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Community Member

Problem with ISDN backup

Hi,

Cisco 1721 Router

IOS: c1700-ipbasek9-mz.124-5a.bin

Config:

interface Dialer0

no description

ip address 192.168.225.238 255.255.255.252

no ip redirects

no ip unreachables

no ip proxy-arp

encapsulation ppp

no ip split-horizon

dialer pool 1

dialer remote-name cr1

dialer idle-timeout 180

dialer string <number removed>

dialer-group 1

fair-queue

no cdp enable

ppp authentication pap callin

ppp chap refuse

ppp pap sent-username <removed>

password 7 <removed>

ppp multilink bap

ppp multilink links maximum 2

ppp multilink links minimum 2

ppp multilink endpoint string client-backup

end

interface BRI0

description 6750

no ip address

no ip redirects

no ip unreachables

no ip proxy-arp

encapsulation ppp

dialer pool-member 1

isdn switch-type basic-net3

isdn point-to-point-setup

isdn calling-number 6750

fair-queue

ppp authentication chap pap

ppp multilink

end

----------------------

sh debu

The following ISDN debugs are enabled on all DSLs:

debug isdn error is ON.

debug isdn event is ON.

debug isdn silent errors is ON.

isd test call int br0 <number removed>

client-cr1#

001122: Dec 11 20:59:00.634 SAST: ISDN BR0 EVENT: UserIdle: callid 0x803C received ISDN_CALL (0x0)

001123: Dec 11 20:59:00.638 SAST: ISDN BR0 SERROR: isdn_get_guid: Cannot allocate a GUID (5)

001124: Dec 11 20:59:00.638 SAST: ISDN BR0 EVENT: process_bri_call: call id 0x803C, called_number <removed>, Guid 006243AC8262 speed 64, call type DATA, bchan -1 clng_num none

001125: Dec 11 20:59:00.638 SAST: ISDN BR0 SERROR: isdn_get_display_text_from_gtd: false ret

001126: Dec 11 20:59:00.638 SAST: ISDN BR0 SERROR: isdn_get_mlpp_from_gtd: MLPP from GTD failed

001127: Dec 11 20:59:00.666 SAST: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0, TEI 89 changed to up

001128: Dec 11 20:59:00.826 SAST: ISDN BR0 EVENT: process_rxstate: ces/callid 1/0x803C calltype 1 HOST_INFORMATION

001129: Dec 11 20:59:02.542 SAST: ISDN BR0 EVENT: process_rxstate: ces/callid 1/0x803C calltype 1 HOST_PROCEEDING

001130: Dec 11 20:59:02.710 SAST: ISDN BR0 EVENT: process_rxstate: ces/callid 1/0x803C calltype 1 HOST_ALERTING

001131: Dec 11 20:59:02.734 SAST: ISDN BR0 EVENT: process_rxstate: ces/callid 1/0x803C calltype 1 HOST_CONNECT

001132: Dec 11 20:59:02.734 SAST: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up

001133: Dec 11 20:59:02.734 SAST: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 00216572700 N/A

001134: Dec 11 20:59:03.550 SAST: ISDN BR0 EVENT: process_rxstate: ces/callid 1/0x803C calltype 1 HOST_DISCONNECT

001135: Dec 11 20:59:03.550 SAST: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down

001136: Dec 11 20:59:03.602 SAST: ISDN BR0 EVENT: process_rxstate: ces/callid 1/0x803C calltype 1 HOST_DISCONNECT_ACK

001137: Dec 11 20:59:05.534 SAST: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0, TEI 89 changed to down

What's wrong with this picture? The config looks correct to me but the darn thing wont dial.

Ideas anyone?

thanks

5 REPLIES
Blue

Re: Problem with ISDN backup

It looks like it is connecting, but dropping immediately.

001133: Dec 11 20:59:02.734 SAST: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 00216572700

Perhaps an authentication problem? debug ppp authentication

Please rate helpful posts.

Hall of Fame Super Gold

Re: Problem with ISDN backup

Another thought is that the original post shows dialer-group 1 but does not show dialer-list 1. It would help to know if dialer-list is configured and if so what it has.

HTH

Rick

Community Member

Re: Problem with ISDN backup

rick,

dialer list is configured.

dialer-list 1 protocol ip permit

Community Member

Re: Problem with ISDN backup

ok ... get auth failure but username and passowrd is correct on both client router and the one they dial into.

What else can it be?

Community Member

Re: Problem with ISDN backup

check out the multilink string used on either sides.

It would help if debug q931 and q921 outputs are taken.

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