3Com Router 3031, Command Reference Manual

Page: 361 / 838

LAPB and X.25 Configuration Commands 361
Example
Display XOT link information.
[3Com] display x25 xot
SVC 1024: ( ESTAB )
tcp peer ip: 10.1.1.1, peer port: 1998
tcp local ip: 10.1.1.2, local port: 1024
socket keepalive period: 5, keepalive tries: 3
come interface name: Serial0/0/0-10.1.1.1-1024
go interface name: Serial0/0/0:
The above information indicates: there is one established XOT link via SVC, whose
peer IP is 10.1.1.1, peer port is 1998, local IP is 10.1.1.2, local port is 1024,
keepalive period of socket is 5 seconds, keepalive tries are 3, come interface name
is Serial0/0/0-10.1.1.1-1024 (XOT interface), and go interface name is Serial0/0/0.
lapb max-frame
Syntax
lapb max-frame n1-value
undo lapb max-frame
View
Interface view
Parameter
n1-value: The value of the parameter N1 in bits, and its value ranges from 1096 to
12104.By default, the parameter N1 of LAPB is 12032.
Description
Using the lapb max-frame command, you can configure the LAPB parameter N1.
Using the undo lapb max-frame command, you can restore the default value.
N1 shall indicate the maximum bit of I frame that DCE or DTE wish to receive from
DTE or DCE, and its value is maximum transmission unit (MTU) plus the total bytes
of protocol header times 8, which stipulates the maximum length of transmission
frame.
Example
Set the parameter N1 of LAPB on the interface Serial 0/0/0 is 1160.
[3Com-Serial0/0/0] lapb max-frame 1160
lapb modulo Syntax
lapb modulo { 128 | 8 }
undo lapb modulo