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AI2524 Router Card User’s Manual
Page 12-50 August 1997
2524UM
ters can be modified to change LAPB protocol performance on
particular link. Because X.25 operates the PLP on top of the LAPB
protocol, these tasks apply to both X.25 links and LAPB links. The pa-
rameters and their default values are summarized in this table.
Task (LAPB
Parameter)
Command
Values
or
Ranges
Default
Set the modulo.
lapb modulo
modulus
8 or 128 8
Set the window
size (K).
lapb k
window-
siz
e
1- (mod-
ulo minus
1) frames
7
Set the maxi-
mum bits per
frame (N1).
lapb n1
bits
Bits (must
be a mul-
tiple of 8)
Based on
hardware
MTU and
protocol
overhead
Set the count for
sending frames
(N2).
lapb n2
tries
1--255
tries
20
Set the retrans-
mission timer
(T1).
lapb t1
milli-
seconds
1--64000
millisec-
onds
3000
Set the hard
ware outage
period.
lapb inter-
face-outage
milliseconds
0 (dis-
abled)
Set the idle link
period (T4).
lapb t4
seconds
0 (dis-
abled)