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Configuration Guide - DCN and Server Management

CloudEngine 8800, 7800, 6800, and 5800 V200R003C00

This document describes the configurations of Trill, FCoE, DCB, and NLB Server Cluster Association.
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Basic Concepts of FC

Basic Concepts of FC

As shown in Figure 2-2, FC involves the following entities: Fabric, FCF, NPV, WWN, FC_ID, Domain_ID, Area_ID, Port_ID, FC-MAP, Zone, and Interface Role.

Figure 2-2 FC networking
  • Fabric

    A fabric is the network topology where servers and storage devices are connected through one or more switches.

  • FCF

    A Fibre Channel Forwarder (FCF) is a switch that supports both FCoE and FC, and connects the SAN and LAN. An FCF can forward FCoE packets and encapsulate or decapsulate FCoE packets.

  • NPV

    An NPort Virtualization (NPV) switch is located at the edge of a fabric and between an ENode and an FCF to forward traffic of the ENode to the FCF.

  • WWN

    A World Wide Name (WWN) identifies an entity on the fabric and SAN. A World Wide Node Name (WWNN) identifies an ENode and a World Wide Port Name (WWPN) identifies a device interface. Each entity on the SAN has been allocated a WWN before delivery.

  • FC_ID

    Figure 2-3 FC_ID

    FC_ID is also called FC address. On a SAN, the FC protocol uses FC addresses to access entities. An FC_ID identifies an N_Port on an ENode.

  • Domain_ID

    The Domain_ID, namely, domain ID, identifies an FC switch. During packet transmission, FC switches use domain IDs to route and forward packets.

  • Area_ID

    One or more N_Ports on the same node can be assigned to an area, which is identified by an area ID.

  • Port_ID

    The Port_ID field identifies an N_Port.

  • FC-MAP

    Figure 2-4 FPMA

    An FCoE frame uses a locally unique MAC address (unique only within the local Ethernet subnet). The locally unique MAC address is dynamically assigned to an ENode by an FCF or specified on an ENode and acknowledged by an FCF. A locally unique MAC address is called a fabric-provided MAC address (FPMA). An FPMA has an FC_ID and a 24-bit FCoE MAC Address Prefix (FC-MAP).

  • Zone

    You can configure zones and add different N_Ports to the zones to isolate the N_Ports, achieving access control.

    A zone set is a set of zones and is the logical control unit between a zone and an instance. It simplifies configurations. Only one zone set can be activated for each instance.

  • Interface role

    Figure 2-5 Interface role
    On the traditional FC network, FC devices are connected through FC interfaces. FC interfaces are classified into N_Ports, F_Ports, and NP_Ports:
    • N_Port: FC device interface that connects to an FC switch. An FC device can be a server or storage device.
    • F_Port (fabric port): FC switch interface that connects to an FC device and provides fabric access services for the FC device.
    • N_Port Proxy (NP_Port): NPV switch interface that connects to the FCF.
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Updated: 2019-05-08

Document ID: EDOC1100004349

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