ISDN BRI backup - Disconnect after 1 sec

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Sep 20th, 2007
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There is a ISDN BRI backup to Serial IF on a router.BRI seems to be able to cennect with opossite site, but after 1 sec comes Disconnect(see attachment).I tried Floating static routes and Dialer watch as well, with the same result. Can anybode help me? Thanks



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Kevin Dorrell Thu, 09/20/2007 - 03:06
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The problem seems to be in this section:


*Sep 20 09:21:29.035: Di0 IPCP: O CONFREQ [Closed] id 1 len 10

*Sep 20 09:21:29.035: Di0 IPCP: Address 10.235.32.5 (0x03060AEB2005)

*Sep 20 09:21:29.035: Di0 PPP: Process pending ncp packets

*Sep 20 09:21:29.035: BR0/1/0:1 PPP: Process pending ncp packets

*Sep 20 09:21:29.035: BR0/1/0:1 PPP: Process pending ncp packets

*Sep 20 09:21:29.047: BR0/1/0:1 LCP: I TERMREQ [Open] id 148 len 4

*Sep 20 09:21:29.047: BR0/1/0:1 LCP: O TERMACK [Open] id 148 len 4

*Sep 20 09:21:29.047: BR0/1/0:1 PPP: Sending Acct Event[Down] id[26]

*Sep 20 09:21:29.047: BR0/1/0:1 PPP: Phase is TERMINATING

*Sep 20 09:21:29.047: Di0 PPP: Sending Acct Event[Down] id[27]

*Sep 20 09:21:29.047: Di0 IPCP: State is Closed



What is the IP address at the other end?


Kevin Dorrell

Luxembourg


richard.turian@... Thu, 09/20/2007 - 03:38
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IP address of Local Dialer0 (calling) is:

10.235.32.5/30

IP address of Remote Dialer0 (called) is:

10.235.32.6/30


smothuku Thu, 09/20/2007 - 04:02
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Hi Richard ,


Please configure ppp chap host name XXXX under dialer 0 on both sides ...


Whenever isdn is disconnecting after sometime it could be problem with authentication configured on routers.


Please check the username and password configured on both ends.If possible configue it once again...


plz paste sh isdn status output .


Thanks,

satish


pciaccio Thu, 09/20/2007 - 04:08
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One thing you can check also is if you are running AAA on both routers. Do you have any AAA statements refering to remote PPP authentication.. Your posting only showed the configs for the interfaces... Can you supply a more comprehensive configuration for review....Thanks...

richard.turian@... Thu, 09/20/2007 - 05:14
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There is no aaa new-model statment on both side.I`ve rewrite user/psw and added ppp chap hostname ... command.

output of isdn status follows:

cpp-poprad#

Sep 20 14:52:00.647: %DIALER-6-BIND: Interface BR0/1/0:1 bound to profile Di0

Sep 20 14:52:00.651: %LINK-3-UPDOWN: Interface BRI0/1/0:1, changed state to up

Sep 20 14:52:00.651: %ISDN-6-CONNECT: Interface BRI0/1/0:1 is now connected to 0524684841 N/A

Sep 20 14:52:01.655: %ISDN-6-CONNECT: Interface BRI0/1/0:1 is now connected to 0524684841 cpp-poprad

Sep 20 14:52:01.655: %ISDN-6-DISCONNECT: Interface BRI0/1/0:1 disconnected from 0524684841 cpp-poprad, call lasted 1 seconds

Sep 20 14:52:01.659: %LINK-3-UPDOWN: Interface BRI0/1/0:1, changed state to down

Sep 20 14:52:01.659: %DIALER-6-UNBIND: Interface BR0/1/0:1 unbound from profile Di0sh isdn statu

Global ISDN Switchtype = basic-net3

ISDN BRI0/1/0 interface

dsl 2, interface ISDN Switchtype = basic-net3

Layer 1 Status:

ACTIVE

Layer 2 Status:

TEI = 71, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED

Layer 3 Status:

0 Active Layer 3 Call(s)

Active dsl 2 CCBs = 0

The Free Channel Mask: 0x80000003

Total Allocated ISDN CCBs = 0

cpp-poprad#sh isdn act

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

ISDN ACTIVE CALLS

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

Call Calling Called Remote Seconds Seconds Seconds Charges

Type Number Number Name Used Left Idle Units/Currency

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

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


cpp-poprad#

Sep 20 14:52:18.295: %LINK-3-UPDOWN: Interface BRI0/1/0:1, changed state to up

Sep 20 14:52:18.295: %DIALER-6-BIND: Interface BR0/1/0:1 bound to profile Di0

Sep 20 14:52:18.299: %ISDN-6-CONNECT: Interface BRI0/1/0:1 is now connected to 05246848411 N/A

Sep 20 14:52:18.351: %ISDN-6-CONNECT: Interface BRI0/1/0:1 is now connected to 05246848411 cpp-poprad

Sep 20 14:52:18.531: %LINK-3-UPDOWN: Interface BRI0/1/0:1, changed state to down

Sep 20 14:52:18.531: %DIALER-6-UNBIND: Interface BR0/1/0:1 unbound from profile Di0sh isdn act


pciaccio Thu, 09/20/2007 - 06:19
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This is kind of a stupid question, but I see that your ISDN switch type is Basic-Net3. I have seen in the past that the wrong switch type has been inputted and the call actually goes out but does not stay up. Can you re-verify that your switch type is correct. Just something to check....Thanks...

richard.turian@... Thu, 09/20/2007 - 21:55
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The ISDN switch type is net3 on both sides as configured. Simultaneously i`ve configured second backup link on another pair of routers, one side net3, oposite side net5 - and it start working immediately. So the problem is maybe IOS version.

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