White Papers

• When you apply the FCoE map to a server-facing Ethernet port in ENode mode, ACLs are automatically congured to allow only FCoE
trac from servers that perform a successful FLOGI on the FC switch. All other trac on the VLAN is denied.
You can specify one or more upstream N ports in an FCoE map. The FCoE map also contains the VLAN ID of the dedicated VLAN used to
transmit FCoE trac between the SAN fabric and servers.
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 trac 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 Denitions
The following table describes the terms used in an NPG conguration on the S5000.
Table 63. S5000 NPIV Proxy Gateway: Terms and
Denitions
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.
NPIV Proxy Gateway 609