From: Kevin Dailey (kldailey@xxxxxxxxxxxxxxxxx)
Date: Fri Feb 23 2001 - 21:43:09 GMT-3
Send the configs of all the routers. From R1(headquarters) send debug ppp
negotiation, debug ppp authentication, debug isdn q921, and debug isdn q931.
Kevin
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
zhe shao
Sent: Friday, February 23, 2001 2:11 PM
To: ccielab@groupstudy.com
Subject: ISDN problem need help
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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