Dialer watch on DSL

Unanswered Question
Apr 18th, 2007
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Hi Guys..

I have a Cisco 2821 with a DSL WIC and normal fast ethernet connection.. im trying to backup the main interface by using dialer-watch on the ethernet.. backup interface isn't good enough cause I can't rely on line protocol..

If I configure dialer-watch on the dialer interface it doesn't kill the dialer, it has no effect whatsoever.. All I wanna know is, is this command supported on DSL at all? or is it only for old style ISDN stuff, i've seen some examples of it being used with DSL and Scott Morris's example on TCP mag,,, but I can't get it to work.. My config is pretty simple..

Interface dialer 1

ip addresses ect..

dialer watch-group 1


dialer watch-list 1 ip <tracked route>

Would be great if someone could let me know or offer any assistance.. I do have an alternative however if this works it would be great.... cheers


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tim-gregory Wed, 04/18/2007 - 23:14
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I've looked into this, I havn't found a way of triggering a dialer address with object tracking.. the DSL interface needs to be down when the normal interface is working, like it would be if the backup interface command was used, however I havn't figured out a way to do this with object tracking..



deigonza Thu, 04/26/2007 - 04:23
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What you need to implement is Reliable Static Routing Backup Using Object Tracking:


Config Example:

conf t

rtr 1

type echo protocol ipIcmpEcho


rtr schedule 1 life forever start-time now

track 123 rtr 1 reachability


access-list 101 permit icmp any host echo

access-list 102 deny icmp host echo-reply any

access-list 102 permit ip any any

interface Serial1/0

ip access-group 102 in

interface Dialer0

ip access-group 102 in


route-map LOCAL permit 10

match ip address 101

set ip next-hop

set interface Null0


ip local policy route-map LOCAL

ip route track 123

ip route Serial1/0 254 10

PLS Rate if helpful.


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