From: Ng, Kim Seng David (David) (ksng@xxxxxxxxx)
Date: Tue May 21 2002 - 22:41:50 GMT-3
Hi group,
I am facing something in ISDN which I have not encountered before. Each time I
ping the far end ISDN interface IP address, the second B channel will be set up
by the remote router to send the echo-reply back to the originator of the ping
. I do not have load-threshold or ppp multilink configured in either routers bu
t I have setup ppp authentication chap and dialer maps. The switch-type used is
basic-ni1 and it has spid1 and spid2 configured. The ISDN switch simulator doe
s not send calling number IE. The routers are IOS 12.1. Below is the BRI interf
ace configuration on both routers:
interface BRI0
ip address 196.1.1.2 255.255.255.0
encapsulation ppp
dialer map ip 196.1.1.1 name R5 broadcast 8358661
dialer-group 1
isdn switch-type basic-ni
isdn spid1 0835866201
isdn spid2 0835866401
ppp authentication chap
interface BRI0
ip address 196.1.1.1 255.255.255.0
encapsulation ppp
dialer map ip 196.1.1.2 name R6 broadcast 8358662
dialer-group 1
isdn switch-type basic-ni
isdn spid1 0835866101
isdn spid2 0835866301
isdn calling-number 8358661
ppp authentication chap
Prevoiusly, I used to work with ISDN switch-type basic-net3 without spids. This
switch does send calling number IE and the pinging uses only one B-channel.
>From the above, I deduce that the router uses the calling number to determine
whether to set up the second B-channel to echo-reply. Below is the BRI interfac
e of both routers.
Just need someone to verify.
Thanks
David
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