly joined S4048T-ON and
the switch successfully joins the stack. However, if mixed-mode stacking is disabled on the S4048T-ON, the system detects a
card-type mismatch and moves the S4048T-ON into a card problem state.
When a S4048T-ON switch, on which mixed-mode stacking is enabled, joins a stack that contains both S4048-ON as well as
S4048T-ON switches, the new S4048T-ON switch is rebooted. The hardware tables of the S4048T-ON switch are re-initialized
in order to make the table sizes identical to the S4048-ON switches. In this scenario, the S4048-ON configurations are pushed
to the newly joined S4048T-ON and the switch successfully joins the stack. However, if mixed-mode stacking is disabled on the
S4048T-ON switch, the system detects a card-type mismatch and the S4048T-ON switch remains in a card problem state.
When a S4048-ON switch, on which mixed-mode stacking is enabled, joins a stack with S4048T-ON as the master, the entire
stack is rebooted. The hardware tables of the existing S4048T-ON units are re-initialized in order to make their table sizes
identical to the S4048-ON switches. In this scenario, as mixed-mode stacking is enabled, the system will not detect a card-type
mismatch. The S4048-ON switch successfully joins the S4048T-ON stack. However, if mixed-mode stacking is not enabled on
the S4048-ON switch, the system detects a card-type mismatch and the S4048-ON switch remains in a card problem state.
When a S4048-ON switch, on which mixed-mode stacking is enabled, joins a stack that contains both S4048-ON as well as
S4048T-ON switches, the new S4048-ON switch is accepted as a member unit. In this scenario, the newly joined S4048-ON
switch or the stack will not reboot as the hardware table sizes of both these platforms are already in sync.
NOTE:
Mixed-mode stacking enables stacking to form only between the S4048-ON and S4048T-ON switches. Any other
variant of the S-series switches are not allowed to join the stack that contains the S4048-ON and S4048T-ON switches.
904 Stacking