4G Cellular interface using dialer watch-list and dialer-list

[Gordel2306]

Hello,

I have a router which had it's fixed circuit decommed & now is running on just the 4G cellular link. The issue I have is that the dialer doesn't seem to kick in after a reboot. Is it ok to have config as per below which uses a dialer-list & a dialer watch-list on the cellualr interface. This router is using DMVPN if that makes a difference.

interface Cellular0/0/0
ip address negotiated
ip virtual-reassembly in
encapsulation slip
history BPS
dialer in-band
dialer idle-timeout 0
dialer string lte
dialer watch-group 1
dialer-group 1
async mode interactive
no snmp trap link-status
routing dynamic
end

dialer watch-list 1 ip 2.3.4.5 0.0.0.0
dialer watch-list 1 delay route-check initial 60
dialer watch-list 1 delay connect 1
dialer-list 1 protocol ip permit

[Elliot Dierksen · Accepted solution]

You need some kind of route that points traffic to the dialer interface, or there will never be any traffic that hits it. Thus, no dialing. Something like this.

ip route 0.0.0.0 0.0.0.0 Dialer1

If you normally learn a default route via some other path (you said the cell was a backup circuit), you can change the admin distance on the this route to be less preferred than the normal default.

[Gordel2306 · Accepted solution]

Thanks Elliot that's a good idea however I ended up setting up IP SLA to ping the head end out of the cellular interface.

It's now stays up all the time.

[Wizard4777]

the config is correct. and you need a default route as well