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Can  router 2500 be configured for DSL that requires authentication?

cyberbud21 asked
Medium Priority
Last Modified: 2012-06-22
I want to replace my linksys router with a cisco 2500 series with 2 aui ports.  The aDSL modem will connect to the 2500  directly via ethernet cable.  currently on the Linksys I am required to put my ADSL account info in order to have a connection to my ISP.  How can I configure the 2500 to authenticate to my isp and pull a ip address from the ISP?.
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I looked through the feature index on cisco's site, and none of the IOS there for the 2500 series support PPPOE.

If the modem does not have an internal router/w pppoe support, that linksys is one easy way.

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Top Expert 2005

I beleive your modem and ISP using PPPoE, you need to connect 2500 with AUI transciever to the modem with ethernet cable and configure 2500 for PPPoE dial, please see sample config below. Make sure you have right interface numbers.
Also, check if you 2500 IOS supports PPPoE.

ip subnet-zero
no ip cef
vpdn enable
vpdn-group 1
  protocol pppoe
no ftp-server write-enable
interface Ethernet0
 no ip address
 ip nat outside
 ip tcp adjust-mss 1452
 no shutdown
 pppoe enable
 pppoe-client dial-pool-number 1
 no cdp enable
interface Ethernet1
 description Internes Lan
 ip address
 ip nat inside
interface Dialer1
 ip address negotiated
 ip mtu 1492
 ip nat outside
 encapsulation ppp
 ip route-cache flow
 ip tcp adjust-mss 1452
 no ip mroute-cache
 dialer pool 1
 dialer-group 1
 no cdp enable
 ppp authentication pap callin
 ppp pap sent-username <YOUR USERNAME HERE> password <YOUR PASSWORD HERE>
ip classless
ip route Dialer1
no ip http server
ip nat inside source list 1 interface Dialer1 overload
access-list 1 permit any
access-list 1 permit
dialer-list 1 protocol ip permit
Top Expert 2005


I checked Cisco Feature Navigator and it says - no PPPOE support for 2500 platform, alas. Please ignore my previous message...You shold go with 1700 series (1720) with WIC-1-ENET module. I posted configuration from my 1720 at home...
Top Expert 2005

Craig 200X - just mentioned your message...you completely right!
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