ISDN Backup

[scrimmy]

Hi,

I have two C1603R routers running back to back through WIC-1T cards to simulate a leased line. I am attempting to set them up to use the ISDN BRI0 interface as backup to the leased line. I have set the router to dial into our RAS so I can monitor the ISDN call.
When I pull out the serial cable
03:11:08: %LINK-3-UPDOWN: Interface Serial0, changed state to down
03:11:09: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to down
03:11:10: %LINK-3-UPDOWN: Interface Dialer0, changed state to up

But no ISDN call is made

Something so easy can cause so many headaches.


TIA


version 12.0
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname Router
!
enable password 7 1511040D1C7B2A28
!
ip subnet-zero
isdn switch-type basic-net3
!
!
!
interface Ethernet0
description *** Ethernet LAN ***
ip address 198.xxx.xxx.xxx 255.255.255.0
no ip directed-broadcast
no keepalive
!
interface Serial0
description *** Serial line ***
backup interface Dialer0
ip address 10.240.245.66 255.255.255.252
no ip directed-broadcast
encapsulation ppp
clockrate 2000000
!
interface BRI0
no ip address
no ip directed-broadcast
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
no cdp enable
ppp authentication chap
!
interface Dialer0
ip address 10.240.245.66 255.255.255.252
no ip directed-broadcast
encapsulation ppp
dialer remote-name main_office
dialer string ********
dialer load-threshold 128 either
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication chap
ppp multilink
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.240.245.65
ip route 0.0.0.0 0.0.0.0 Dialer0 200
!
dialer-list 1 protocol ip permit

 

[firedragon]

when i was setting up a simaler looking lap, i found that taking out the ppp multilink, made it a lot easier to trouble shoot. also just befor you pull out the s0 int. trun on debug for the isdn call setup or for ppp chap. it will give you an idea of where the call getts hung up at. i found the debug commands to be the most helpful with isdn.

 

[rajunvm]

Try the following steps:

First...Find out if your isdn line is working fine.

Second.....Run the command sh isdn status. Layer 2 status should show Active

Third.....Check whether you have given the required authentication

Fourth.....Remove the Backup commands. Try dialing manually by using isdn call int bri0
Try to debug and see where is the problem. use debug isdn.

Regards
Raju