ISDN callback feature not working for me !

[tangerine0072000]

Hi all,
Does anyone have an example config of two routers where ISDN callback has worked ? Having a nightmare myself getting this working.

Having a Cisco 3600 using PRI/ISDN 30 dialing into a 1710 which I want to callback the 3600.

thanks,

 

[leedsit]

Hi,

Could you post your Dialer and BRI/PRI configs so we could take a look?

LEEroy
MCNE6,CCNA2,CWNA, Project+, CCSA

 

[tangerine0072000]

Here are the configs...

Router A (3600 with PRI) wants Router B (1700) to dial back


ROUTER_A Config

Building configuration...
Current configuration : 2073 bytes

version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption

hostname ROUTER_A

enable secret 5 $1$8.I7$qPblGme4c5QfCMkOc3Iym1
enable password cisco

username ROUTER_B password 0 wH8ll3yr8ng3
ip subnet-zero

isdn switch-type primary-net5

controller E1 0/0
pri-group timeslots 1-31

interface Loopback0
no ip address

interface FastEthernet0/0
ip address 192.168.18.235 255.255.255.0
speed auto
full-duplex

interface Serial0/0:15
ip unnumbered Loopback0
encapsulation ppp
dialer pool-member 1
isdn switch-type primary-net5
ppp authentication chap pap

interface Dialer1
ip unnumbered FastEthernet0/0
encapsulation ppp
dialer pool 1
dialer remote-name ROUTER_B
dialer idle-timeout 300
dialer string 12345678
dialer hold-queue 100 timeout 20
dialer-group 1
no cdp enable
ppp authentication pap chap
ppp pap sent-username ROUTER_A password 0 3434rt22444

ip classless

ip route 172.22.0.0 255.255.0.0 Dialer1

no ip http server

dialer-list 1 protocol ip permit

no cdp run

line con 0
line aux 0
line vty 0 4
password remote
login
transport input telnet

end



ROUTER_B Config (router needs to dial back)

Building configuration...

Current configuration : 1502 bytes

version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption

hostname ROUTER_B

logging buffered 4096 debugging
aaa new-model
aaa authentication login default local
aaa authentication ppp default local
enable secret 5 $1$tLkG$qXQYhtVbNaEhyyp/NvTc//
enable password password

username ROUTER_B password 0 3434rt22444

ip subnet-zero

no ip domain-lookup
isdn switch-type basic-net3
isdn voice-call-failure 0

interface Ethernet0
ip address 172.22.2.1 255.255.0.0
no cdp enable

interface BRI0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
no cdp enable
ppp authentication pap
ppp multilink

interface Dialer0
description Connection to Netcare NOC
ip unnumbered Ethernet0
encapsulation ppp
dialer pool 1
dialer remote-name ROUTER_A
dialer idle-timeout 600
dialer enable-timeout 5
dialer string 87654321
dialer-group 5
no cdp enable
ppp authentication pap chap callin
ppp pap sent-username ROUTER_B password 0 wH8ll3yr8ng3

no ip http server
ip classless
ip route 192.168.18.0 255.255.255.0 Dialer0

access-list 3 permit 192.168.18.0 0.0.0.255
dialer-list 5 protocol ip permit
no cdp run

line con 0
stopbits 1
line vty 0 4
access-class 3 in
password password

no rcapi server

end

ROUTER_B#

 

[leedsit]

Hi,

bear with me as studying for the BCRAN right now but looks like the

PPP Callback accept
PPP Callback request and possibly dialer callback-secure commands are missing...



LEEroy
MCNE6,CCNA2,CWNA, Project+, CCSA

 

[leedsit]

Seems the callback client ( router initiating the call ) should have PPP callback request.

The Router that will call back should have ppp callback accept

Those commands should go on the physical interfaces are far as I can tell.

LEEroy
MCNE6,CCNA2,CWNA, Project+, CCSA

 

[tangerine0072000]

yeh I've tried these in a number of different ways, but it never dials back. I can dial in not problem, but soon as I use the 'ppp callback request' option, it never dials back.

 

[leedsit]

You sure your CHAP is authenticating properly... I.E the passwords are equal at both sides????

LEEroy
MCNE6,CCNA2,CWNA, Project+, CCSA

 

[tangerine0072000]

must admit, not sure if these commands should go on the bri/pri or on the dialer interface ? any takers ?

 

[leedsit]

On Router-B your username / password should say username Router-A not B

LEEroy
MCNE6,CCNA2,CWNA, Project+, CCSA

 

[leedsit]

As a note the commands

ppp pap sent-username ROUTER_B password 0 wH8ll3yr8ng3

should only be used for PAP, not CHAP,

LEEroy
MCNE6,CCNA2,CWNA, Project+, CCSA

 

[tangerine0072000]

sorry that was my typo, trying to remove the original router host names and phone numbers etc ...

 

[leedsit]

So are you confident with debugging that your authentication is working ok?

LEEroy
MCNE6,CCNA2,CWNA, Project+, CCSA

 

[tangerine0072000]

yes I see now that routerB actually does call back but when using 'sh isdn active' then it fails

 

[leedsit]

Could you debug PPP Negotiation and PPP Authentication on both devices when B tried to dial back A and post the output?

LEEroy
MCNE6,CCNA2,CWNA, Project+, CCSA