Cabletron Systems Netlink FRX4000, Руководство пользователя

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Line Speed
is the data transmission rate in bits per second, and the clock speed on a serial port
when the port is a physical DCE (i.e., the attached I/O cable is DCE). If this port is a
physical DTE, specify the line speed that matches (as closely as possible) that of the
device connected directly to the port.
Retransmission Period
is the length of time before the node will transmit an I-frame if the previous trans-
mission is not acknowledged. If the period expires, the timer will be reset and a super-
visory frame will be transmitted demanding immediate acknowledgement. The
Maximum Retransmissions
(see that entry) counter will also be incremented.
The default value of
2000 ms
allows avoidance of unnecessary retransmission of
frames that have merely been delayed.
Maximum Retransmissions
is the maximum number of times the node will attempt to send an I-frame after a
Retransmission Period
expiration. A larger value for this parameter increases the prob-
ability of an eventual successful transmission, but a smaller value permits faster
detection of a permanent error condition.
Maximum Bytes per Frame
is the maximum frame size that will be transmitted on the port.
Generate Clock
specifies whether the port will generate the clock necessary to synchronize traffic over
the link. If the port is a physical DCE (determined by the port's I/O cable interface),
set this parameter to
Y
, since the physical DCE generates clock. If the port is DTE, set
the parameter to
N
.
Rcv Clock (TT) from DTE
allows the clock to be looped back from the DTE using the TT (Terminal Timing)
signal, which can be helpful on high-speed lines. Generally, if the local interface is
physical DCE and the line speed is above 256 Kbps, this parameter should be set to
Y
.
(Make sure the remote DTE is configured to provide the terminal timing.)
Answer Non-Configured
will (if
Y
) allow the HPAD to respond to all devices on the line. If
N
, the HPAD will
respond only to those devices that are configured on the node.
Activate Connection w/o poll
will (if enabled) activate the TPAD connection without a poll of the connected device.
Clear VC on Last Device Down
if
Y
, causes the virtual circuit to be cleared when no terminals are using it.
Multidrop
specifies whether transmisison will be multidrop (several stations between end points)
or point-to-point.
Slow Poll Retry Count
applicable only to connections configured for multidrop, specifies how many times
the control unit (CU) will be polled (if it is not responding) before it is put on the "slow