Reference Guide

616 | Interfaces
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Defaults
Disabled
Command Modes
CONFIGURATION
Command History
Usage Information
Splitting a 40G port into 4x10G port is supported only on a standalone unit.
— Split ports cannot be used as stack-link to stack an Z9000.
— Split ports Z9000 unit cannot be a part of any stacked system.
— The unit number with the split ports must be the default (stack-unit 0)
— This can be verified using show system brief command. If the unit ID is different than 0, then
it must be renumbered to 0 before ports are split by using the stackunit id renumber 0
command in EXEC mode.
— Stacking is not supported on FTOS Release 8.3.11.4.
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 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.
switchport
c e s z
Place the interface in Layer 2 mode.
Syntax
switchport [backup interface {gigabit | tengigabit | fortygigabit} slot/port]
To remove the interface from Layer 2 mode and place it in Layer 3 mode, enter no switchport. If a
switchport backup relationship exists, remove that relationship first.
To remove a switchport backup relationship created on this port, enter no switchport backup
interface
{gigabit | tengigabit | fortygigabit} slot/port].
Parameters
Defaults
Disabled (The interface is in Layer 3 mode.)
Command Modes
INTERFACE
Version 8.3.11.1 Introduced on Z9000
Version 8.3.11.1 Introduced on S4810
backup
interface
Use this option to configure a redundant Layer 2 link without using Spanning Tree. This
keyword 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 this keyword if the backup port is a 1G port.
tengigabit
Enter this keyword if the backup port is a 10G port.
fortygigabit
Enter this keyword if the backup port is a 40G port.
slot/port
Specify the line card and port number of the backup port.