Reference Guide

servers over the NPIV proxy gateway to FC switches in the fabric. An FCoE map virtualizes the upstream
SAN fabric as an FCF to downstream CNA ports on FCoE-enabled servers as follows:
• As soon as an FC N port comes online (the no shutdown command), the NPG starts sending FIP
multicast advertisements, which contain the fabric name derived from the 64-bit worldwide name
(WWN) of the principal SAN switch. (The principal switch in a fabric is the FC switch with the lowest
domain ID.)
• When you apply the FCoE map to a server-facing Ethernet port in ENode mode, ACLs are
automatically configured to allow only FCoE traffic from servers that perform a successful FLOGI on
the FC switch. All other traffic 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 traffic 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 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 50. 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
640
NPIV Proxy Gateway