Re: Trouble configuring PPPoE client (external modem)

DHunter123 · ‎05-16-2013

Hi All, I've struggled now for a couple of days to setup a PPPoe connection on our cisco 887va box. I can setup straight away on a draytek box so i know the connection is good.

I can't get the line protocol to come up? It's connected via ethernet port 0 to an external modem. One thing i can't figure out is if ethernet 0 and fast ethernet 0 is the same physical port? (I have very little cisco knowledge as you can probably guess). I've attached the running-config below. Any advice would be greatly appreciated. thanks

Building configuration...

Current configuration : 3738 bytes
!
! Last configuration change at 16:16:56 UTC Thu May 16 2013
version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname **!
boot-start-marker
boot-end-marker
!
!
no logging buffered
no logging console
enable secret *************

enable password ***********
!
no aaa new-model
memory-size iomem 10
!
crypto pki trustpoint TP-self-signed-15463827
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-15463827
revocation-check none
rsakeypair TP-self-signed-15463827
!
!
crypto pki certificate chain TP-self-signed-15463827
certificate self-signed 01
****
quit
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
license udi pid ***************!
!
username ************** privilege 15 password 0 *****************!
!
!
!
!
controller VDSL 0
operating mode vdsl2
!
csdb tcp synwait-time 30
csdb tcp idle-time 3600
csdb tcp finwait-time 5
csdb tcp reassembly max-memory 1024
csdb tcp reassembly max-queue-length 16
csdb udp idle-time 30
csdb icmp idle-time 10
csdb session max-session 65535
!
!
!
!
!
!
!
!
!
interface Ethernet0
description $ETH-WAN$
no ip address
no ip redirects
no ip proxy-arp
pppoe enable group global
pppoe-client dial-pool-number 1
!
interface ATM0
no ip address
shutdown
no atm ilmi-keepalive
!
interface FastEthernet0
no ip address
!
interface FastEthernet1
no ip address
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
no ip address
!
interface Vlan1
ip address 10.10.10.254 255.255.255.0
ip nat inside
ip virtual-reassembly in
ip tcp adjust-mss 1412
!
interface Dialer0
ip address negotiated
ip mtu 1452
ip nat outside
ip virtual-reassembly in
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap pap callin
ppp chap hostname*************
ppp chap password 0 *************

ppp pap sent-username*************** password 0 *****************!
ip forward-protocol nd
ip http server
ip http authentication local
ip http secure-server
!
ip nat inside source list 1 interface Dialer0 overload
ip route 0.0.0.0 0.0.0.0 Dialer0
!
access-list 1 remark INSIDE_IF=Vlan1
access-list 1 remark CCP_ACL Category=2
access-list 1 permit 10.10.10.0 0.0.0.255
dialer-list 1 protocol ip permit
!
snmp-server community public RO
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
privilege level 15
password ********************
login local
transport input telnet ssh
!
!
end

kmccourt · ‎05-16-2013

Your router has a VDSL controller which can be used to connect directly to an ADSL (interface ATM0) or VDSL (interface Ethernet0) service. Is there any reason why you cannot use this instead of the external modem?

However, as you seem to be using an external modem, and not the internal 'modem', controller VDSL0 and interface Ethernet0 can be shutdown. Ethernet0 therefore has no role when connecting to an external modem.

The problem is that I don't think your router has another WAN port apart from the VDSL controller. FastEthernet 0-3 are switch ports and your connection will need to be configured via these ports and the VLAN interface. I have never tried this configuration myself but have seen it described for a Cisco 877 with external modem.

DHunter123 · ‎05-16-2013

Thanks for cleaing the Etherner0 thing up for me. the Cisco IOS lists the ethernet0 connection as well as fastethernet0, i assumed they must share a physical port and that the LAN port might operate as a WAN port if configured correctly.

there's no reason why i'm using an external modem in fact i have also attempted to get it to work over ATM0 (and failed) I just assumed it may be an easier process to use the external modem given i've had no success so far. I'll try over ATM0 again tomorrow, and post the running config. I appreciate your time.

Just FYI our broadband connection is a FTTC service

kmccourt · ‎05-16-2013

If you want to use the external modem see if this link helps -

http://www.dslreports.com/forum/remark,24720497?hilite=bt+fttc+vdsl. This concerns a Cisco 877, which is an older model, but similar to yours in that the WAN port is ADSL and the remaining ports are switch ports.

However if it's possible to use the 887VA as it was intended I would do it that way. Perhaps if you told us who your ISP was someone could help with mode specific information. For example, in the UK, FTTC is a VDSL2 service and will be configured using Ethernet0 and not ATM0 - see http://www.null0.co.uk/2012/05/fttc-cisco-vdsl-router/ for an example.

DHunter123 · ‎05-17-2013

Thanks our provider is Zen Internet http://www.zen.co.uk/.

I'll definitely retry this using the ATM0 interface and post the running configuration soon. I'l Give it a shot using the link you provided.

thanks again

kmccourt · ‎05-17-2013

PLEASE DO NOT USE ATM0

Zen uses VDSL2 and is configured as per the link above using Ethernet0 tagged with VLAN 101. I've done it before, I use Zen as my ISP. There are examples out there for this configuration with Cisco routers - it is standard for BT Infinity, Zen etc.

I'm away from the office at the moment so don't have access to a working config.

Sent from Cisco Technical Support iPhone App

DHunter123 · ‎05-17-2013

Thanks for your help, this is gonna sound stupid but is ethernet0 the same physical interface at the fastEthernet0 port on the LAN switch?

kmccourt · ‎05-17-2013

No, you need to connect to the BT wall socket with an RJ11 cable from the WAN/xDSL port on the router (I can't remember exactly how it's labelled).

Sent from Cisco Technical Support iPhone App

DHunter123 · ‎05-17-2013

Hi, I think it must almost be working as the PPP light is now Solid on the router, however I still cannot ping any external IP addresses? I think maybe it's now a LAN issue? Can you see anything unusual in the running-config?

Building configuration...

Current configuration : 3416 bytes
!
! Last configuration change at 09:48:36 UTC Fri May 17 2013 by hunterd
version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname BH-Main
!
boot-start-marker
boot-end-marker
!
!
no logging buffered
no logging console
enable secret 5 ******
enable password *****
!
no aaa new-model
memory-size iomem 10
!
crypto pki trustpoint TP-self-signed-15463827
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-15463827
revocation-check none
rsakeypair TP-self-signed-15463827
!
!
crypto pki certificate chain TP-self-signed-15463827
certificate self-signed 01
********
quit
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
license udi pid CISCO887VA-K9 sn FCZ171294ED
!
!
username ****** privilege 15 password 0 *****
!
!
!
!
!
controller VDSL 0
!
csdb tcp synwait-time 30
csdb tcp idle-time 3600
csdb tcp finwait-time 5
csdb tcp reassembly max-memory 1024
csdb tcp reassembly max-queue-length 16
csdb udp idle-time 30
csdb icmp idle-time 10
csdb session max-session 65535
!
!
!
!
!
!
!
!
!
interface Ethernet0
no ip address
!
interface Ethernet0.101
encapsulation dot1Q 101
pppoe enable
pppoe-client dial-pool-number 1
!
interface ATM0
no ip address
shutdown
no atm ilmi-keepalive
!
interface FastEthernet0
no ip address
!
interface FastEthernet1
no ip address
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
no ip address
!
interface Vlan1
ip address 10.10.10.254 255.255.255.0
ip nat inside
ip virtual-reassembly in
!
interface Dialer0
ip address negotiated
ip nat outside
ip virtual-reassembly in
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap callin
ppp chap hostname ********
ppp chap password 0 *******
ppp ipcp dns request
ppp ipcp route default
!
ip forward-protocol nd
ip http server
ip http authentication local
ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 Dialer0
!
!
snmp-server community public RO
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
password ******
login
transport input all
!
!
end

DHunter123 · ‎05-17-2013

Nevermind i've got it going, I clearly messed the NAT config up. Thanks again for all your help.

Cheers mate

kmccourt · ‎05-17-2013

Well done on getting it sorted.