From: Jeremy (jeremy19@cox.net)
Date: Fri Jun 17 2005 - 12:22:59 GMT-3
I have been playing with PPPoX configurations, in an attempt to understand the differences between PPPoATM, FR, Ethernet, and Dot1Q vlans.  It would appear that all of the configurations are similar with the exception of PPP over Ethernet.  Could somebody help clarify why the dialer configuration is required on PPPoEthernet?  Here are some example configs I threw together this morning (haven't labbed them up yet.):
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RouterA							RouterB
---------------------------------------------------------------------------------------------
username RouterB password cisco				username RouterA password cisco
interface Lo0						interface Lo0
ip address 192.168.1.1 255.255.255.0			ip address 192.168.1.2 255.255.255.0
interface virtual-template 1				interface virtual-template 1
encapsulation ppp					encapsulation ppp
ip unnumbered loopback0					ip unnumbered loopoback0
ppp authentication chap					ppp authentication chap
ppp chap hostname RouterA				ppp chap hostname RouterA
ppp chap password cisco					ppp chap password cisco
mtu 1492						mtu 1492
                
!PPPoATM (Back to Back) Configuration		
interface atm 1/0.1 point-to-point			interface atm 1/0.1 point-to-point
pvc 1/101						pvc 1/101
encapsulation aal5cisco ppp virtual-template 1		encapsulation aal5cisco ppp virtual-template 1
                
!PPPoFrame-Relay (Back to Back)Configuration		
interface serial0/0					interface serial0/0
no ip address						no ip address
encap frame						encap frame
no arp frame						no arp frame
no frame inverse					no frame inverse
no keepalive						no keepalive
                
interface serial0/0.1 point-to-point			interface serial0/0.1 point-to-point
frame-relay interface-dlci 102 ppp virtual-template 1	frame-relay interface-dlci 102 ppp virutal-template1
                
!PPPoEthernet Configuation		
vpdn enable						vpdn enable
vpdn-group 2						vpdn-group 2
accept dialin						accept dialin
protocol pppoe						protocol pppoe
pppoe limit per-mac 25					pppoe limit per-mac 25
virtual-template 1					virtual-template 1
                
interface ethernet 0					interface ethernet 0
ppoe enable						ppoe enable
protocol pppoe						protocol pppoe
ppoe-client dial pool 1					ppoe-client dial pool 1
                
!PPPoEthernet (Dial-out/Client)	Configuration?!?		
dialer-list 1 protocol ip permit			dialer-list 1 protocol ip permit
interface Dialer 1					Interface Dialer 1
ip unnumbered loopback0					ip unnumbered loopback0
dialer pool 1						dialer pool 1
dialer-group 1						dialer-group 1
encapsulation ppp					encapsulation ppp
                
!PPPoDot1Q Configuration		
interface fastethernet 1/0				interface fastethernet 1/0
encapsulation dot1q 123					encapsulation dot1q 123
ppoe enable						ppoe enable
        
vpdn group 2						vpdn group 2
accept dialin						accept dialin
protocol pppoe						protocol pppoe
virtual-template 1					virtual-template 1
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