12-31-2001 10:18 AM - edited 03-01-2019 07:52 PM
Hi,
I have a 3640 router with a ISDN BRI interface. And I also have two 1750 routers each with a BRI interface placed at two different locations.
|------------- Router 1750
|
Router3640|
|
|------------- Router 1750
The 3640 has two serial links to these two 1750 routers.
Now when both the serial links are down i want to use one B channel of 3640 to dial to one 1750 and the other to dial to other 1750.
Can you please give me a sample configuration about how to do this.
If you can give me a URL of cisco site where i can find this kind of configuration it will be very helpful
Thanks in advance
vijay
12-31-2001 11:21 AM
Here is a one-stop-shopping site for all things dial:
http://www.cisco.com/warp/customer/471/index.shtml
Scott
01-03-2002 04:33 AM
Hi,
You should create 2 different dialer interfaces. 1 is configured to dial to location 1 , the other is to location 2. Then you can configure on serial lines such : " backup interface dialer 1"
I wish it will help you
01-22-2002 03:46 AM
I have just completed some project with same situation as yours. This is the configuration, hope it may be helpful. I didn't use "backup interface" command, instead, I used dynamic routing protocol and floating static routes. And the IOS version is 12.2(6), ip only. there are some bugs on isdn with some versions of ios.
!
version 12.2
!
hostname BJ
!
enable password password
!
username SH password password
ip subnet-zero
!
!
!
isdn switch-type basic-net3
!
interface Ethernet0/0
ip address 172.35.16.254 255.255.255.0
half-duplex
!
interface BRI0/0
description Backup ISDN to SH
no ip address
encapsulation ppp
no keepalive
dialer rotary-group 1
isdn switch-type basic-net3
no cdp enable
!
interface Serial1/0
ip address 172.35.250.2 255.255.255.0
no ip mroute-cache
no fair-queue
!
interface Serial1/1
no ip address
shutdown
!
interface Serial1/2
no ip address
shutdown
!
interface Serial1/3
no ip address
shutdown
!
interface Dialer1
description Backup ISDN to SH
ip address 172.35.244.6 255.255.255.0
encapsulation ppp
no keepalive
dialer in-band
dialer idle-timeout 180
dialer enable-timeout 2
dialer map ip 172.35.244.5 name SH 02144444444
dialer hold-queue 50
dialer-group 1
no cdp enable
ppp authentication chap
!
router eigrp 10
redistribute connected
redistribute static
network 172.35.0.0
auto-summary
no eigrp log-neighbor-changes
!
ip classless
ip route 172.35.10.0 255.255.255.0 172.35.244.5 120
ip route 172.35.14.0 255.255.255.0 172.35.244.5 120
no ip http server
ip pim bidir-enable
!
access-list 101 deny eigrp any any
access-list 101 permit ip any 172.35.10.0 0.0.0.255
access-list 101 permit ip any 172.35.14.0 0.0.0.255
dialer-list 1 protocol ip list 101
!
line con 0
line aux 0
line vty 0 4
!
end
version 12.2
!
hostname GZ
!
enable password password
!
username SH password password
ip subnet-zero
!
isdn switch-type basic-net3
!
interface Ethernet0/0
ip address 172.35.14.254 255.255.255.0
half-duplex
!
interface BRI0/0
description Backup ISDN to SH
no ip address
encapsulation ppp
no keepalive
dialer rotary-group 1
isdn switch-type basic-net3
no cdp enable
!
interface Serial1/0
ip address 172.35.252.2 255.255.255.0
no ip mroute-cache
!
interface Serial1/1
no ip address
shutdown
!
interface Serial1/2
no ip address
shutdown
!
interface Serial1/3
no ip address
shutdown
!
interface Dialer1
description Backup ISDN to SH
ip address 172.35.244.4 255.255.255.0
encapsulation ppp
no keepalive
dialer in-band
dialer idle-timeout 180
dialer enable-timeout 2
dialer map ip 172.35.244.5 name SH 02144444444
dialer hold-queue 50
dialer-group 1
no cdp enable
ppp authentication chap
!
router eigrp 10
redistribute connected
redistribute static
network 172.35.0.0
auto-summary
no eigrp log-neighbor-changes
!
ip classless
ip route 172.35.10.0 255.255.255.0 172.35.244.5 120
ip route 172.35.16.0 255.255.255.0 172.35.244.5 120
!
access-list 101 deny eigrp any any
access-list 101 permit ip any 172.35.10.0 0.0.0.255
access-list 101 permit ip any 172.35.16.0 0.0.0.255
dialer-list 1 protocol ip list 101
!
line con 0
line aux 0
line vty 0 4
!
end
version 12.2
!
hostname SH
!
enable password password
!
username BJ password password
username GZ password password
ip subnet-zero
!
!
isdn switch-type basic-net3
!
!
interface Ethernet0/0
description SH LAN
ip address 172.35.10.254 255.255.255.0
half-duplex
!
interface BRI0/0
description Backup ISDN to BJ&GZ
no ip address
encapsulation ppp
no keepalive
dialer rotary-group 1
isdn switch-type basic-net3
no cdp enable
!
interface Serial1/0
description WAN to BJ
ip address 172.35.250.1 255.255.255.0
no ip mroute-cache
no fair-queue
!
interface Serial1/1
no ip address
shutdown
!
interface Serial1/2
description WAN to GZ
ip address 172.35.252.1 255.255.255.0
!
interface Serial1/3
no ip address
shutdown
!
interface Dialer1
description Backup ISDN to BJ&GZ
ip address 172.35.244.5 255.255.255.0
encapsulation ppp
no keepalive
dialer in-band
dialer idle-timeout 180
dialer enable-timeout 2
dialer map ip 172.35.244.4 name GZ 02044444444
dialer map ip 172.35.244.6 name BJ 01066666666
dialer hold-queue 50
dialer-group 1
no cdp enable
ppp authentication chap
!
router eigrp 10
redistribute connected
redistribute static
network 172.35.0.0
auto-summary
no eigrp log-neighbor-changes
!
ip classless
ip route 172.35.14.0 255.255.255.0 172.35.244.4 120
ip route 172.35.16.0 255.255.255.0 172.35.244.6 120
no ip http server
ip pim bidir-enable
!
access-list 101 deny eigrp any any
access-list 101 permit ip any 172.35.14.0 0.0.0.255
access-list 101 permit ip any 172.35.16.0 0.0.0.255
dialer-list 1 protocol ip list 101
!
line con 0
line aux 0
line vty 0 4
!
end
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