Nortel Networks 8000 - Manual (Page 243)

7 LAPB and X.25 configuration
Nortel Secure Router 8000 Series
Configuration -WAN Access
# Configure other LAPB parameters. (If the link is of good quality, and a higher rate is
required, you can increase the traffic control parameter modulo to 128 and the window-size
can be increased to 127. The parameters must be the same on both directly connected ends.)
[RouterA-Serial1/0/0] lapb module 128
[RouterA-Serial1/0/0] lapb window-size 127
[RouterA-Serial1/0/0] shutdown
[RouterA-Serial1/0/0] undo shutdown
Step 2 Configure Router B.
# Configure the interface.
system-view
[RouterB] interface serial1/0/0
[RouterB-Serial1/0/0] ip address 202.38.160.2 255.255.255.0
# Configure the link layer protocol of the interface as LAPB and specify its operating mode as
DCE.
[RouterB-Serial1/0/0] link-protocol lapb dce
# Configure other LAPB parameters. (If the link is of good quality, and a higher rate is
required, you can increase the traffic control parameter modulo to 128 and the window-size
can be increased to 127. The parameters must be the same on both directly connected ends.)
[RouterB-Serial1/0/0] lapb modulo 128
[RouterB-Serial1/0/0] lapb window-size 127
[RouterB-Serial1/0/0] shutdown
[RouterB-Serial1/0/0] undo shutdown
Step 3 Verify the configuration.
# Using the display interface command, you can view the configuration of the interface. For
example, the following displays the configuration of Serial 1/0/0 on Router A.
[RouterA] display interface Serial 1/0/0
Serial1/0/0 current state : UP
Line protocol current state : UP
Description : NORTEL, Nortel Series, Serial1/0/0 Interface
The Maximum Transmit Unit is 1500 bytes, Hold timer is 10(sec)
Internet Address is 202.38.160.1/24
Link-protocol is LAPB
LAPB DTE, module 128, window-size 127, max-frame 12040, retry 10
Timer: T1 3000, T2 1500, T3 0 (milliseconds), IP-protocol
state DISCONNECT, VS 0, VR 0, Remote VR 0
IFRAME 0/0, RR 0/0, RNR 0/0, REJ 0/0
FRMR 0/0, SABM 0/0, DM 0/0, UA 0/0
DISC 0/0, invalid ns 0, invalid nr 0, link resets 0
QoS max-bandwidth : 64 Kbps
Output queue : (Urgent queue : Size/Length/Discards) 0/50/0
Output queue : (Protocol queue : Size/Length/Discards) 0/1000/0
Output queue : (FIFO queue : Size/Length/Discards) 0/256/0
Physical layer is synchronous,Baudrate is 0 bps, Interface is no cable
300 seconds input rate 0.00 bytes/sec, 0.00 packets/sec
300 seconds output rate 0.00 bytes/sec, 0.00 packets/sec
Usage of input bandwidth: 0.00%, Usage of output bandwidth: 0.00%
0 packets input, 0 bytes, 0 no buffers
0 packets output, 0 bytes, 0 no buffers
7-40 Nortel Networks Inc. Issue 5.3 (30 March 2009)