Config for cisco 877 using PPOE

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May 12th, 2009
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Does anyone have a config for a Cisco 877 DSL router that is using PPOE?

I normally use PPOA and jsut can't can't this PPOE DSL line working.

For the ATM I am using this:

interface ATM0

no ip address

no ip mroute-cache

no atm ilmi-keepalive

pvc 8/35

encapsulation aal5snap

pppoe-client dial-pool-number 1


dsl operating-mode auto

Dor the Dialer:

interface Dialer1

ip address negotiated

ip access-group inbound in

encapsulation ppp

ip route-cache flow

dialer pool 1

dialer-group 1

no cdp enable

ppp authentication chap pap callin

ppp chap hostname eircom

ppp chap password 0 broadband1

ppp pap sent-username eircom password 0 broadband1

crypto map Crypto_Map

When I do a sh dsl int atm 0 it says showtime and the speed of the line and the CD light is constant.

I turned on debug ppp neg and debug ppp auth and see nothing!

Any ideas?

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Collin Clark Tue, 05/12/2009 - 09:36
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Working Config:

<font size="2"></p><p>interface FastEthernet4</p><p> description OUTSIDE$ETH-WAN$</p><p> no ip address</p><p> no ip redirects</p><p> no ip unreachables</p><p> no ip proxy-arp</p><p> ip route-cache flow</p><p> duplex auto</p><p> speed auto</p><p> pppoe enable group global</p><p> pppoe-client dial-pool-number 1</p><p> no cdp enable</p><p></p><p>interface Dialer0</p><p> description FW_OUTSIDE</p><p> ip address A.B.C.D</p><p> ip access-group outside_access in</p><p> ip mtu 1452</p><p> ip nbar protocol-discovery</p><p> ip nat outside</p><p> ip inspect FIREWALL out</p><p> ip virtual-reassembly</p><p> encapsulation ppp</p><p> ip route-cache flow</p><p> dialer pool 1</p><p> dialer-group 1</p><p> ntp disable</p><p> no cdp enable</p><p> ppp authentication pap callin</p><p> ppp pap sent-username <a href="mailto:[email protected]">[email protected]</a> password 0 SeCrEt</p><p>!</p><p>dialer-list 1 protocol ip permit</p><p></font>

I also have PPPoA if you need it.

jamesgonzo Tue, 05/12/2009 - 11:03
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Should it matter I use and ATM 0 on my Cisco 877 as it looks like your use an ethernet port on an 878 or similar.

Also I've not been asked to add and IP to the dialer like you have below, although I do have a static IP:

ip address A.B.C.D

Collin Clark Wed, 05/13/2009 - 05:14
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jamesgonzo Wed, 05/13/2009 - 05:20
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Thanks, I have never had to add the static Ip to the dialer one port before I leave it as "ip address negotiated" is it import to include this on the dialer0 interface if I'm using PPOE?

Collin Clark Wed, 05/13/2009 - 05:22
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If you're using DHCP use 'ip address negotiated' instead.

jamesgonzo Wed, 05/13/2009 - 05:23
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Is this if our ISP is issing a dynmaic IP address?

Collin Clark Wed, 05/13/2009 - 05:38
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If you have a static IP use-

ip address A.B.C.D

If you have a DHCP address use-

ip address negotiate

The rest of the config is the same.

jamesgonzo Wed, 05/13/2009 - 05:55
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Some of the example configs use:

vpdn enable


vpdn-group 1


protocol pppoe

and under the dialer

dialer remote-name redback

what are these?


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