Link-Protocol Lapb - H3C MSR 20-20 Command Reference Manual

436 C 26: LAPB
HAPTER
View
Parameter
Description
Related command:
Example

link-protocol lapb

Syntax
View
Parameter
Description
X.25 C C
AND ONFIGURATION OMMANDS
Interface view
k-value: Maximum number of sequence numbered frames to be acknowledged by
DTE or DCE during any specified time. If the modulo is 8, the value of the window
parameter K ranges 1 to 7. If the modulo is 128, the value of the window
parameter K ranges 1 to 127.
Use the
lapb window-size
K.
Use the
undo lapb window-size
The default is 7.
lapb modulo.
# Set the LAPB window parameter K on the interface Serial 2/0 to 5.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] lapb window-size 5
link-protocol lapb [dce | dte ] [ ip | multi-protocol ]
Interface view
dce: Specifies DCE mode of LAPB.
dte: Specifies DTE mode of LAPB.
ip: Specifies the upper layer protocol as IP.
multi-protocol: Specifies the upper layer protocol as multi-protocol.
Use the
link-protocol lapb
interface as LAPB.
By default, the link layer protocol of an interface is PPP.
When the link layer protocol is LAPB, the default operating mode is DTE, and the
upper layer protocol is IP.
Though LAPB is a layer-2 protocol of X.25, it can act as an independent link-layer
protocol for simple data transmission. Generally, LAPB can be used when two
routers are directly connected with a dedicated line. At that time one end works in
the DTE mode, and the other in the DCE mode.
command to configure the LAPB window parameter
command to restore the default.
command to specify the link layer protocol of the