Downlink-To-Uplink Interface Mappings; Disruptive Load Balancing; Npv Configuration Task List; Configuring Uplink Interfaces And Downlink Interfaces - HP 6125XLG Configuration Manual

Downlink-to-uplink interface mappings

NPV switches automatically map downlink interfaces to uplink interfaces. Before a downlink interface is
brought up, the NPV switch maps it to the uplink interface with the minimum load among all operational
uplink interfaces. The load here indicates the number of downlink interfaces mapped to the uplink
interface.
When automatic mapping cannot meet requirements (for example, when a downlink interface must be
connected to a fabric through a specified uplink interface), you can manually map the downlink interface
to a specified uplink interface or a set of uplink interfaces. After you configure the mapping, the downlink
interface can be mapped to only the configured uplink interfaces. In other words, if none of the
configured uplink interfaces is operational, the downlink interface cannot be operational.
A configured mapping selects the uplink interface with the minimum load from configured uplink
interfaces and then maps the downlink interface to it.
After a mapping is established, all traffic from the downlink interface is forwarded through the uplink
interface.

Disruptive load balancing

When a new uplink interface becomes operational, the NPV switch does not perform a remapping for
load balancing. In the event of remapping, the NPV switch reinitializes the downlink interface so that the
nodes connected to the downlink interface register with the core switch again. This causes traffic
interruption to the nodes.
You can trigger a remapping by using commands for better load balancing. In this case, the NPV switch
reinitializes all downlink interfaces.

NPV configuration task list

Tasks at a glance
(Required.) Configuring the switch to operate in NPV mode
(Required.)
interfaces
(Optional.)
mappings
(Optional.)
Configuring uplink interfaces and downlink
interfaces
After configuring the switch to operate in NPV mode, configure the uplink interfaces and downlink
interfaces.
Configuring uplink interfaces and downlink
Configuring downlink-to-uplink interface
Initiating a disruptive load-balancing process
Remarks
See "Configuration
an FCoE mode."
N/A
N/A
N/A
87
procedure" in "Configuring