10-01-2002 06:50 PM - edited 03-02-2019 01:46 AM
I have a strange problem here, and I'd like to get an opinion on what might be the problem. Basically, I have two routers, a 2600 and a 3600, connected to each other using frame relay with ISDN as a backup. This config was setup by my predecessor, and as such looks like it may have once worked (but no one can assure me of this)... in recent times, we've had flaky line issues with the frame relay, and noticed that the ISDN line would dial from the 2600, connect to the 3600, and terminate after 2 seconds. This would repeat ad nauseum until the frame relay line came back up.
I'd like to get a resolution to this problem, and I'm not sure what is going wrong. After reading through many posts in this forum, I was unable to find a similar issue, but maybe I was looking hard not smart!
Here's the configs from both routers and the output of some debug commands. I'd be grateful for any suggestions as to how to fix this.
3600 router relevant config-
------------------------------------
version 12.2
hostname Kenny
username gw-c2621-1 password 7 XXXXXXXXXX
isdn switch-type basic-ni
call rsvp-sync
!
interface BRI2/0
description ISDN link
ip address 192.168.1.1 255.255.255.252
encapsulation ppp
dialer idle-timeout 300
dialer load-threshold 200 either
dialer-group 1
isdn switch-type basic-ni
no cdp enable
ppp authentication chap
ppp multilink
ppp multilink interleave
2600 router relevant config-
------------------------------------
version 12.2
hostname Kyle
username sj-c3662-1 password 7 XXXXXXXXX
isdn switch-type basic-ni
call rsvp-sync
!
interface BRI0/0
ip address 192.168.1.2 255.255.255.252
encapsulation ppp
dialer idle-timeout 300
dialer map ip 192.168.1.1 broadcast 18005551212
dialer load-threshold 200 either
dialer-group 1
isdn switch-type basic-ni
no cdp enable
ppp authentication chap
ppp multilink
ppp multilink interleave
!
access-list 101 deny ospf any any
access-list 101 permit ip any any
dialer-list 1 protocol ip list 101
There is more to the config on the frame relay interface and such, but irrelevant to this config, unless someone disagrees...
And here are the debug command outputs from the 3600 side when I initiate a manual call from the 2600:
2600:
--------
Kyle#isdn test call interface brI 0/0 14084339642 speed 56
3600:
--------
Kenny#debug isdn q931
ISDN Q931 packets debugging is on
Kenny#debug dialer
Dial on demand events debugging is on
Kenny#debug ppp negotiation
PPP protocol negotiation debugging is on
Kenny#debug ppp authentication
PPP authentication debugging is on
ISDN BR2/0: RX <- SETUP pd = 8 callref = 0x4C
Bearer Capability i = 0x8890218F
Channel ID i = 0x89
Signal i = 0x40 - Alerting on - pattern 0
Called Party Number i = 0xC1, '5551212', Plan:ISDN,Type:Subscriber(local)
ISDN BR2/0: Event: Received a DATA call from <unknown> on B1 at 56 Kb/s
ISDN BR2/0: Event: Accepting the call id 0xA90
%LINK-3-UPDOWN: Interface BRI2/0:1, changed state to up
BR2/0:1 PPP: Treating connection as a callin
BR2/0:1 PPP: Phase is ESTABLISHING, Passive Open [0 sess, 1 load]
BR2/0:1 LCP: State is Listen
ISDN BR2/0: TX -> CALL_PROC pd = 8 callref = 0xCC
Channel ID i = 0x89
ISDN BR2/0: TX -> CONNECT pd = 8 callref = 0xCC
Channel ID i = 0x89
ISDN BR2/0: RX <- CONNECT_ACK pd = 8 callref = 0x4C
Channel ID i = 0x89
Signal i = 0x4F - Alerting off
BR2/0:1 LCP: TIMEout: State Listen
BR2/0:1 LCP: O CONFREQ [Listen] id 223 len 27
BR2/0:1 LCP: AuthProto CHAP (0x0305C22305)
BR2/0:1 LCP: MagicNumber 0x556F8A69 (0x0506556F8A69)
BR2/0:1 LCP: MRRU 1524 (0x110405F4)
BR2/0:1 LCP: EndpointDisc 1 Kenny (0x1308014B656E6E79)
BR2/0:1 LCP: I CONFACK [REQsent] id 223 len 27
BR2/0:1 LCP: AuthProto CHAP (0x0305C22305)
BR2/0:1 LCP: MagicNumber 0x556F8A69 (0x0506556F8A69)
BR2/0:1 LCP: MRRU 1524 (0x110405F4)
BR2/0:1 LCP: EndpointDisc 1 Kenny (0x1308014B656E6E79)
BR2/0:1 LCP: I CONFREQ [ACKrcvd] id 2 len 26
Oct 1 19:30:27.696 PDT: BR2/0:1 LCP: AuthProto CHAP (0x0305C22305)
Oct 1 19:30:27.696 PDT: BR2/0:1 LCP: MagicNumber 0x04A45CA9 (0x050604A45CA9)
Oct 1 19:30:27.696 PDT: BR2/0:1 LCP: MRRU 1524 (0x110405F4)
Oct 1 19:30:27.696 PDT: BR2/0:1 LCP: EndpointDisc 1 Kyle (0x1307014B796C65)
BR2/0:1 LCP: O CONFACK [ACKrcvd] id 2 len 26
BR2/0:1 LCP: AuthProto CHAP (0x0305C22305)
BR2/0:1 LCP: MagicNumber 0x04A45CA9 (0x050604A45CA9)
BR2/0:1 LCP: MRRU 1524 (0x110405F4)
BR2/0:1 LCP: EndpointDisc 1 Kyle (0x1307014B796C65)
BR2/0:1 LCP: State is Open
BR2/0:1 PPP: Phase is AUTHENTICATING, by both [0 sess, 1 load]
Oct 1 19:30:27.696 PDT: BR2/0:1 CHAP: O CHALLENGE id 222 len 26 from "Kenny"
BR2/0:1 CHAP: I CHALLENGE id 1 len 25 from "Kyle"
BR2/0:1 CHAP: Waiting for peer to authenticate first
BR2/0:1 LCP: I TERMREQ [Open] id 3 len 4
BR2/0:1 LCP: O TERMACK [Open] id 3 len 4
BR2/0:1 PPP: Phase is TERMINATING [0 sess, 1 load]
ISDN BR2/0: RX <- DISCONNECT pd = 8 callref = 0x4C
Cause i = 0x8090 - Normal call clearing
%ISDN-6-CONNECT: Interface BRI2/0:1 is now connected to Kyle
%ISDN-6-DISCONNECT: Interface BRI2/0:1 disconnected from Kyle, call lasted 4 seconds
%LINK-3-UPDOWN: Interface BRI2/0:1, changed state to down
BR2/0:1 LCP: State is Closed
BR2/0:1 PPP: Phase is DOWN [0 sess, 1 load]
BR2/0:1 DDR: disconnecting call
ISDN BR2/0: TX -> RELEASE pd = 8 callref = 0xCC
ISDN BR2/0: RX <- RELEASE_COMP pd = 8 callref = 0x4C
And the logs that are sent to syslog look like this:
------------------------------------------------------------------
Oct 1 19:01:54 Kenny 31077: Oct 1 19:01:54.707 PDT: %ISDN-6-CONNECT: Interface BRI2/0:1 is now connected to Kyle
Oct 1 19:01:55 Kenny 31078: Oct 1 19:01:54.707 PDT: %ISDN-6-DISCONNECT: Interface BRI2/0:1 disconnected from Kyle, call lasted 2 seconds
Oct 1 19:30:28 Kenny 31083: Oct 1 19:30:28.920 PDT: %ISDN-6-CONNECT: Interface BRI2/0:1 is now connected to Kyle
Oct 1 19:30:29 Kenny 31084: Oct 1 19:30:28.920 PDT: %ISDN-6-DISCONNECT: Interface BRI2/0:1 disconnected from Kyle, call lasted 4 seconds
For obvious reasons, I've changed the IP addresses, phone numbers and passwords. Please let me know if anyone has any ideas or suggestions. I've tried using recent firmware, and both routers are on 12.2.12, and have had the same problem from 12.2.6 onward AFAIK.
Thank you for any assistance or comments.
---Maxx
10-01-2002 07:29 PM
You might want to add 2 commands at each end..
at 3600 end
int bri 0/0
ppp chap hostname gw-c2621-1
ppp chap password xxxxxxxxxxxxx
at 2600 end
int bri 0/0
ppp chap hostname sj-c3662-1
ppp chap password xxxxxxxxxxxxx
This should work.
10-02-2002 11:11 AM
Thank you. Exactly what was needed.
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