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Resumen del manual
Octets The total octets received from or transmitted to an adjacent SDLC link station since link station startup, expressed as a rate (octets/second). This includes the address, control, and information .eld of I-frames only. Retransmits In the Rx Statistics window, this is the total number of I-frames retransmitted by the remote link station because the N(s) received from that link station indicated that one or more I-frames sent by or to that station were lost. In the Tx Statistics window, this is the total number of I-frames retransmitted to a remote link station because the N(r) received from that link station indicated that one or more I-frames sent by or to that station were lost. This event causes the .rst missing I-frame of a window and all the subsequent I-frames to be retransmitted. This value is expressed as a rate (retransmits/second). Viewing SDLC Status Chapter 8 Chapter 8 BSC Interactive Configuration Configuring BSC Interactive ports; BSCI Subscriber Information; configuring devices connected to BSCI ports FRX4000, FRX6000, and SmartSwitch 1800 devices support binary synchronous communications (BSC) Interactive ports, used to connect IBM 3270 hosts to remote control units (CU) over frame relay or X.25. For each physical port con.gured to run BSC Interactive (BSCI), three con.guration windows are provided: • The BSCI Port Con.guration window allows you to con.gure basic parameters related to BSCI port operation; • The BSCI Subscriber Information window provides information on local and remote subscribers for each BSCI port; • The BSCI Device Information window lets you de.ne the devices connected to the BSCI ports. These windows and their functions are described in the following sections. Configuring BSCI Ports Using the BSCI Port Con.guration window, you can con.gure basic operating parameters for each of your BSCI ports. To access the window: 1. Click mouse button 3 on the BSCI port of interest to display the Port Menu. 2. Drag down to BSCI Port Configuration, and release. The BSCI Port Configuration window, Figure 8-1, will appear. BSC Interactive Configuration Figure 8-1. BSCI Port Con.guration The BSCI Port Con.guration window allows you to con.gure the following parameters: Max Frame Size Use this .eld to specify the maximum frame size that will be allowed to pass through this BSCI port. The default value for this parameter is 4105. Configuring BSCI Ports BSC Interactive Configuration Line Speed This .eld speci.es the data transmission rate in bits per second. If this port is a physical DTE, specify the line speed that matches the speed of the device connected directly to the port. If the port is a physical DCE (i.e., the attached I/O cable is DCE) specify the clock speed of the serial port you are con.guring. Valid values for this parameter are: 75, 150, 300, 600, 1200, 2400, 4800, 9600, 14400, and 19200. The default value for this parameter is 9600. Retransmission Period This is the length of time (in milliseconds) before the FRX or SmartSwitch 1800 will retransmit a data frame if the previous transmission of that data frame was not acknowledged. If the time expires, the timer will be reset, the data frame will be retransmitted, and the Max Retransmissions counter (see below) will be incremented. The default value of 2000 milliseconds allows avoidance of unnecessary retransmission of frames that have merely been delayed. Max Retransmissions This is the maximum number of times the FRX or SmartSwitch 1800 will attempt to retransmit a data frame after the Retransmission Period (see above) expires. A larger value for this parameter increases the probability of an eventual successful transmission, but a smaller value permits faster detection of a permanent error condition. The default value for this parameter is 5. Start Sync Chars This is the number of synchronization characters that will be added to the beginning of each frame. The default value for this parameter is 2. Trailing Pad Chars This is the number of padding characters that will be appended to each frame. This ensures that the last signi.cant character is sent before the data transmitter switches off. The default value for this parameter is 1. Poll Interval The amount of time (in milliseconds) between passes through the polling list. The default value for this parameter is 500. No Response Timer This timer begins after the FRX or SmartSwitch 1800 transmits a general poll or a data frame. It is the amount of time (in seconds) before the FRX or SmartSwitch 1800 transmits an NAK-EOT-General Poll sequence and increments the No Response Retries count (see below). The timer will stop upon receipt of any valid frame from the line. The default value for this parameter is 2. No Response Retries If a device is not responding to a poll, this count speci.es how many times the device will be polled before the general poll sequence bypasses the device and moves on to the next one. The default value for this parameter is 5. Configuring BSCI P...
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