Aruba Switch Stack

A switch stack is a set of switches that are interconnected through stacking ports. The switches in a stack elect a primary switch called Commander and a backup switch as Standby. The remaining switches become Members of the stack. The following table lists the switches support stacking:

Table 1: Switch Stacking Support

Switch Platform

Maximum Number of Stack Members

Minimum Supported Version

Aruba 2920 Switch Series

4

WB.16.04.0008

Aruba 2930M Switch Series

10

WC.16.06.0006

Aruba 5400R Switch Series

2

KB.16.06.0008

Aruba 2930F Switch Series

8

WC.16.07.0002

Aruba 3810 Switch Series

10

KB.16.07.0002

For more information on topology and configuration of switch stacks, see the HPE ArubaOS-Switch Management and Configuration Guide for the respective switch series.

Provisioning Switch Stacks in Aruba Central

The switch elected as the commander establishes a WebSocket connection to Aruba Central. The following criteria apply to provisioning and management of switch stacks in Aruba Central:

Switch stacks can be added only to a template group and cannot be moved to a UI group.

If the standalone switches in a group join to form a switch stack, the switch is moved to the Unprovisioned state.

If a switch stack is moved from a pre-provisioned group to an existing group in the UI, it will be moved to Unprovisioned state.

After forming a switch stack, you can remove a member and erase its stacking configuration. However, the member can join Aruba Central as a standalone switch only after it is deleted from the switch stack.

Assigning Labels and Sites

Aruba Central supports organizing your devices into sites for ease of monitoring. Sites refer to physical locations in which the devices are installed. Administrators can assign switch stacks to a single site for ease of managing installations and monitoring the overall site health. For more information on assigning devices to sites, see Managing Sites.

Similarly, switch stacks can also be tagged using labels. Labels allow you to identify or tag devices installed in a specific site for ease of monitoring. For more information on assigning labels, see Managing Labels.

If any one member of the switch stack is assigned to a site, Aruba Central automatically assigns all other members in a switch stack to the same site. Similarly, if a label is assigned to an individual member in a stack, the same label is applied to all other members of the stack.

 

Because all members of a switch stack must be assigned to the same site and label, Aruba Central automatically corrects the site and label assignment for switch stacks that were earlier assigned to different labels or sites. If you have such switch stacks in your account, you will notice that all stack members are migrated to the same site or label to which the commander was assigned. Aruba recommends that you review the sites and labels assigned by Aruba Central to verify that the switch stacks in your account are assigned to sites and labels that you intended to use, and if required, assign all members of stack to a common site or label of your choice.

Configuring Switch Stacks

The switch stacks are provisioned under template groups in Aruba Central. The template groups allow you to configure and modify the settings of a switch stack using configuration templates.

When uploading a configuring template, ensure that the variables are uploaded for all the members of the stack. The template is applied with the variables of the member that is elected as the commander.

To create a configuration template for switch stack, complete the following steps:

1. From the app selector, click Wired Management.

2. From the group selector, select template group to which the switch stack is assigned. The menu options for configuring devices in the template groups are displayed.

3. Click Templates. The Templates page opens.

4. Click + to create a template for the Aruba switch stack.

5. Specify a name for the template.

6. Select Aruba Switch from the Device drop-down list.

7. Select the Aruba Switch model in the Model drop-down list.

8. Select the Aruba Switch software version in the Version drop-down list.

9. Enter the template text in the Template box.

10. Click Save.

 

Aruba Central does not support the use of part number (J-number) in place of Switch model number in configuration templates for the Aruba switch stack.

The following pre-defined variables are refreshed and re-imported from a switch stack when a new stack member is added or removed, or when a failover occurs.

_sys_template_header

_sys_module_command

_sys_stack_command

_sys_oobm_command

_sys_vlanVirtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN._1_untag_command

_sys_vlanVirtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN._1_tag_command

Monitoring Switch Stacks

See Monitoring Switches and Switch Stacks.

Viewing Switch Stacks in Site Topology

See Topology.

 

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