O'Reilly logo

Cisco IOS in a Nutshell, 2nd Edition by James Boney

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Name

dialer-group — interface

Synopsis

dialer-group number
no dialer-group number

Configures

Associates an interface with a dialer group

Default

None

Description

This command adds the interface to the dialer group specified by number. An interface can have only one dialer group associated with it. Each dialer group has an associated access list that defines “interesting” traffic for this interface. If the traffic is permitted by the access list, a call is initiated for the interface if the interface is not already connected.

Example

The following commands add the async1 interface to dialer-group 1. access-list 110 specifies the traffic that causes this interface to initiate a call; in this case, ICMP traffic doesn’t bring up the connection, but any other IP traffic does. Note that this access list does not block ICMP traffic once the link is up; it just prevents ICMP traffic from bringing it up in the first place.

! Set the interface as part of the dialer group
interface async 1
  dialer-group 1
!
! Set the dialer group to use access-list 110
dialer-list 1 list 110
!
! Configure the access-list for the dialer group
access-list 110 deny icmp any any
access-list 110 permit ip any any

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required