About logical switches

A logical switch is added into HPE OneView as a managed or monitored logical switch. The logical switch can consist of a maximum of two physical top-of-rack switches (external to the c7000 enclosure) configured in a single stacking domain.

There is a connectivity limitation of one logical interconnect to one logical switch. Interconnects within a logical interconnect cannot be connected to more than one logical switch.

The Logical switches master pane lists all the switches that are available.

A logical switch is based on a logical switch group configuration. If the logical switch transitions to an Inconsistent with group state (due to the changes in either the logical switch or the logical switch group), update the logical switch configuration based on the logical switch group to return to a consistent state.

The Refresh action is allowed for the logical switch.

About assigning Cisco Nexus switches to a logical switch

You can create a logical switch with a maximum of two Cisco Nexus switches. When there are two Cisco Nexus switches in a logical switch, they must be in a virtual PortChannel (vPC) environment. vPC must be configured on both the switches, and they must belong to the same vPC domain.

A virtual PortChannel (vPC) allows links that are physically connected to two different switches to appear as a single port channel to a third switch. vPC domain ID, vPC primary MAC address, vPC member ID, vPC role in a vPC domain can be configured for Cisco Nexus switches.

Stacking links can be set from the originating peer or the destination peer when two switches are participating in the vPC environment. Also, stacking links can be set to the destination end of the peer link between two vPC switches.

About assigning Cisco Nexus ACI switches to a logical switch

HPE OneView allows fabric manager to discover and monitor Cisco Nexus 9K ACI mode switches. The logical switch must be added as Monitored enabling HPE OneView to monitor the logical switch for operation status and statistics collection.

In HPE OneView:

  • When you create the fabric manager for Cisco Nexus 9K ACI mode switches, the logical switch and the logical switch group are automatically created with a one-to-one mapping between the fabric manager and the logical switch. All the discovered Cisco Nexus 9K ACI mode switches are grouped under the mapped logical switch.

  • When there is an update to the fabric manager, the logical switch and the logical switch group are also updated.

  • When a fabric manager is deleted, the logical switch and the associated Cisco Nexus 9K ACI mode switches are also deleted. The logical switch group is deleted only after the last fabric manager is deleted.

  • Interconnect modules might be connected to one or more Cisco Nexus 9K ACI mode switches.

HPE OneView monitors the events on the Cisco APIC (Application Policy Infrastructure Controller) for changes on the monitored switches. HPE OneView reads the switch and the port attributes from the Cisco APIC.

Assigning rack connectivity modules to a logical switch

You can create a logical switch that pairs two rack connectivity modules. You can assign rack servers and server profiles to the two rack connectivity modules that are associated with the logical switch.

When rack servers are assigned to the rack connectivity modules that are associated with the logical switch, the following configurations are checked:

  • The rack servers are consistently connected with the two rack connectivity modules.

  • The rack server is connected to the same port on both rack connectivity modules.

If there are issues during the initial server profile assignment, validation errors are displayed during server profile creation.

If the cabling configuration is changed after the server profile assignment, alerts are displayed on the Logical Switches, Server Profiles, and Switches screens as applicable.

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