Npv Gateway; Npv Port Traffic Mapping; Npv Disruptive Load-Balancing - Lenovo Flex System Fabric CN4093 Application Manual

NPV Gateway

NPV Port Traffic Mapping

NPV Disruptive Load-Balancing

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CN4093 Application Guide for N/OS 8.4
As a Node Port Virtualized (NPV) gateway, the CN4093 can act as a Fibre Channel
collector, connecting numerous Fibre Channel end‐point devices (known as nodes)
for uplink to a Fibre Channel full fabric switch, performing stateless FC/FCoE
encapsulation and decapsulation. For more details, see "NPV Gateway" on
page 331.
Within each VLAN used with Fibre Channel, the physical ports may be used in the
following roles:
NPV External Interfaces

All NPV gateways on the CN4093 must connect to a full fabric switch. The NPV
external interface map specifies which Fibre Channel port or ports (Omni Ports
set to Fibre Channel mode) are used for this purpose within each Fibre Channel
VLAN. At least one Fibre Channel port is required, though two are typically
used in order to provide redundancy. The following VLAN configuration
command is used to define or remove the uplink:
CN 4093(config-vlan)# [no] npv traffic-map external-interface <ports>
 Fibre Channel over Ethernet node
Traffic from Ethernet ports which are properly configured to use CEE and FCoE
(see "FCoE and CEE" on page
configuration.
 Ethernet
Traffic on regular (non‐FCoE) Ethernet ports will be blocked on Fibre Channel
VLANs.
Every server connected to the NPV gateway logs into an upstream FC switch
through a NP uplink. If multiple NP uplinks are available in a NPV VLAN, the
logins are evenly distributed over the available uplinks.
The number of logins per uplink can go out of balance if a failed NP uplink is
restored or a new uplink is brought online. The NPV gateway does not
automatically move Enodes from the existing to new uplinks in such situations. To
force the logins to be evenly distributed among all available uplinks in a NPV
VLAN, the load‐balancing CLI is available under the VLAN config.
Disruptive load‐balancing can be configured through two available options:
 manual ‐ triggers a disruptive load‐balance among the logged‐in nodes in the
current NPV VLAN. The CLI for this option is:
CN 4093(config-vlan)# npv disruptive-load-balance
Note: This option addresses only the current imbalance. The CLI must be run
again if any event causes uneven distribution in the future.
299) is permitted with no additional