Reference Guide

Usage
Information
Splitting a 40G port into 4x10G port is supported on standalone and stacked units.
Split ports cannot be used as stack-link to stack an S4820T system.
The quad port must be in a default configuration before it can be split into 4x10G
ports. The 40G port is lost in the config when the port is split, so be sure that the
port is also removed from other L2/L3 feature configurations.
The system must be reloaded after issuing the CLI for the change to take effect.
This command cannot be used if LR4 optics are inserted on the 40G interface.
Example (stack
unit – Warning
message when
13 ports are
configured in
any port range)
Dell(conf)#stack-unit 0 po 48 po q
Maximum number of ports that can be made Quad mode in the
range <0-63> is configured. Ports 52,56,60, will be disabled
on reload.
Do you wish to continue? [confirm yes/no]:yes
Please save and reset unit 0 for the changes to take effect.
Dell(conf)#
switchport
Place an interface in Layer 2 mode.
S4820T
Syntax
switchport [backup interface {gigabit slot/port | tengigabit
slot/port | fortyGigE slot/port | port-channel number}]
To remove an interface from Layer 2 mode and place it in Layer 3 mode, enter the
no switchport command. If a switchport backup interface is configured, first
remove the backup configuration. To remove a switchport backup interface, enter
the no switchport backup interface {gigabit slot/port |
tengigabit slot/port | fortyGigE slot/port | port-channel
number} command.
Parameters
backup
interface
Use this option to configure a redundant Layer 2 link without
using Spanning Tree. The keywords backup interface
configures a backup port so that if the primary port fails, the
backup port changes to the up state. If the primary later
comes up, it becomes the backup.
gigabit Enter the keyword gigabit if the backup port is a 1G port.
tengigabit Enter the keyword tengigabit if the backup port is a 10G
port.
fortyGigE Enter the keyword fortyGigE if the backup port is a 40G
port.
port-channel Enter the keywords port-channel if the backup port is a
static or dynamic port channel.
slot/port Specify the line card and port number of the backup port.
Interfaces
797