interface dialer




interface dialer number

Syntax Description:


Number of the dialer rotary group. It can be number in the range 0 through 255.

Command Description:

To define a dialer rotary group, use the interface dialer global configuration command.

This command first appeared in Cisco IOS Release 10.0.

Dialer rotary groups allow you to apply a single interface configuration to a set of physical interfaces. This allows a group of interfaces to be used as a pool of interfaces for calling many destinations.

Once the interface configuration is propagated to a set of interfaces, those interfaces can be used to place calls using the standard DDR criteria. When multiple destinations are configured, any of these interfaces can be used for outgoing calls.

Dialer rotary groups are useful in environments that require multiple calling destinations. Only the rotary group needs to be configured with the dialer map commands. The only configuration required for the interfaces is the dialer rotary-group command indicating that each interface is part of a dialer rotary group.

Although a dialer rotary group is configured as an interface, it is not a physical interface. Instead, it represents a group of interfaces. Interface configuration commands entered after the interface dialer command will be applied to all physical interfaces assigned to specified rotary groups. Individual interfaces in a dialer rotary group do not have individual addresses. The dialer interface has a protocol address, and that address is used by all interfaces in the dialer rotary group.


The following example identifies interface dialer 1 as the dialer rotary group leader. Interface dialer 1 is not a physical interface, but represents a group of interfaces. The interface configuratin commands that follow apply to all interfaces included in this group.

Router(config)#interface dialer 1
Router(config-if)#encapsulation ppp
Router(config-if)#authentication chap
Router(config-if)#dialer in-band ip address
Router(config-if)#dialer map ip name YYY 14155553434
Router(config-if)#dialer map ip name ZZZ


Related Commands:

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