Physical Fibre Channel Interfaces; Virtual Fibre Channel Interfaces; Interface Modes - Cisco Nexus 5000 Series Configuration Manual
Nx-os san switching configuration guide
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Also See for Nexus 5000 Series:
- Cli configuration manual (660 pages) ,
- Configuration manual (334 pages) ,
- Command reference manual (196 pages)
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Information About Fibre Channel Interfaces
The following commands will enable the default QoS configuration which must be configured for native FC
or FCoE or FC and FCoE:
switch(config)# system qos
switch(config-sys-qos)# service-policy type queuing input fcoe-default-in-policy
switch(config-sys-qos)# service-policy type queuing output fcoe-default-out-policy
switch(config-sys-qos)# service-policy type qos input fcoe-default-in-policy
switch(config-sys-qos)# service-policy type network-qos fcoe-default-nq-policy
Physical Fibre Channel Interfaces
Cisco Nexus 5000 Series switches support up to sixteen physical Fibre Channel (FC) uplinks through the use
of two, optional explansion modules. The first module contains eight FC interfaces. The second module
includes four Fibre Channel ports and four Ethernet ports.
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: E, F, NP, TE, TF,
TNP, SD, and Auto.
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 (vFC) interface.
Like any interface in Cisco NX-OS, vFC interfaces are manipulable objects with properties such as configuration
and state. Native Fibre Channel and vFC interfaces are configured using the same CLI commands.
The following capabilities are not supported for virtual Fibre Channel interfaces:
• SAN port channels.
• The SPAN destination cannot be a vFC 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.
Interface Modes
Each physical Fibre Channel interface in a switch may operate in one of several port modes: E mode, TE
mode, F mode, TF mode, TNP mode, and SD mode. A physical Fibre Channel interface can be configured
as 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.
Virtual Fibre Channel interfaces can only be configured in F mode.
Interfaces are automatically assigned VSAN 1 by default.
Each interface has an associated administrative configuration and an operational status:
• The administrative configuration does not change unless you modify it. This configuration has various
attributes that you can configure in administrative mode.
Cisco Nexus 5000 Series NX-OS SAN Switching Configuration Guide
8
Configuring Fibre Channel Interfaces
OL-xxxxx-xx
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