D-Link DI-1750 Reference Manual page 526

15.1.21 Configuration example
Both the router 2621-CLIENT and serial interface 1 of 2621-LAC are encapsulated PPP protocol, LAC
adopts CHAP authentication; CHAP user must input the opposite router user name in prompt; the
password of two routers using CHAP must be the same, router 2621-LAC and 2621-LNS connect with
each other through Ethernet interface 0.
configuration as below：
Client station configuration as below：
username ht1@dlink.com.cn password 123
interface Serial0/0
ip address 11.9.9.1 255.255.255.0
ip (undo) directed-broadcast
encapsulation ppp
ppp chap hostname ht1@dlink.com.cn
LAC configuration as below:
username ht1@dlink.com.cn password 123
interface Serial0/0
ip address 11.9.9.2 255.255.255.0
ip (undo) directed-broadcast
encapsulation ppp
ppp authentication chap
ppp chap hostname ht1@dlink.com.cn
physical-layer speed 115200
vpdn-group 1
request-dialin
domain dlink.com.cn
initiate-to ip 192.168.20.204 priority 1
l2tp (undo) tunnel authentication
local-name lac
protocol l2tp
source-ip 192.168.20.92
LNS configuration as below:
username ht1@dlink.com.cn password 123
vpdn-group 1
accept-dialin
terninate-from lac
l2tp (undo) tunnel authentication
protocol l2tp
virtual-template 1
interface Virtual-Template1
ip address 11.9.9.3 255.255.255.0
ppp authentication chap
ppp chap hostname ht1@dlink.com.cn
Model Name
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