11-05-2010 11:25 PM - edited 07-03-2021 07:22 PM
hi
We have mpls (leased line) as a primary link & CDMA connectivity as a backup installed on a router .
When my primary link goes down router won't shift to cdma automatically i have to initiate connection then
it starts pinging (Ping test ip from end user). I also tried making CDMA bacup of serial interface (Backup command) it also won't work.
Current configuration on my end router for CDMA
chat-script
int cellular 0/1/0
ip address negotiated
en ppp
dialer in-band
dialer-string
dialer-group 1
ppp chap hostname
ppp chap password
ppp ipcp dns request
access-list 2 permit any
dialer-list 1 protocol ip list 2
line 0/1/0
exec-timeout 0 0
script dialer cbi
modem InOut
no exec
transport output none
txspeed
rxspeed
there are 2 default routes
0.0.0.0 0.0.0.0 serrial int (Pointing to serial default ad)
0.0.0.0 0.0.0.0 cellular int 50 (Pointing to cellular with higher ad)
there is one more static route to check the CDMA connectivity
10.1.1.1 255.255.255.255 cellular int (Static with default Ad) this ip we use to test connect initial connectivity.
Is there any other configuration by which it can shift automatically on CDMA OR ther should be any change in this configuration .
Please help us out
regards
pushpak
11-11-2010 03:43 AM
Hi Pushpak,
If you test the CDMA link independently, does it come up?
What I mean is:
- the CDMA link works fine, but you need help to configure it as backup
or
- the backup solution does not work because CDMA link does not come up?
Can you please attach the config without editing it? E.g. the chatscript is cut
Can you try these steps:
- remove "transport output none" from the line
- enable "debug chat", "debug dialer", "debug ppp nego".
- start ping traffic that triggers the cellular interface and collect the logs
Once you got the confirmation that the CDMA link works, you can use the usual method to configure dialer interfaces as backup, see for example:
http://www.cisco.com/en/US/tech/tk801/tk133/technologies_tech_note09186a008009457d.shtml
Cheers
Marco
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