Command Reference Guide

3Com Router 5000 Family and Router 6000 Family lapd timer ● 211
Command Reference
lapd timer
Purpose Use the lapb timer command to configure the LAPB timers T1, T2 and T3.
Use the undo lapb timer command to restore their default values.
Syntax lapb timer { t1 t1-value | t2 t1-value | t3 t3-value }
undo lapb timer { t1 | t2 | t3 }
Parameters t1-value
The value of timer T1 (in milliseconds). Valid values are
1 to 64000.
If no value is specified, the default is 3000
milliseconds.
t2-value
Value of the timer T2 (in milliseconds). Valid values are
1 to 32000 milliseconds.
If no value is specified, the default is 1500
milliseconds.
t3-value
Value of the timer T3 (in milliseconds). Valid values are
0 to 255 seconds.
If no value is specified, the default is 0 second.
Example Set the LAPB timer T1 on Serial0/0/0 to 3000ms.
[3Com-Serial0/0/0] lapb timer t1 3000
View This command can be used in the following views:
■ Interface view
Description T1 is a transmission timer. When T1 expires, DTE (DCE) will start retransmission. The
value of T1 shall be greater than the maximum time between the sending of a frame
and the receiving of its response frame.
T2 is a reception timer. When it expires, the DTE/DCE must send an acknowledgement
frame so that this frame can be received before the peer DTE/DCE T1 timer expires
(T2<T1).
T3 is an idle channel timer, when it expires, the DCE reports to the packet layer that
the channel stays idle for a long time. T3 should be greater than the timer T1 (T3>T1)
on a DCE. When T3 is 0, it indicates that it does not function yet.