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This chapter describes the function and displays the syntax for commands required to configure interfaces on the router functioning as the hub in a hub-and-spoke network topology. For more information about defaults and usage guidelines, see the corresponding chapter of the Dial Solutions Command Reference.
To clear the values of dialer statistics for one or more serial interfaces or Basic Rate Interfaces (BRIs) configured for DDR, use the clear dialer privileged EXEC command.
clear dialer [interface type number]| interface | (Optional) Indicates that one interface will be specified. |
| type | (Optional) Interface type, either async, serial, or bri. |
| number | (Optional) Interface number. |
| slot/port | Backplane slot number and port number on the interface. See your hardware installation manual for the specific slot and port numbers. |
To enable DDR on an interface and specify that the serial line is connected by non-V.25bis modems using Electronic Industries Association (EIA) signaling only--specifically, the data terminal ready (DTR) signal--use the dialer dtr interface configuration command. To disable dial-on-demand routing (DDR) for the interface, use the no form of this command.
dialer dtrTo set the length of time an interface stays down after a call has completed or failed and before it is available to dial again, use the dialer enable-timeout interface configuration command. To return to the default value, use the no form of this command.
dialer enable-timeout seconds| seconds | Time in seconds that the Cisco IOS software waits before the next call can occur on the specific interface. Acceptable values are positive, nonzero integers.
This value must be greater than the serial pulse interval for this interface, set via the pulse-time command. |
To specify the amount of time that a line for which there is contention will stay idle before it is disconnected and the competing call is placed, use the dialer fast-idle interface configuration command. To return to the default value, use the no form of this command.
dialer fast-idle seconds| seconds | Idle time, in seconds, that must occur on an interface before the line is disconnected. Acceptable values are positive, nonzero integers. |
To control access by configuring an interface to belong to a specific dialing group, use the dialer-group interface configuration command. To remove an interface from the specified dialer access group, use the no form of this command.
dialer-group group-number| group-number | Number of the dialer access group to which the specific interface belongs. This access group is defined with the dialer-list command. Acceptable values are nonzero, positive integers between 1 and 10. |
To allow interesting outgoing packets to be queued until a modem connection is established, use the dialer hold-queue interface configuration command. To disable the hold queue, use the no form of this command.
dialer hold-queue packets| packets | Number of packets, in the range 0 to 100 packets, to hold in the queue. This argument is optional with the no form of the command. |
To specify the idle time before the line is disconnected, use the dialer idle-timeout interface configuration command. To reset the idle timeout to the default, use the no form of this command.
dialer idle-timeout seconds| seconds | Idle time, in seconds, that must occur on the interface before the line is disconnected. Acceptable values are positive, nonzero integers. |
To specify that dial-on-demand routing (DDR) is to be supported, use the dialer in-band interface configuration command. To disable DDR for the interface, use the no form of this command.
dialer in-band [no-parity | odd-parity]| no-parity | (Optional) Indicates that no parity is to be applied to the dialer string that is sent out to the modem on synchronous interfaces. |
| odd-parity | (Optional) Indicates that the dialed number has odd parity (7-bit ASCII characters with the eighth bit as the parity bit) on synchronous interfaces. |
To define a DDR dialer list to control dialing by protocol or by a combination of protocol and access list, use the dialer-list global configuration command. To delete a dialer list, use the no form of this command.
dialer-list dialer-group protocol protocol-name {permit | deny | list access-list-number || dialer-group | Number of a dialer access group identified in any dialer-group interface configuration command. |
| protocol-name | One of the following protocol keywords: appletalk, bridge, clns, clns_es, clns_is, decnet, decnet_router-L1, decnet_router-L2, decnet_node, ip, ipx, vines, or xns. |
| permit | Permits access to an entire protocol. |
| deny | Denies access to an entire protocol. |
| list | Specifies that an access list will be used for defining a granularity finer than an entire protocol. |
| access-list-number | Access list numbers specified in any DECnet, Banyan VINES, IP, Novell IPX, or XNS standard or extended access lists, including Novell IPX extended service access point (SAP) access lists and bridging types. |
| access-group | Filter list name used in the clns filter-set and clns access-group commands. |
To configure bandwidth on demand by setting the maximum load before the dialer places another call to a destination, use the dialer load-threshold interface command. To disable the setting, use the no form of this command.
dialer load-threshold load [outbound | inbound | either]| load | Interface load used to determine whether to initiate another call or to drop a link to the destination. This argument represents a utilization percentage; it is a number between 1 and 255, where 255 is 100%. |
| outbound | (Optional) Calculates the actual load using outbound data only. |
| inbound | (Optional) Calculates the actual load using inbound data only. |
| either | (Optional) Sets the maximum calculated load as the larger of the outbound and inbound loads. |
To configure a serial interface or Integrated Services Digital Network (ISDN) interface to call one or multiple sites or to receive calls from multiple sites, use a form of the dialer map interface configuration command; all options are shown in the first form of the command. To delete a particular dialer map entry, use a no form of this command.
dialer map protocol next-hop-address [name hostname] [spc] [speed 56 | 64] [broadcast]To set the priority of an interface in a dialer rotary group, use the dialer priority interface configuration command. Use the no form of the command to revert to the default setting.
dialer priority number| number | Priority of an interface in a dialer rotary group; the highest number indicates the highest priority. This is a number from 0 through 255. The default value is 0, the lowest priority. |
To include a specified interface in a dialer rotary group, use the dialer rotary-group interface configuration command.
dialer rotary-group number| number | Number of the previously defined dialer interface in whose rotary group this interface is to be included. This is a number from 0 to 255. The dialer interface is defined by the interface dialer command. |
To specify the method for identifying the outbound line to be used for ISDN or asynchronous DDR calls, use the dialer rotor interface configuration command.
dialer rotor {priority | best}| priority | Selects the first outbound line with the highest priority; this is the selection criterion that was previously used. |
| best | Selects the outbound line with the most recent success. If that line also has the most recent failure, then it will try the line with the least recent failure. If that line also has the most recent failure, it will then try an as-of-yet untried outbound line. |
To specify the string (telephone number) to be called for interfaces calling a single site, use the dialer string interface configuration command. To delete the dialer string specified for the interface, use the no form of this command.
dialer string dial-string[:isdn-subaddress]| dial-string | String of characters to be sent to a DCE device. |
| :isdn-subaddress | (Optional) ISDN subaddress. |
To specify the length of time the interface waits for a carrier, use the dialer wait-for-carrier-time interface configuration command. To reset the carrier wait time value to the default, use the no form of this command.
dialer wait-for-carrier-time seconds| seconds | Number of seconds that the interface waits for the carrier to come up when a call is placed. Acceptable values are positive, nonzero integers. |
To define a dialer rotary group, use the interface dialer global configuration command.
interface dialer number| number | Number of the dialer rotary group. It can be number in the range 0 through 255. |
To display general diagnostic information for interfaces configured for DDR, use the show dialer EXEC command.
show dialer [interface type number]| interface | (Optional) Displays information for the interface specified by the arguments type and number. |
| type | (Optional) Interface type. |
| number | (Optional) Interface number. |
To display the current dialer maps, next-hop protocol addresses, user names, and interfaces on which they are configured, use the show dialer map privileged EXEC command.
show dialer map
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