Which fabric service provides information about other logged in nodes after receiving a query from
a node?
A.
Fabric controller
B.
Name server
C.
Management server
D.
Fabric login server
Explanation:
Login types in Switched Fabric
Fabric services define three login types:
• Fabric login (FLOGI): Performed between an N_Port and an F_Port. To log on to the fabric, a
node sends a FLOGI frame with the WWNN and WWPN parameters to the login service at the
predefined FC address FFFFFE (Fabric Login Server). In turn, the switch accepts the login and
returns an Accept (ACC) frame with the assigned FC address for the node. Immediately after the
FLOGI, the N_Port registers itself with the local Name Server on the switch, indicating its WWNN,
WWPN, port type, class of service, assigned FC address and so on. After the N_Port has logged
in, it can query the name server database for information about all other logged in ports.
• Port login (PLOGI): Performed between two N_Ports to establish a session. The initiator N_Port
sends a PLOGI request frame to the target N_Port, which accepts it.
The target N_Port returns an ACC to the initiator N_Port. Next, the N_Ports exchange service
parameters relevant to the session.
• Process login (PRLI): Also performed between two N_Ports. This login relates to the FC-4 ULPs,
such as SCSI. If the ULP is SCSI, N_Ports exchange SCSI-related service parameters.
EMC E10-001 Student Resource Guide. Module 5: Fibre Channel Storage Area Network (FC
SAN)
The original explanation is NOT correct as that is talking about Login types. This is the correct information
“The Fabric Login Server is located at the predefined address of FFFFFE and is
used during the initial part of the node’s fabric login process
The Name Server (formally known as Distributed Name Server) is located at
the predefined address FFFFFC and is responsible for name registration and
management of node ports. Each switch exchanges its Name Server information with other switches in the fabric to maintain a synchronized, distributed
name service.
Each switch has a Fabric Controller located at the predefined address FFFFFD.
The Fabric Controller provides services to both node ports and other switches.
The Fabric Controller is responsible for managing and distributing Registered
State Change Notifications (RSCNs) to the node ports registered with the Fabric
Controller. If there is a change in the fabric, RSCNs are sent out by a
switch to the attached node ports. The Fabric Controller also generates Switch
Registered State Change Notifications (SW-RSCNs) to every other domain
(switch) in the fabric. These RSCNs keep the name server up-to-date on all
switches in the fabric
FFFFFA is the Fibre Channel address for the Management Server. The Management
Server is distributed to every switch within the fabric. The Management Server
enables the FC SAN management software to retrieve information and administer the fabric”
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