isdn backup doesnot come untill serial int is physically put down

[ohrahul]

Hi all

Pls help to solve my problem..
I have a 2600 router and with ISDN as backup for serial interface.Isdn does not come up untill i physicall put down the serial interface link (by switching off the Leased Line Modem ).I am using backup interface and given default static route to serial interface and the other route to BRI0 with distance value of 2.Pls let me know the changes.

 

[jeter]

post a config so that we can determine the problem. Jeter@LasVegas.com
J.Fisher CCNA

 

[ohrahul]

Hi jeter

here is the config...

isdn switch-type basic-net3
!
!
!
interface Serial0
bandwidth 256
backup delay 5 30
backup interface BRI0
ip address 202.143.180.10 255.255.255.252
!
interface BRI0
ip address negotiated
ip nat outside
encapsulation ppp
no ip route-cache
dialer idle-timeout 300
dialer string 6697667
dialer load-threshold 1 either
dialer-group 1
isdn switch-type basic-net3
no fair-queue
no cdp enable
ppp authentication pap callin
ppp pap sent-username yanpur password 7 1102181316050D
ppp multilink
hold-queue 50 in
!
interface FastEthernet0
ip address 202.143.181.1 255.255.255.240
ip nat inside
speed auto
!
ip nat inside source list 1 interface BRI0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0
ip route 0.0.0.0 0.0.0.0 BRI0 2
no ip http server
!

 

[jeter]

Sorry for the delay.
I have by isdn backups setup like this.

isdn switch-type basic-dms100
!
Interface serial0.1 point-to-point
ip address xxx.xxx.xxx.xxx
no ip directed-broadcast
backup delay 10 10
backup interface BRI0

interface BRI0
bandwidth 128
ip address xxx.xxx.xxx.xxx
no ip directed-broadcast
encapsulation ppp
dialer string 5551212
dialer string 5551213
dailer load-threshold 1 either
dialer-group 1
isdn switch-type basic-dms100
isdn spid1 70224471710101 2447171
isdn spid2 70224471720101 2447172
no fair-queue
ppp authentication chap callin
ppp multilink
!
!
dialer-list 1 protocol ip permit
Jeter@LasVegas.com
J.Fisher CCNA

 

[ohrahul]

thanx jeter,

both the config seems to be matching but would request u to lookinto my ip routing,any comments on that or how is ur ip routing in ur setup.

 

[jeter]

This is how we are routing!

router eigrp 1
network 10.0.0.0 <--- Fastethernet
network 128.11.0.0 <--- different network
network 192.232.67.0 <--- BRI0 and Serial interface

interface BRI0
bandwidth 128
ip address 192.232.67.102 255.255.255.252


interface Serial0.1 point-to-point
ip address 192.232.67.86 255.255.255.252


interface FastEthernet0
ip address 10.102.23.1 255.255.255.0


Jeter@LasVegas.com
J.Fisher CCNA

 

[ohrahul]

thanx jeter,