From: Nigel Taylor (nigel_taylor@xxxxxxxxxxx)
Date: Fri Feb 23 2001 - 23:57:15 GMT-3
shao,
Without the configs I'm only guessing but this does sound like a problem
with authentication. Also it sounds like your fast-idle timeout might be
set too low. first try looking at the output of the "debug ppp nego" and
"debug isdn q931" this should reveal the problem.
HTH
Nigel
>From: zhe shao <zshao123@yahoo.ca>
>Reply-To: zhe shao <zshao123@yahoo.ca>
>To: ccielab@groupstudy.com
>Subject: ISDN problem need help
>Date: Fri, 23 Feb 2001 17:10:45 -0500 (EST)
>
>Hi all,
>
>I got a very simple ISDN senario,
>
> R1(headoffice)
> / \
> R2 R3
>
>R1 is 2600 router with 4 bri interfaces, R2 and R3
>are 800 routers,each with one bri.
>Using ISDN, I connect two branches R2 R3 to R1.
> Routing all using static.
>I used dialer ip map, not dialer string, on all the
>routers, and encap ppp, ppp chap.
>
>When I ping from one branch to R1, it will bring up
>the
>ISDN B channel, and I can ping through, all good.
>
>But if I ping from headoffice R1 to one branch,
>it will not bring up the ISDN B channel, and cannot
>ping through.At that time I debug dialer events and
>debug dialer packets, I can see that R1 is dialing to
>the branch, and the B channel is up, but after 5
>seconds, it shows " ISDN carrier timeout ", and
>calling party R1 is send ISDN disconnect. So I cannot
>ping from head to Branch.
>That time I also turn on debug ip packet, showing
>routing is good, but encapsulation failed.
>
>Can anyone help me out!!!
>
>Thanks a lot
>
>Jimmy
>
>
>
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