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Table Of Contents
NPIV Proxy Gateway: Protocol Services
An S5000 NPG provides the following protocol services.
Fibre Channel service to create N ports and log in to an upstream FC switch.
FCoE service to perform:
Virtualization of FC N ports on an NPG so that they appear as FCoE FCFs to downstream servers.
NPIV service to perform the association and aggregation of FCoE servers to upstream F ports on core switches (through
N ports on the NPG). Conversion of server FLOGIs and FDISCs, which are received over S5000 ENode ports, are
converted into FDISCs addressed to the upstream F ports on core switches.
NPIV Proxy Gateway Functionality
An NPG provides the following functionality in a storage area network.
FIP snooping bridge that provides security for FCoE traffic using ACLs (refer to FCoE Transit chapter).
FCoE gateway that provides FCoE-to-FC bridging. N-port virtualization using FCoE maps exposes upstream F ports as FCF
ports to downstream server-facing ENode ports on the NPG (refer FCoE Maps).
NPIV Proxy Gateway: Terms and Definitions
The following table describes the terms used in an NPG configuration on the S5000.
Table 63. S5000 NPIV Proxy Gateway: Terms and Definitions
Term Description
FC port Fibre Channel port on an S5000 FC module that operates in
autosensing, 2, 4, or 8-Gigabit mode. On an NPIV proxy
gateway, an FC port can be used as a downlink for a server
connection and an uplink for a fabric connection.
F port Port mode of an FC port connected to an end node (N) port
on an S5000 NPIV proxy gateway.
N port Port mode of an S5000 FC port that connects to an F port
on an FC switch in a SAN fabric. On an S5000 NPIV proxy
gateway, an N port also functions as a proxy for multiple
server CNA-port connections.
ENode port Port mode of a server-facing S5000 Ethernet port that
provides access to FCF functionality on a fabric.
CNA port N-port functionality on an FCoE-enabled server port. A
converged network adapter (CNA) can use one or more
Ethernet ports. CNAs can encapsulate Fibre Channel frames
in Ethernet for FCoE transport and de-encapsulate Fibre
Channel frames from FCoE to native Fibre Channel.
DCB map Template used to configure DCB parameters, including
priority-based flow control (PFC) and enhanced transmission
selection (ETS), on CEE ports.
Fibre Channel fabric Network of Fibre Channel devices and storage arrays that
inter-operate and communicate.
FCF Fibre Channel forwarder: FCoE-enabled switch that can
forward FC traffic to both downstream FCoE and upstream
FC devices. An NPIV proxy gateway functions as an FCF to
export upstream F port configurations to downstream server
CNA ports.
FC-MAP FCoE MAC-address prefix The unique 24-bit MAC address
prefix in FCoE packets used to generate a fabric-provided
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