Re: Setting up DSL connections on a 3640 w/ ATM

e.network · ‎10-26-2001

We are reselling the LEC's DSL service in our area. We connect to the LEC via a ATM T3 interface. I'm looking for a solution that will let me use PPPoE for authentication for my dynamic IP customers. I found scattered information on the cisco website, but I havent found anything that matches my scenario.

Does anybody have any examples that they could share with me? Right now I have 6 VC-Class statement, 1 BVI Statement, and seperate 6 sub-interfaces setup for each class of DSL service that we offer.

I'm unclear on how to make customers authenticate via PPPoE against my RADIUS server. I've never setup a IP pool on a 3640 before but I have a good idea on how to do it. I just dont understand how the router knows who to assign the IP's to after authentication via PPPoE against the radius server. Somebody please help.

Marc

ciscomoderator · ‎11-04-2001

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you, or there is no public information available at this time. If you don't get a suitable response to your post, you may wish to review our resources at the online http://www.cisco.com/go/solutions. You may also contact our product information line at 1-800-553-NETS or a Cisco Systems Engineer at your local Cisco office or reseller. To locate your local Cisco representative, visit http://www.cisco.com/warp/public/687/Directory.shtml

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.

alanssie · ‎11-05-2001

Marc,

PPPoe would need a bridge enviroment, don't know currently

if this is configure in your router.

If one of the sub-interface is receiving snap packet with PPPoe header the IOS will see this and submit the incoming

PPP packet to a virtual-access, of course if the PPPoE

was establish previously.

PPPoe configuration require vpdn as well as a target

virtual-template.

This work almost the same way than l2tp except of course that

PPPoe use message like PADI, PADO, PADS,...

Once PPPoE has establish the session the PPP code takes

over, hence the ip address allocated to a remote PC would

be as if you were doing this via l2tp.

First you authenticated (local, or radius) then you discuss IPCP, if the pool as well as the virtual-template is configured

properly, when the PC start negotiating the address, it will send a confreg with 0.0.0.0. seeing this the PPP code will try

to get the ip address following configuration on the virtual-template (this could even be from a dhcp server)

Hope this helps

Alain

cwetzler · ‎11-05-2001

Marc,

I am trying to use more than one ip pool and also do not have static adressing ready yet...that's my question. Maybe we can help each other. Here's my working config (relevant) on a 3620 on an ATM T1. My customers use PPPoE as well. Would you mind emailing me your config to cwetzler@wetzweb.com? Thanks in advance.

Current configuration : 2944 bytes

!

version 12.1

no service single-slot-reload-enable

service timestamps debug uptime

service timestamps log uptime

service password-encryption

!

hostname xxxxxxx

!

logging rate-limit console 10 except errors

aaa new-model

!

username dslcust1@domain.net password 7 xxxxxxxxxxx

username dslcust2@domain.net password 7 xxxxxxxxxxx username dslcust2@domain.net password 7 xxxxxxxxxxx ip subnet-zero

!

no ip finger

no ip domain-lookup

ip domain-name domain.com

ip name-server xx.xx.xx.xx

!

vpdn enable

no vpdn logging

!

vpdn-group 1

accept-dialin

protocol l2tp

virtual-template 1

terminate-from hostname xxxxxxxx

local name xxxx

lcp renegotiation always

l2tp tunnel password 7 xxxxxxxx

!

call rsvp-sync

!

interface FastEthernet0/0

ip address xx.xx.xx.xx 255.255.255.192 secondary

ip address yy.yy.yy.yy 255.255.255.0

duplex auto

speed auto

!

interface Serial0/0

no ip address

shutdown

clockrate 2000000

!

interface ATM1/0

no ip address

no ip mroute-cache

atm vc-per-vp 4096

no atm ilmi-keepalive

atm ilmi-pvc-discovery

no scrambling-payload

!

interface ATM1/0.1 point-to-point

ip address xx.xx.xx.xx 255.255.255.252

no ip mroute-cache

pvc x/xxx

encapsulation aal5snap

!

interface Virtual-Template1

mtu 1492

ip unnumbered FastEthernet0/0

peer default ip address pool dslpool1

ppp authentication chap

!

ip local pool dslpool1 xx.xx.xx.xx xx.xx.xx.xx

ip default-gateway zz.zz.zz.zz

ip classless

!

dial-peer cor custom

!

end

alanssie · ‎11-06-2001

Marc,

Useally I configure pppoe as in the following url

http://www.cisco.com/warp/customer/794/827pppoe_2.html

If you question was to associate pool1 for l2tp and pool 2 for pppoe this should work just fine by configuring different virtual-template.

I am a bit confused by the config you posted, I see l2tp

as protocol in the vpdn config.

Could you please answer if you are trying to get specific

address to PPPoe users, or if you want to different pools

for l2tp and PPPoe

Alain