Hello everyone,
Today, I will introduce how to handle the problem that PPPOE can't work correctly.
Network Topology
Figure 1-1 PPPOE can't work correctly
Fault Description
l AR2 works as a PPPoE server, AR1 will get access to the internet by dialing to AR2.
l AR2 needs to authenticate AR1, the dial username is Huawei, the password is huawei123, the authentication method is chap.
l Other parameter is default
The customer can not ping from one side (101.1.1.1) to the other side (202.1.1.1).
Figure 1-2 Ping 202.1.1.1
Configuration Files
AR1
#
acl number 3002
rule 5 permit ip source 192.168.10.0 0.0.0.255
#
interface Dialer1
link-protocol ppp
ppp authentication-mode chap
ppp chap user huawei
ppp chap password cipher huawei123
ip address ppp-negotiate
dialer user user2
dialer bundle 1
nat outbound 3002
#
interface GigabitEthernet2/0/0
pppoe-client dial-bundle-number 1
#
ip route-static 0.0.0.0 0.0.0.0 Dialer1
AR2
#
ip pool pool1
gateway-list 192.168.10.1
network 192.168.10.0 mask 255.255.255.0
#
aaa
local-user huawei password cipher huawei123
local-user huawei privilege level 0
local-user huawei service-type ppp
#
interface Virtual-Template1
ppp authentication-mode pap
remote address pool pool1
ppp ipcp dns 10.10.10.10 10.10.10.11
timer hold 30
ip address 192.168.10.1 255.255.255.0
#
interface GigabitEthernet1/0/0.100
dot1q termination vid 100
pppoe-server bind Virtual-Template 1
Troubleshooting Location
Step 1. Check the ppp lcp parameters. Notice the authentication parameters. Only PPPOE servers need to authenticate PPPoE clients, it's not necessary to authenticate PPPoE servers on PPPoE clients.
Step 2. Check the ppp ipcp paramters. Such as the IP pool. After changing the IP pool network, the PPPoE client can get an IP address and can get access to the PPPoE client.
Root Cause
Check the parameters about ppp authentication and ppp ipcp.
That is all I want to share with you!
