Physical Fibre Channel Interfaces; Virtual Fibre Channel Interfaces; Interface Modes - Cisco AJ732A - MDS 9134 Fabric Switch Configuration Manual
Cisco nexus 5000 series switch cli software configuration guide, nx-os 4.0(1a)n1 (ol-16597-01, january 2009)
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Information About Fibre Channel Interfaces
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Physical Fibre Channel Interfaces
Cisco Nexus 5000 Series switches provide up to eight physical Fibre Channel uplinks. The Fibre
Channel interfaces are supported on optional expansion modules. The Fibre Channel plus Ethernet
expansion module contains four Fibre Channel interfaces.
Each Fibre Channel port can be used as a downlink (connected to a server) or as an uplink (connected to
the data center SAN network). The Fibre Channel interfaces support the following modes: F, NP, E, TE,
and SD.
Virtual Fibre Channel Interfaces
Fibre Channel over Ethernet (FCoE) encapsulation allows a physical Ethernet cable to simultaneously
carry Fibre Channel and Ethernet traffic. In Cisco Nexus 5000 Series switches, an FCoE-capable
physical Ethernet interface can carry traffic for one virtual Fibre Channel interface.
Native Fibre Channel and virtual Fibre Channel interfaces are configured using the same CLI commands.
Virtual Fibre Channel interfaces support only F mode, and offer a subset of the features that are
supported on native Fibre Channel interfaces.
The following capabilities are not supported for virtual Fibre Channel interfaces:
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Interface Modes
Each physical Fibre Channel interface in a switch may operate in one of several port modes: E mode, TE
mode, F mode, and SD mode (see
an E port, an F port, or an SD port. Interfaces may also be configured in Auto mode; the port type is
determined during interface initialization.
In NPV mode, Fibre Channel interfaces may operate in NP mode, F mode or SD mode. For additional
information about NPV mode, see
Virtual Fibre Channel interfaces can only be configured in F mode.
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
32-2
SAN port channels.
VSAN trunking. The virtual Fibre Channel is associated with one VSAN.
The SPAN destination cannot be a virtual Fibre Channel interface.
Buffer-to-buffer credits.
Exchange link parameters (ELP), or Fabric Shortest Path First (FSPF) protocol.
Configuration of physical attributes (speed, rate, mode, transmitter information, MTU size).
Port tracking.
Figure
32-1). A physical Fibre Channel interface can be configured as
Chapter 34, "Configuring N Port Virtualization."
Chapter 32
Configuring Fibre Channel Interfaces
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