06-17-2006 04:45 AM
I have a router connected to the remote ISDN router via ISDN BRI line
But, the ISDN failed to establish the ip connection. I have the following error message, when I issue the "isdn test call int bri2/5 <number>
Jun 17 12:23:41.990: ISDN BR2/5 EVENT: UserIdle: callid 0x9E56 received ISDN_CALL (0x0)
Jun 17 12:23:49.990: ISDN BR2/5 EVENT: process_rxstate: ces/callid 1/0x9E56 calltype 1 HOST_DISCONNECT_ACK
Jun 17 12:23:49.990: ISDN BR2/5 **ERROR**: host_disconnect_ack: Unfound B-channel on Disconnect_Ack call id 0x9E56
Jun 17 12:24:11.988: ISDN BR2/5 EVENT: UserIdle: callid 0x9E56 received ISDN_HANGUP (0x1)
Jun 17 12:24:11.988: ISDN BR2/5 **ERROR**: CCBRI_Go: NO CCB Src->HOST call id 0x9E56, event 0x5 ces 1
Jun 17 12:24:11.988: ISDN BR2/5 EVENT: process_rxstate: ces/callid 1/0x9E56 calltype 1 HOST_QUERY_RESPONSE
Jun 17 12:39:51.836: ISDN BR2/5 **ERROR**: host_disconnect_ack: Unfound B-channel on Disconnect_Ack call id 0x9E57
Jun 17 12:40:13.837: ISDN BR2/5 **ERROR**: CCBRI_Go: NO CCB Src->HOST call id 0x9E57, event 0x5 ces 1
06-17-2006 07:42 AM
Hello,
can you post the configs of both routers ?
Regards,
GNT
06-17-2006 07:51 AM
Router 1
________
interface BRI2/5
bandwidth 64
ip address 203.1.1.1 255.255.255.252
encapsulation ppp
dialer idle-timeout 180
dialer map ip 203.1.1.2 name CHNDGMP001 018503654
dialer-group 1
isdn switch-type basic-net3
isdn point-to-point-setup
isdn caller 018503654
no cdp enable
ppp authentication chap
ppp chap hostname CHBARMP001
Router 2
________
interface BRI0
description NDGBARL01-1;LINK TO CHBARMP003 B2/5
ip address 203.1.1.2 255.255.255.252
encapsulation ppp
dialer idle-timeout 180
dialer map ip 203.1.1.1 name CHBARMP001
dialer-group 1
isdn switch-type basic-net3
isdn caller 0417630020
ppp authentication chap
06-17-2006 08:09 AM
Router 1
________
interface BRI2/5
bandwidth 64
ip address 203.1.1.1 255.255.255.252
encapsulation ppp
dialer idle-timeout 180
dialer map ip 203.1.1.2 name CHNDGMP001 018503654
dialer-group 1
isdn switch-type basic-net3
isdn point-to-point-setup
isdn caller 018503654
no cdp enable
ppp authentication chap
ppp chap hostname CHBARMP001
Router 2
________
interface BRI0
description NDGBARL01-1;LINK TO CHBARMP003 B2/5
ip address 203.1.1.2 255.255.255.252
encapsulation ppp
dialer idle-timeout 180
dialer map ip 203.1.1.1 name CHBARMP001
dialer-group 1
isdn switch-type basic-net3
isdn caller 0417630020
ppp authentication chap
06-17-2006 08:58 AM
Chris
I am not sure what caused the error. Would you post the output of show isdn status? It might also be helpful if your would run debug isdn q931, try the test again, and post any output produced by debug.
HTH
Rick
06-17-2006 09:03 AM
The output for show isdn sta bri2/5
ISDN BRI2/5 interface
dsl 21, interface ISDN Switchtype = basic-net3
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 76, Ces = 1, SAPI = 0, State = TEI_ASSIGNED
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 21 CCBs = 0
The Free Channel Mask: 0x80000003
Total Allocated ISDN CCBs = 0
06-17-2006 12:27 PM
Hello,
make sure that you do not disconnect your sessions with the 'clear interface' command, but use the 'isdn test disconnect' instead, since 'clear interface' causes certain ISDN switches to not properly disconnect sessions.
Also, with your current config, only your Router 1 can call your Router 2, is this what you want ?
Make sure that your the CHAP hostnames match on both sides (they are case sensitive).
Try and modify your config as following:
Router 1
________
interface BRI2/5
bandwidth 64
ip address 203.1.1.1 255.255.255.252
encapsulation ppp
dialer idle-timeout 180
--> dialer map ip 203.1.1.2 name CHNDGMP001 broadcast 018503654
dialer-group 1
isdn switch-type basic-net3
isdn point-to-point-setup
isdn caller 018503654
no cdp enable
ppp authentication chap
ppp chap hostname CHBARMP001
Router 2
________
interface BRI0
description NDGBARL01-1;LINK TO CHBARMP003 B2/5
ip address 203.1.1.2 255.255.255.252
encapsulation ppp
dialer idle-timeout 180
dialer map ip 203.1.1.1 name CHBARMP001
dialer-group 1
isdn switch-type basic-net3
isdn caller 0417630020
ppp authentication chap
Regards,
GNT
06-17-2006 04:34 PM
Chris
Thanks for posting the output of show isdn status. The output looks normal and seems to show a connection ready to work.
Is the ISDN the primary connection to the other router or is the ISDN perhaps a backup connection? (If some interface is configured with backup interface bri2/5 then that puts the BRI interface into a state where it can not initiate a call unless the primary link is not available)
Given what you have shown us I believe that the output of debug isdn q931 would be quite helpful.
HTH
Rick
06-17-2006 11:11 PM
Hello Chris,
just one more thought: what country are you in ? Some providers still have older type ISDN switches in use that support only 56K speed connections. Try and add the following to your config:
dialer map ip 203.1.1.2 name CHNDGMP001 speed 56 broadcast 018503654
Regards,
GNT
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