configure stacking-support stack-ports

configure stacking-support stack-port [stack-ports | all] selection [native {V160} | V320 |V400 {alternative-configuration} | help} | alternate]

Description

Selects the switch ports and speed for stack communications.

Syntax Description

stack-ports

Specifies the stacking port range to be configured. Valid stacking port entries are 1, 2, 1-2, and all.

native

Selects the specified stacking port, which is the native, dedicated port that only supports stacking.

V160

Specifies that the native stacking ports on the option card operate at 160 Gbps.

V320

Specifies that the native stacking ports on the option card operate at 320 Gbps.

V400

Specifies that the native stacking ports on the option card operate at 400 Gbps (ExtremeSwitching X590, X690, and X870 only).

alternative-configuration Select the V400 alternate configuration stacking mode.
help Provides more details regarding the alternate configuration stacking mode
alternate

Selects the alternate (Ethernet) stacking port associated with the specified stacking port. The alternate port numbers are listed in the following table.

Default

Switches with native stack ports default to "Native". This command does not apply to switches without native stack ports.

Native stacking ports on ExtremeSwitching switches with option cards operate as one 40 Gbps port.

ExtremeSwitching X670-G2-48x platforms, front panel ports are used for 160G and 320G stacking. For ExtremeSwitching X460-G2, VIM-2Q ports are used for 160G stacking.

Usage Guidelines

The configuration entered with this command applies to only the local node and does not become active until after the following events:
  • The stacking-support option is enabled (if applicable).
  • The switch restarts.

The V160, V320, and V400 keywords apply only to ExtremeSwitching switches with an installed option card. Each speed configuration requires a specific cabling configuration. For more information, see the ExtremeSwitching and Summit Switches: Hardware Installation Guide for Switches Using ExtremeXOS Version 30.7 .

"V400" is the default mode that sets the stack ports to 106G. "V400 alternative-configuration" is required when using specific fiber cables. This mode sets the stack ports to 100G, enables pre-emphasis, and FEC (clause_91). Cables requiring alternative-configuration include:
  • QSFP28 SR4
  • QSFP28 LR4
  • QSFP28 CWDM4
  • QSFP28 PSM4
  • QxQ AOC cable - 5m
  • QxQ AOC cable - 7m
  • QxQ AOC cable - 10m
  • QxQ AOC cable - 20m
For a complete list of supported cables, see ExtremeSwitching and Summit Switches: Hardware Installation Guide for Switches Using ExtremeXOS Version 30.7 .

The stacking-support option configures the switch to use stacking protocols. This option is automatically enabled on most platforms, but some platforms require you to manually enable the stacking-support option. The following table lists the ExtremeSwitching series switches and option card configurations that support Stacking Port Selection Control, and it lists which platforms require manual Stacking-Support Option Control.

Table 1. ExtremeSwitching Series Switch Support for Alternate Stack Ports
Switch Model Number Switch Option Card Alternate Port for Stack Port Alternate Port for Stack Port Stacking-Support Option Control Stacking Port Selection Control
X440-G2-12t-10GE4

X440-G2-12p-10GE4

None 15 16 Yes Yes
X440-G2-24t-10GE4

X440-G2-24x-10GE4

X440-G2-24t-10GE4-DC

X440-G2-24p-10GE4

None 27 28 Yes Yes
X440-G2-48t-10GE4

X440-G2-48t-10GE4-DC

X440-G2-48p-10GE4

None 49 50 Yes Yes
X450-G2-24t-10GE4

X450-G2-24p-10GE4

X450-G2-48t-10GE4

X450-G2-48p-10GE4

None 27

27

51

51

28

28

52

52

Yes Yes
X460-G2-24t-1G

X460-G2-24p-1G

X460-G2-48t-1G

X460-G2-48p-1G

VIM-2X 33

33

53

53

34

34

54

54

Yes Yes
X460-G2-24p-10G

X460-G2-24t-10G

X460-G2-24x-10G

X460-G2-48p-10G

X460-G2-48t-10G

X460-G2-48x-10G

X460-G2-24p-24hp-10GE4

X460-G2-24t-24ht-10GE4

X460-G2-16mp-32p-10GE4

None 31

31

31

51

51

51

51

51

51

32

32

32

52

52

52

52

52

52

Yes Yes
X620-8t-2x

X620-10x

None 9 10 Yes Yes
X620-16t

X620-16x

X620-16p

None 15 16 Yes Yes
X670-G2-48x-4q None 47 48 Yes Yes
X670-G2-72x None 71 72 Yes Yes

When the alternate stack port is selected for a native stack port and the switch is restarted, the native stack port remains visible in the CLI and can be configured. However, any configuration applied to the replaced stack port is ignored and does not affect switch operation.

An alternate stack port runs the stacking protocol and cannot operate on a link connected to a data port that is not configured as a stack port. Both ends of a stack link must be configured to use the stacking protocol. The stacking link must be directly connected to two the alternate stacking ports of two stacking switches. The direct connection is necessary because stacking protocols cannot pass through an intermediate switch.

After a data port is activated as an alternate stack port, all data port configuration commands still work, but they do not change the operation of the alternate stack port. The LEDs on an Ethernet port used as an alternate stacking port operate according to the behavior of the Ethernet port. The LEDs on the related (disabled) native stacking port remain dark.

Note

Note

Commands that contain the stacking-support keyword operate only on the local switch; they do not apply to all switches in the stack. If an active stack topology has been formed, you can telnet to a slot elsewhere in the stack, log on to that switch, and use commands with the stacking-support keyword on that switch.

Example

The following command configures the switch to use the alternate stack port for Stack Port 1 after the next switch restart:

configure stacking-support stack-ports 1 selection alternate

The following command configures the switch to use both native stacking ports after the next switch restart:

configure stacking-support stack-ports 1-2 selection native

The following command configures stack ports 1 and 2 to operate as four 40 Gbps ports:

configure stacking-support stack-ports 1-2 selection native V160

History

This command was first available in ExtremeXOS 12.5.

The V80 and V160 keywords were added in ExtremeXOS 12.6.

The V320 keyword was added in ExtremeXOS 15.1 Revision 2.

The V400 keyword was added in ExtremeXOS 22.2.

The alternative-configuration and help keywords were added in ExtremeXOS 30.2.

The V80 option was removed in ExtremeXOS 30.2.

Platform Availability

This command is available on the ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, and X870 series switches. The V160 keyword is supported only on switches with the VIM3-40G4X or VIM4-40G4X option card installed.