Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member



1)i have to know about when & where we have to use the dialer watch in the ISDN Technology?

2)what about the route tag?when & where we have to Taging The Route?

10xs in Advance


Re: Dialer-Watch

Dialer watch is used in ISDN to make ISDN work as a backup connection of leased line, frame relay etc.

check below URL to get more information.

hope it helps ... rate if it does ...

New Member

Re: Dialer-Watch

1. Dialer watch can be considered as regular DDR with no requirement for interesting traffic, just lost routes. By configuring a set of watched routes that define the primary interface, you are able to monitor and track the status of the primary interface as watched routes are added and deleted.

2. Route tags are simple tags( mark/label) which are used to distinguish between routes. Its an additional chateristics of a route, which is usually local to the router. You can work on selective routes with use use of route-maps & tag of routes.




Re: Dialer-Watch


to bring a backup link up should the primary link fails ,there is so many methods to achieve that.for instance (BACKUP interface/dialer),static floating , and dialer-watch, each of those methods can be used in situation deponding on your needs,the backup monitors the status of the primary link layer1 and 2 if it is down or a predefined threshold-load is reached, the static-float monitors the ip routing table layer 3,the dialer-watch monitor a list of specific routes layer 3, if those disappear from the routing table it will try to reach the network by others mean ,it work with interfaces that have dial capabilities such as isdn.

route tagging can be done by route-map or redistribute commands, when it can be used ??

when you do reditribution between routing protocols there is some situations where you can introduce a feed back routing especialy in topologies where you have two or more boundary router all doing redistribution. so the requirement here is to flag or color the routes redistributed on one router with a tag so that you can recognise them and prohibit them from beeing redistributed back by the other router that is doing redistribution also.


do rate if it does clarify

New Member

Re: Dialer-Watch

HI All

10xs for all ur reply.