Lenovo Flex System Fabric CN4093, Application Manual

Page: 363 / 634

© Copyright Lenovo 2017 Chapter 21: Unified Fabric Port
363
Virtual Ports Modes
A single physical switch port is configured with virtual ports (vPorts). Each UFP
channel connects the server vNIC with a switch vPort. Properties that are defined
for a vPort, such as native VLAN and bandwidth, are applied to the traffic that
belongs to the vPort.
Note:
A maximum of eight vPorts can be configured for each physical switch port.
QoS Enhanced Transmission Selection (ETS) mode must be enabled when
configuring more than four vPorts of a physical switch port. For mode details
about ETS mode, check page 366 .
vPort-S-Tag Mapping
A vPort can also be identified with an S ‐ tag (service tag or outer tag). When a vPort
is initialized, the switch communicates the UFP channel ID of the vPort to the
server vNIC. When the server NIC or switch transmit frames, they add this S ‐ tag to
indicate the vPort or vNIC to which the packet is being transmitted. No VLAN
mapping is required. Such packets can be single tagged or double tagged (with
S ‐ tag).
vPort-VLAN Mapping
In local domain data path type, the switch and server identify the vPort and vNIC
by the port and VLAN tag in the incoming and outgoing packets. Because no two
vPorts carry traffic for the same VLAN, the port ‐ and ‐ VLAN combination must be
uniquely mapped to a vPort.
UFP vPort Mode
The UFP mode is configured based on the type of switching domain (single VLAN
or multiple VLANs) where the vPort is connected.
 Use local domain data path types for trunk or access mode.
 Use pass ‐ through domain data path types for tunnel mode. In tunnel mode, a
vPort can belong to only one VLAN.
Use the following command to configure UFP vPort mode:
Notes:
 Default mode is
tunnel
.
 If LACP is down on a UFP port, the FCoE connections go down and are then
reestablished by UFP.
CN 4093(config)# ufp port
<num>
vport
<num>
CN 4093(config_ufp_vport)# network mode {access|trunk|auto|tunnel|fcoe}