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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.
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.
Defaults Disabled (The interface is in Layer 3 mode.)
Command
Modes
INTERFACE
Command
History
This guide is platform-specific. For command information about other platforms,
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.5.1.0 Added support for 4-port 40G line cards on ExaScale.
8.4.1.0 Added support for port-channel interfaces (the port-
channel number option).
8.3.7.0 Introduced on the S4810.
8.1.1.0 Introduced on the E-Series ExaScale.
7.7.1.0 Added the backup interface option.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.2.1.0 Introduced on the E-Series.
Usage
Information
If an IP address or VRRP group is assigned to the interface, you cannot use the
switchport command on the interface. To use the switchport command on an
interface, only the no ip address and no shutdown statements must be
listed in the
show config output.
886
Interfaces