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
About Brian Dennis, CCIE #2210:
Brian Dennis has been in the networking industry for more than 22 years, with a focus on Cisco networking for the past 16 years. Brian achieved his first CCIE in Routing & Switching in 1996, and is currently the only ten year CCIE that holds five CCIE certifications. Prior to working with INE, Brian taught and developed CCIE preparation courses for various well known training organizations. Brian not only brings his years of teaching experience to the classroom, but also years of real world enterprise and service provider experience.
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6 Responses to “Example Configurations for PPP over Ethernet (PPPoE)”
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Hi Brian,
But in that case server will not be able to ping its own interface. To ping own interface of server
*** 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
ip address 191.1.45.5 255.255.255.0
pppoe enable
!
interface Virtual-Template1
ip unnumbered e0/0
peer default ip address dhcp-pool MYPOOL
Please correct if i am wrong.
In Lab do we need to ping own interface of server in VPDN’s.
Regards
Saptanshu
Thank you.
Follow up questions:
Which interface you apply QoS, NBAR-prot-discovery, NetFlow-export, etc?
Dialer interface would not accept any MQC policy.
Any way to get a “virtual-template” for a ppoe client?
“match-protocol” with NBAR does not work (no matches) when the policy is assigned to ethernet interface.
interface Ethernet1
bandwidth 128
no ip address
pppoe enable group global
pppoe-client dial-pool-number 1
service-policy output QOS-OUT
!
interface Dialer1
mtu 1492
bandwidth 128000
ip address negotiated
ip accounting output-packets
ip accounting precedence output
ip nbar protocol-discovery
ip flow ingress
ip flow egress
ip nat outside
encapsulation ppp
dialer pool 1
ppp pap sent-username [....] password [...]
policy-map QOS-OUT
class DNS
priority 8
class class-default
fair-queue
random-detect
random-detect precedence 1 10 20 2
random-detect precedence 5 100 200 11
random-detect precedence 7 100 200 20
shape average 100000
[...] Complete Article from InternetworkExpert. [...]
[...] PPP supports authentication [PAP, CHAP, MS-CHAP], multilinking & routing, know virtual templates, PPPoE [dialin & client] – Watch IOS!!!!! e.g. http://blog.ine.com/2008/01/20/example-configurations-for-ppp-over-ethernet-pppoe/ [...]
hi Brian ,
thank you for that post and please can you send the best reference cco docs for the pppoe for r&s version 4.0 . Thank you for your help .
stychu
[...] Brian Dennis => http://blog.internetworkexpert.com/2008/01/20/example-configurations-for-ppp-over-ethernet-pppoe/ [...]