Fibre Channel Node Port:
Each node has one or more node ports. Node port is a hardware function used for sending and Receiving information via the Fibre Channel Interface.
Each node port has two unique ID’s.
1. Port_Name
2. N_Port_ID
Port_name => Unique 64 bit identifier assigned to the port at the time of manufacturing.
Used for Management purposes or when port identification is required.
N_Port_ID => Unique 24 bit identifier assigned at the time of initialization of node port and its attached topology.
Since it is 24 bit, the maximum size of Fibre Channel Network is 2^24 ports.
Used for Routing the information from sending port to receiving port and also used by receiving port to examine, whether the information delivered to correct port or not.
N_Port_ID may change, when the configuration is changed. (Because of this, Port_name should be used for identification of port)
Port is further identified based on the topology it supports. For example, to support arbitrated loop topology, the node port should capable of performing loop specific protocols. This kind of node port is called NL_Port.
Each port has separate Transmit and Receive function.
Port Transmit Function:
Port transmit function contains an encoder that transforms binary data into the format suitable for serial transmission by embedding clock information and frequency distribution.
After encoding, information is serialized and transmitted one bit at a time.
Port Receive Function:
Port receive function receives the serial data, recovers clock information from data stream, deserialize the received data, and decodes deserialized information.
Each node has one or more node ports. Node port is a hardware function used for sending and Receiving information via the Fibre Channel Interface.
Each node port has two unique ID’s.
1. Port_Name
2. N_Port_ID
Port_name => Unique 64 bit identifier assigned to the port at the time of manufacturing.
Used for Management purposes or when port identification is required.
N_Port_ID => Unique 24 bit identifier assigned at the time of initialization of node port and its attached topology.
Since it is 24 bit, the maximum size of Fibre Channel Network is 2^24 ports.
Used for Routing the information from sending port to receiving port and also used by receiving port to examine, whether the information delivered to correct port or not.
N_Port_ID may change, when the configuration is changed. (Because of this, Port_name should be used for identification of port)
Port is further identified based on the topology it supports. For example, to support arbitrated loop topology, the node port should capable of performing loop specific protocols. This kind of node port is called NL_Port.
Each port has separate Transmit and Receive function.
Port Transmit Function:
Port transmit function contains an encoder that transforms binary data into the format suitable for serial transmission by embedding clock information and frequency distribution.
After encoding, information is serialized and transmitted one bit at a time.
Port Receive Function:
Port receive function receives the serial data, recovers clock information from data stream, deserialize the received data, and decodes deserialized information.
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