02-14-2007 07:40 AM - edited 03-03-2019 03:45 PM
I have 2 2811 routers connected with ISDN for backup propose, they can be triggered automatically once the primary link goes down, but cannot be shut down automatically once the primary link resumes. Here is the configuration:
R1:
interface BRI0/0/0
no ip address
encapsulation ppp
no logging event link-status
dialer pool-member 1
isdn switch-type basic-net3
ppp multilink load-threshold 1 outbound
!
interface Dialer0
ip address 172.16.0.1 255.255.255.252
encapsulation ppp
no logging event link-status
dialer pool 1
dialer remote-name r2
dialer idle-timeout 5
dialer string xxxxxxx
dialer-group 1
ppp authentication chap
ppp multilink
ppp multilink load-threshold 1 either
ip route 0.0.0.0 0.0.0.0 Dialer0 200
ip route 10.X.X.0 255.255.255.0 10.X.X.2
router bgp 2
neighbor 172.16.0.2 remote-as 3
access-list 110 deny tcp any any eq bgp
access-list 110 permit ip any any
dialer-list 1 protocol ip list 110
R2:
interface BRI0/0/0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
ppp authentication chap
ppp multilink load-threshold 1 outbound
!
interface Dialer0
ip address 172.16.0.2 255.255.255.252
encapsulation ppp
dialer pool 1
dialer remote-name r1
dialer idle-timeout 300
dialer string xxxxxxxx
dialer-group 1
ppp authentication chap
ppp multilink
ppp multilink load-threshold 1 either
!
router bgp 3
neighbor 172.16.0.1 remote-as 2
neighbor 172.16.0.1 default-originate
no auto-summary
access-list 110 deny tcp any any eq bgp
access-list 110 permit ip any any
dialer-list 1 protocol ip list 110
From the config, I found both end all can initial call to other end, is it because of this? or because BGP? and how to solve?
thanks
02-20-2007 09:05 AM
It may be because of a bug affecting IOS ver 12.0(9) and below. If your IOS ver is 12.0(9) or below please upgrade to 12.0(10) or above. Else in primary interface config please check if backup dealy x x is configured or not. If not please try to configure it with some values in place of x. Else try to change the admin distances for the two different routes. This way only one routes stays in the routing table. You may get help fro this troubleshooting document
02-20-2007 09:43 AM
Remove Dialer string from one end. So, one one router will have dialer string.... it will only able to dial the number.
Ex: Remove dialer string from r2.
R1 only will able to dial.
Regards,
Dharmesh Purohit
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