Dell PowerConnect Brocade 300 Fabric OS Administrator's Guide v7.1.0 - Page 43
Understanding Fibre Channel Services, Fibre Channel services overview, In
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Chapter Understanding Fibre Channel Services 1 In this chapter •Fibre Channel services overview 43 •Management server 44 •Platform services 44 •Management server database 45 •Topology discovery 49 •Device login 51 •High availability of daemon processes 53 Fibre Channel services overview Fibre Channel services define service functions that reside at well-know addresses, as illustrated in Figure 1. A well-known address is a reserved three-byte address for each service. Services are provided to either nodes or management applications in the fabric. FIGURE 1 Well-known addresses Fabric Login - The Fabric Login server assigns a fabric address to a fabric node, which allows it to communicate with services on the switch or other nodes in the fabric. The fabric address is a 24-bit address (0x000000) containing three 3-byte nodes. Reading from left to right, the first node (0x000000) represents the domain ID, the second node (0x000000) the port area number of the port where the node is attached, and the third node (0x000000) the arbitrated loop physical address (AL_PA), if applicable. Directory server - The directory server or name server registers fabric and public nodes and conducts queries to discover other devices in the fabric. Fabric controller - The fabric controller provides State Change Notifications (SCNs) to registered nodes when a change in the fabric topology occurs. Time server - The time server sends the time to the member switches in the fabric from either the principal switch or, if configured, the primary fabric configuration server (FCS) switch. Refer to Chapter 7, "Configuring Security Policies," for additional information on FCS policies. Fabric OS Administrator's Guide 43 53-1002745-02
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