ADSL VPN with 1841

[wpalumbo06]

Hello,

Is it possible to configure the Cisco 1841 for VPN connectivity (via an ADSL) modem without the ADSL WIC card?

Thanks,

Bill..

[paolo bevilacqua]

Yes, VPN is independent from the media used.

However, I recommend you get an HWIC-1ADSL card, because using the external modem often presents issues that complicate things further.

Please rate post if it helps!

[wpalumbo06]

I think I've just about got it figured out except for the following error:

Interface Virtual-Access1, changed state to down

This keeps changing between up and down...any thoughts on how to fix this would be appreciated.

[a.alekseev · Accepted solution]

debug ppp neg

debug ppp authe

[wpalumbo06]

Looks to me like an authentication issue between the router and DSL modem. Here are the debug outputs;

Jul 9 23:56:17: %DIALER-6-BIND: Interface Vi1 bound to profile Di0

*Jul 9 23:56:17: Vi1 PPP: Phase is DOWN, Setup

*Jul 9 23:56:17: Vi1 PPP: Using dialer call direction

*Jul 9 23:56:17: Vi1 PPP: Treating connection as a callout

*Jul 9 23:56:17: Vi1 PPP: Phase is ESTABLISHING, Active Open

*Jul 9 23:56:17: Vi1 PPP: No remote authentication for call-out

*Jul 9 23:56:17: Vi1 LCP: O CONFREQ [Closed] id 1 len 10

*Jul 9 23:56:17: Vi1 LCP: MagicNumber 0x1AAFD54E (0x05061AAFD54E)

*Jul 9 23:56:17: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to up

*Jul 9 23:56:17: Vi1 LCP: I CONFREQ [REQsent] id 131 len 19

*Jul 9 23:56:17: Vi1 LCP: MagicNumber 0x67404D7D (0x050667404D7D)

*Jul 9 23:56:17: Vi1 LCP: MRU 1500 (0x010405DC)

*Jul 9 23:56:17: Vi1 LCP: AuthProto CHAP (0x0305C22305)

*Jul 9 23:56:17: Vi1 LCP: O CONFACK [REQsent] id 131 len 19

*Jul 9 23:56:17: Vi1 LCP: MagicNumber 0x67404D7D (0x050667404D7D)

*Jul 9 23:56:17: Vi1 LCP: MRU 1500 (0x010405DC)

*Jul 9 23:56:17: Vi1 LCP: AuthProto CHAP (0x0305C22305)

*Jul 9 23:56:17: Vi1 LCP: I CONFACK [ACKsent] id 1 len 10

*Jul 9 23:56:17: Vi1 LCP: MagicNumber 0x1AAFD54E (0x05061AAFD54E)

*Jul 9 23:56:17: Vi1 LCP: State is Open

*Jul 9 23:56:17: Vi1 PPP: Phase is AUTHENTICATING, by the peer

*Jul 9 23:56:17: Vi1 CHAP: I CHALLENGE id 1 len 32 from "glptmsts73w"

*Jul 9 23:56:17: Vi1 CHAP: Unable to authenticate for peer

*Jul 9 23:56:17: Vi1 PPP: Sending Acct Event[Down] id[5]

*Jul 9 23:56:17: Vi1 PPP: Phase is TERMINATING

*Jul 9 23:56:17: Vi1 LCP: O TERMREQ [Open] id 2 len 4

*Jul 9 23:56:17: Vi1 LCP: I TERMACK [TERMsent] id 2 len 4

*Jul 9 23:56:17: Vi1 LCP: State is Closed

*Jul 9 23:56:17: Vi1 PPP: Phase is DOWN

*Jul 9 23:58:24: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

*Jul 9 23:58:35: %DIALER-6-BIND: Interface Vi1 bound to profile Di0

*Jul 9 23:58:35: Vi1 PPP: Using dialer call direction

*Jul 9 23:58:35: Vi1 PPP: Treating connection as a callout

*Jul 9 23:58:35: Vi1 PPP: Authorization required

*Jul 9 23:58:35: Vi1 PPP: No remote authentication for call-out

*Jul 9 23:58:35: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to up

*Jul 9 23:58:35: Vi1 PPP: No authorization without authentication

*Jul 9 23:58:35: Vi1 CHAP: I CHALLENGE id 1 len 32 from "glptmsts73w"

*Jul 9 23:58:35: Vi1 CHAP: Unable to authenticate for peer

*Jul 9 23:58:35: %DIALER-6-UNBIND: Interface Vi1 unbound from profile Di0

*Jul 9 23:58:35: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to down

[purohit_810]

Can you check authentication part?

Unable to authenticate for peer

*Jul 9 23:56:17: Vi1 PPP: Sending Acct Event[Down] id[5]

- Dharmesh Purohit

[wpalumbo06]

Thanks for the help...the debug ppp authe output gave me the hint I needed to figure out what was wrong. It is working just fine.

[a.alekseev]

Nice to hear :)

[Pls RATE if HELPS]