AIS AI2524 Task Lapb Values Command Default Parameter, Modulus, Siz e, Seconds, Milliseconds

AI2524 Router Card User’s Manual

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		Values
	Command	or	Default
Parameter)
		Ranges
Set the modulo.	lapb modulo	8 or 128	8
	modulus
Set the window	lapb k window-	1- (mod-	7
size (K).	size	ulo minus
		1) frames
Set the maxi-	lapb n1 bits	Bits (must	Based on
mum bits per		be a mul-	hardware
frame (N1).		tiple of 8)	MTU and
			protocol
			overhead
Set the count for	lapb n2 tries	1--255	20
sending frames		tries
(N2).
Set the retrans-	lapb t1 milli-	1--64000	3000
mission timer	seconds	millisec-
(T1).		onds
Set the hard	lapb inter-		0 (dis-
ware outage	face-outage		abled)
period.	milliseconds
Set the idle link	lapb t4 seconds		0 (dis-
period (T4).			abled)

Page 12-50	August 1997
	2524UM