From: John Tafasi (johntafasi@yahoo.com)
Date: Wed Dec 18 2002 - 04:54:27 GMT-3
Hi group,
I have r2 which is configured to request callback from r5. The problem is
that r2 does not wait for r5 to callback and will repeat the calling r5 and
request callback. However r5 will eventually succeed and callback r2. My
question is how can you prevent r2 from repeating the call to r5? I have
pasted below the configuration for both routers and the output of "debug
isdn q931" and "debug ppp authentication" on r2.
r2#show run
!
version 11.3
!
hostname r2
!
username r5 password 7 13061E010803
ip subnet-zero
no ip domain-lookup
isdn switch-type basic-ni1
!
!
interface BRI0
no ip address
no ip directed-broadcast
encapsulation ppp
dialer pool-member 1
isdn spid1 0835866101
isdn spid2 0835866301
ppp callback request
!
interface Dialer1
ip address 10.10.10.1 255.255.255.0
no ip directed-broadcast
encapsulation ppp
dialer remote-name r5
dialer enable-timeout 1000
dialer string 8358662
dialer hold-queue 100 timeout 30
dialer pool 1
dialer-group 1
ntp broadcast
pulse-time 0
ppp authentication chap
!
!
map-class dialer eng
access-list 1 deny any
access-list 100 permit tcp any any eq telnet
access-list 100 permit icmp any any
dialer-list 1 protocol ip list 100
!
line con 0
exec-timeout 0 0
logging synchronous
transport input none
line aux 0
line vty 0 4
exec-timeout 0 0
password 7 06101B38
login
telnet break-on-ip
telnet ip-on-break
!
ntp clock-period 17179853
end
r2#
=================
r5#show run
version 12.2
!
hostname r5
username r2 password 7 045802150C2E
no ip domain-lookup
!
isdn switch-type basic-ni
!
!
!
!
!
interface BRI0
ip address 10.10.10.2 255.255.255.0
encapsulation ppp
dialer callback-secure
dialer map ip 10.10.10.1 name r2 class eng broadcast 8358661
dialer-group 1
isdn switch-type basic-ni
isdn spid1 0835866201
isdn spid2 0835866401
cdapi buffers regular 0
cdapi buffers raw 0
cdapi buffers large 0
ppp callback accept
ppp authentication chap
ppp chap hostname r5
!
!
map-class dialer eng
dialer callback-server username
access-list 100 permit tcp any any eq telnet
access-list 100 permit icmp any any
dialer-list 1 protocol ip list 100
!
!
line con 0
exec-timeout 0 0
logging synchronous
transport input none
line aux 0
line vty 0 4
password 7 045802150C2E
login
autocommand access-enable host timeout 5
!
ntp clock-period 17179628
ntp master 4
ntp peer 10.10.110.16
end
r5#
==============
r2#show debug
ISDN:
ISDN Q931 packets debugging is on
r2#debu ppp authen
PPP authentication debugging is on
r2#
r2#ping 10.10.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
r2#
.Mar 2 11:01:03.477: ISDN BR0: TX -> SETUP pd = 8 callref = 0x04
.Mar 2 11:01:03.481: Bearer Capability i = 0x8890
.Mar 2 11:01:03.485: Channel ID i = 0x83
.Mar 2 11:01:03.485: Keypad Facility i = '8358662'
.Mar 2 11:01:03.529: ISDN BR0: RX <- CALL_PROC pd = 8 callref = 0x84
.Mar 2 11:01:03.529: Channel ID i = 0x89
.Mar 2 11:01:03.681: ISDN BR0: RX <- CONNECT pd = 8 callref = 0x84
.Mar 2 11:01:03.693: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up
.Mar 2 11:01:03.721: %DIALER-6-BIND: Interface BRI0:1 bound to profile
Dialer1
.Mar 2 11:01:03.733: BR0:1 PPP: Treating connection as a callout
.Mar 2 11:01:03.733: ISDN BR0: TX -> CONNECT_ACK pd = 8 callref = 0x04
.Mar 2 11:01:05.797: BR0:1 PPP: Phase is AUTHENTICATING, by the peer
.Mar 2 11:01:07.653: BR0:1 PPP: Phase is AUTHENTICATING, by the peer
.Mar 2 11:01:07.673: BR0:1 CHAP: I CHALLENGE id 195 len 23 from "r5"
.Mar 2 11:01:07.681: BR0:1 CHAP: O RESPONSE id 195 len 23 from "r2"
.Mar 2 11:01:07.705: BR0:1 CHAP: I SUCCESS id 195 len 4
.Mar 2 11:01:07.769: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to up
.Mar 2 11:01:07.777: ISDN BR0: RX <- DISCONNECT pd = 8 callref = 0x84
.Mar 2 11:01:07.777: Cause i = 0x8090 - Normal call clearing
.Mar 2 11:01:07.797: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected
from 8358662 , call lasted 4 seconds
.Mar 2 11:01:07.801: %LINK-3-UPDOWN: Interface BRI0:1, changed state to
down
.Mar 2 11:01:07.833: %DIALER-6-UNBIND: Interface BRI0:1 unbound from
profile Dialer1
.Mar 2 11:01:07.837: ISDN BR0: TX -> RELEASE pd = 8 callref = 0x04
.Mar 2 11:01:07.857: ISDN BR0: RX <- RELEASE_COMP pd = 8 callref = 0x84
.Mar 2 11:01:08.773: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to down
.Mar 2 11:01:09.477: ISDN BR0: TX -> SETUP pd = 8 callref = 0x05
.Mar 2 11:01:09.481: Bearer Capability i = 0x8890
.Mar 2 11:01:09.481: Channel ID i = 0x83
.Mar 2 11:01:09.485: Keypad Facility i = '8358662'
.Mar 2 11:01:09.525: ISDN BR0: RX <- CALL_PROC pd = 8 callref = 0x85
.Mar 2 11:01:09.529: Channel ID i = 0x89
.Mar 2 11:01:09.689: ISDN BR0: RX <- CONNECT pd = 8 callref = 0x85
.Mar 2 11:01:09.705: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up
.Mar 2 11:01:09.733: %DIALER-6-BIND: Interface BRI0:1 bound to profile
Dialer1
.Mar 2 11:01:09.741: BR0:1 PPP: Treating connection as a callout
.Mar 2 11:01:09.745: ISDN BR0: TX -> CONNECT_ACK pd = 8 callref = 0x05
.Mar 2 11:01:11.809: BR0:1 PPP: Phase is AUTHENTICATING, by the peer
.Mar 2 11:01:13.657: BR0:1 PPP: Phase is AUTHENTICATING, by the peer
.Mar 2 11:01:13.681: BR0:1 CHAP: I CHALLENGE id 196 len 23 from "r5"
.Mar 2 11:01:13.689: BR0:1 CHAP: O RESPONSE id 196 len 23 from "r2"
.Mar 2 11:01:13.709: BR0:1 CHAP: I SUCCESS id 196 len 4
.Mar 2 11:01:13.773: ISDN BR0: RX <- DISCONNECT pd = 8 callref = 0x85
.Mar 2 11:01:13.777: Cause i = 0x8090 - Normal call clearing
.Mar 2 11:01:13.793: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected
from 8358662 , call lasted 4 seconds
.Mar 2 11:01:13.797: %LINK-3-UPDOWN: Interface BRI0:1, changed state to
down
.Mar 2 11:01:13.829: %DIALER-6-UNBIND: Interface BRI0:1 unbound from
profile Dialer1
.Mar 2 11:01:13.837: ISDN BR0: TX -> RELEASE pd = 8 callref = 0x05
.Mar 2 11:01:13.853: ISDN BR0: RX <- RELEASE_COMP pd = 8 callref = 0x85
r2#
.Mar 2 11:01:22.785: ISDN BR0: RX <- SETUP pd = 8 callref = 0x0E
.Mar 2 11:01:22.785: Bearer Capability i = 0x8890
.Mar 2 11:01:22.789: Channel ID i = 0x89
.Mar 2 11:01:22.793: Calling Party Number i = 0x80, '8358662'
.Mar 2 11:01:22.801: %DIALER-6-BIND: Interface BRI0:1 bound to profile
Dialer1
.Mar 2 11:01:22.805: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up
r2#
.Mar 2 11:01:22.837: BR0:1 PPP: Treating connection as a callin
.Mar 2 11:01:22.849: ISDN BR0: TX -> CONNECT pd = 8 callref = 0x8E
.Mar 2 11:01:22.853: Channel ID i = 0x89
.Mar 2 11:01:22.961: ISDN BR0: RX <- CONNECT_ACK pd = 8 callref = 0x0E
r2#
.Mar 2 11:01:26.889: BR0:1 PPP: Phase is AUTHENTICATING, by the peer
.Mar 2 11:01:26.901: BR0:1 CHAP: I CHALLENGE id 197 len 23 from "r5"
.Mar 2 11:01:26.909: BR0:1 CHAP: O RESPONSE id 197 len 23 from "r2"
.Mar 2 11:01:26.933: BR0:1 CHAP: I SUCCESS id 197 len 4
r2#
.Mar 2 11:01:27.865: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to up
r2#
.Mar 2 11:01:28.837: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to
8358662 8358662
r2#
.
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