3Com 3031 Command Reference Manual page 362

362 C 4: L L P
HAPTER INK AYER ROTOCOL
View
Interface view
Parameter
128: Using modulus 128 numbering view.
8: Using modulus 8 numbering view.
Description
Using the lapb modulo command, you can specify the LAPB frame numbering
view (also called modulo). Using the undo lapb modulo command, you can restore
the default value.
By default, the LAPB frame protocol view is modulo 8.
There are two LAPB frame numbering views: modulo 8 and modulo 128. Each
information frame (I frame) is numbered in sequence, ranging from 0 to the
modulo minus 1. In addition, sequential numbers will cycle within the range of
modulo.
Modulo 8 is a basic view, LAPB can implement all the standards via the view. It is
sufficient for most links.
For the related command, see lapb window-size.
Example
Set the LAPB frame numbering view on Serial0/0/0 to modulo 8.
[3Com-Serial0/0/0] lapb modulo 8
lapb retry Syntax
lapb retry n2-value
undo lapb retry
View
Interface view
Parameter
n2-value: The value of N2, its value ranges from 1 to 255.By default, the
parameter N2 of LAPB is 10.
Description
Using the lapb retry command, you can configure LAPB parameter N2. Using the
undo lapb retry command, you can restore the default value.
The value of N2 indicates the maximum retries that DCE or DTE sends one frame
to DTE or DCE.