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TN211-13.DOC
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1993-08-09
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TN211_13.DOC
SYSOP REMOTE PARAMETERS (6-11)
**********************************
Parameter 6, NODES BROADCAST INTERVAL
-------------------------------------
The NODES broadcast interval controls the "heart" of TheNet's dynamic
routing process. It is this timer that sets the frequency of broadcasts that
includes node aliases, callsigns, routing, and obsolescence information. The
broadcast timer also initiates action to systematically decrement failed nodes
from the routing tables. For proper synchronization of network actions, it's
recommended the value selected for the broadcast interval be the same on all
nodes in the system. Short intervals will insure greater network routing
reliability but at the expense of increased network overhead. Longer intervals
decrease overhead but yields poorer routing reliability. The suggested value
of 1800 seconds (30 minutes) achieves a reasonable balance. A 30 minute
interval will cause failed nodes to be decremented out of neighbor routing
tables within 3 hours or less. A setting of "0" will disable the timer (not
recommended).
(Range: 0-65535)
Parameter 7, FRACK
------------------
Specifies the time in seconds a point-to-point level 2 frame retry will be
sent to a node or a user if a previous frame isn't acknowledged. The value
chosen will vary with the type of service the node performs. Small values may
unnecessarily increase the node key-up cycle in multi-user environments. Large
values on single transmitter links will slow throughput. Values suggested for
multi-user service are "3-6" and, "1-2" for single/dual transmitter links.
(Range: 1-15)
Parameter 8, MAXFRAME
---------------------
Specifies the maximum number of point-to-point level 2 frames that can be
sent to a node or a user without acknowledgement. Small values on busy high-
speed links will dramatically increase the node key-up cycle due to increased
frame acknowledgement requirements. Larger values on solid links will allow
improved throughput efficiency. If keyboard operators are being prematurely
disconnected on access nodes, perhaps over-aggressive server TNC parms are at
fault. Suggested value is 7 frames.
(Range: 1-7)
Parameter 9, LINK MAXIMUM TRIES
-------------------------------
Sets the number of attempts a point-to-point level 2 circuit will be tried
between a user or a node before a failure is reported. When level 4 transport
end-to-end circuits are involved, the number of times the node transmitter is
keyed on a failed link is the product of the values for parameters 9 and 19.
Suggested value is 7 tries.
(Range: 0-127)
Parameter 10, VALIDATE CALLSIGNS
---------------------------------
Determines if incoming callsigns will be verified against the internal
callsign validation routine. It's to both user and NodeOp's advantage to
implement callsign validation. If not enabled, a distant user mistyping a
node alias, may have to wait a considerable length of time before receiving an
appropriate node response. If the NodeOp is desiring to allow user downlinks
to KA-node aliases, possibly these aliases could be selected to satisfy the
callsign verification criteria, i.e., no more than 6 characters with one
number included. For example: CDXB0X (note the zero in "B0X"). Callsign
validation ENABLED also prevents those who forget to install their callsign
into the TNC, from uplinking to the node. The node response to a NOCALL
is "Node busy." Suggested default is "1."
(Range: 0-1)
Parameter 11, HOST MODE CONNECTS
--------------------------------
The primary function of host mode is to allow the NodeOp to service the node
while on-site. However, a user can connect to a terminal or other device
attached to the node's RS-232 port if the following conditions are met:
1. Parameter 11, host mode connects is ENABLED (1).
2. The terminal or other RS-232 device isn't actively CONNECTED to the node.
Host mode is a single user port, thus allows only one user at a time to CONNECT
to it. OFF (0), ON (1).
(Range: 0-1)