Example Configurations for PPP over Ethernet (PPPoE)

Below are a couple example configurations for PPPoE. Note that you can run into MTU issues when trying to use OSPF over PPPoE. This can easily be resolved by using the "ip ospf mtu-ignore" command as the dialer interface's MTU is 1492 while the virtual-template's (virtual-access) MTU is 1500.

*** Client ***

interface Ethernet0/0

 pppoe enable

 pppoe-client dial-pool-number 1

!

interface Dialer1

 ip address 142.1.35.5 255.255.255.0

 encapsulation ppp

 dialer-pool 1

 dialer persistent
*** Server ***
vpdn enable

!

vpdn-group CISCO

 accept-dialin

 protocol pppoe

 virtual-template 1

!

interface Ethernet0/0

 pppoe enable

!

interface Virtual-Template1

 ip address 142.1.35.3 255.255.255.0

The next example is using DHCP to assign the client their IP address:

*** Client ***
interface Ethernet0/1

 pppoe enable

 pppoe-client dial-pool-number 1

!

interface Dialer1

 ip address dhcp

 encapsulation ppp

 dialer pool 1

 dialer persistent
*** Server ***
ip dhcp excluded-address 191.1.45.1 190.12.45.3

!

ip dhcp pool MYPOOL

 network 191.1.45.0 255.255.255.0

!

vpdn enable

!

vpdn-group CISCO

 accept-dialin

 protocol pppoe

 virtual-template 1

!

interface Ethernet0/0

 pppoe enable

!

interface Virtual-Template1

 ip address 191.1.45.5 255.255.255.0

 peer default ip address dhcp-pool MYPOOL