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

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