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Cisco Nexus 5500 Series NX-OS Layer 2 Interfaces Command Reference
OL-27880-02
Chapter S Commands
switchport backup interface
switchport backup interface
To configure Flex Links, which are two interfaces that provide backup to each other, on a Layer 2
interface, use the
switchport backup interface
command. To remove the Flex Links configuration, use
the
no
form of this command.
switchport backup interface
{
ethernet
slot
/[
QSFP-module
/]
port
|
port-channel
channel-no
}
[
multicast fast-convergence
|
preemption
{
delay
delay-time
|
mode
[
bandwidth
|
forced
|
off
]}]
no switchport backup interface
{
ethernet
slot
/[
QSFP-module
/]
port
|
port-channel
channel-no
}
[
multicast fast-convergence
|
preemption
{
delay
delay-time
|
mode
[
bandwidth
|
forced
|
off
]}]
Syntax Description
Command Default
None
Command Modes
Interface configuration mode
Command History
ethernet
slot
/[
QSFP-module
/]
port
Specifies the backup Ethernet interface. The
slot
number is from
1 to 255. The
QSFP-module
number is from 1 to 4. The
port
number is from 1 to 128.
Note
The
QSFP-module
number applies only to the QSFP+
Generic Expansion Module (GEM).
port-channel
channel-no
Specifies the port channel interface. The interface number is
from 1 to 4096.
multicast
(Optional) Specifies to configure the multicast parameters.
fast-convergence
(Optional) Configures fast convergence on the backup interface.
preemption
(Optional) Specifies to configure a preemption scheme for a
backup interface pair.
delay
delay-time
(Optional) Specifies a preemption delay. The range is from 1 to
300 seconds.
mode
(Optional) Specifies the preemption mode.
bandwidth
(Optional) Specifies that the interface with the higher available
bandwidth always preempts the backup.
forced
(Optional) Specifies the interface that always preempts the
backup.
off
(Optional) Specifies no preemption occurs from backup to
active.
Release
Modification
6.0(2)N1(1)
Support for the QSFP+ GEM was added.
5.2(1)N1(1)
This command was introduced.
