I have an issue with isdn ddr.
I have a backup isdn enable by dialer watch; furthemore I have configured a dialer list to enable isdn to make a kind of isdn test with icmp to verify periodic connectivity.
Here yo are my config:
no ip address
dialer pool-member 2
snmp trap isdn-calls
isdn switch-type basic-net3
no cdp enable
ip address negotiated
dialer pool 2
dialer idle-timeout 20
dialer string XXX
dialer max-call 2
dialer watch-group 1
no cdp enable
ppp authentication pap callin
ppp pap XXX
ppp multilink links minimum 2
ip route 10.10.10.10 255.255.255.255 Dialer2
access-list 101 permit ip host 192.168.27.82 host 10.10.10.10
dialer watch-list 1 ip 184.108.40.206 255.255.255.255
dialer watch-list 1 delay route-check initial 120
dialer watch-list 1 delay connect 5
dialer watch-list 1 delay disconnect 10
dialer-list 1 protocol ip list 101
Periodically (once a day) I make a ping to test isdn connectivity (ping source 192.168.27.82 dest 10.10.10.10).
After a reload all works fine but
The problem is that...after a while (few days after the reload) the DDR seems not working no more...
With a debug dialer, the same ping doesn't work..
I've just make IOS upgrade/downgrade..but nothing.
Just an info: in this period ISDN line is out-of-order so all the attempts are in the failure state (about 51..).
Can it correlate to my problem? As after a certain number of failure trials, the ddr is blocking?
Many thanks in advance for your support