What is a dialer interface

what is a dialer interface

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Dialer interfaces had been introduced in the dial-up era and in ISDN access, they provide an abstraction layer from the physical interfaces that actually perform the dial-up. In the past this was useful for example to add additional B channels (64 kbps each) to . For C-DCC, a dialer interface may contain multiple physical interfaces, but a physical interface belongs to only one dialer interface and uses one set of dialer parameters. For RS-DCC, a dialer interface may contain multiple physical interfaces, and a physical interface can belong to multiple dialer interfaces.

The information presented in this document was created from devices in a specific lab environment. All of the devices used in this document started with a cleared default configuration. If you are working in what is noble eightfold path live network, ensure that you understand the potential impact of any command before using it. Use the Software Advisor tool registered customers only to verify that the Cisco IOS inteeface version you are running supports this feature.

For more information on document conventions, see the Cisco Technical Tips Conventions. Legacy dial-on-demand routing DDRalthough useful in many scenarios, is restrictive in instances where you want to differentiate users by defining different characteristics for different users.

This cannot be accomplished with Legacy DDR. Dialer profiles have been designed as a new DDR model to allow a user-specific profile to be configured on the router; the profile would determine the characteristics of a particular user, and the profile would be dynamically bound to a physical interface for example, asynchronous or basic rate interface - BRI for incoming or outgoing DDR calls.

Answer the following questions to determine if Dialer profiles are the best option for your configuration. Any question answered with a 'don't care' should be interpreted as a 'No'. You should apply the answers to the following questions to the flowchart shown below to determine the best method to use.

Is there a per-user requirement? In other words, will it be necessary to apply features differently between users, for example compression, idle timeouts, Layer 3 addressing, or any other service or feature?

Note: sites is an arbitrary number beyond which network scaling becomes a significant issue. This fact alleviates the requirement intsrface a Layer 3 to Layer 2 map and the added complexities of managing the multiple maps.

Dialer profiles allow physical interfaces to take on different characteristics based on incoming or outgoing call requirements. Allow a back-up interface to be non-dedicated and useable when the primary interface is operational. Notice that most of the situations described above are per-user related issues for which Dialer profiles are ideal. Keep in what is a dialer interface that the above list does not cover all situations where Dialer profiles can be used.

Each dialer interface takes an interface description block IDB which is the internal structure that manages an interface. Within Dialer profile, there is no method to configure a generic dialer profile or even a default profile for a group of users that shares the same characteristics.

Each user must have its own profile. Tip: Use Virtual profiles in conjunction with Dialer profiles. Virtual profiles can provide an excellent "default profile". For incoming connections, there is no way to limit the amount of incoming calls to a profile without answering the call first and incurring a charge. Dialer interface - A logical entity that defines a user-specific dialer profile.

All configuration settings specific to the user go under the dialer interface configuration; for example, the Layer 3 protocol addresses, interesting traffic, timeouts.

Notice that this dialer interface is completely different from a dialer interface used as a rotary group with Legacy DDR. For the purpose of this discussion, a dialer profile and a dialer interface should intreface considered synonymous. Dialer pool - Each dialer interface is a member of a single dialer pool; the pool is a group of one or more physical interfaces.

There can be any combination of interfaces asynchronous, ISDN, serial within a pool. Outbound dialing contention for a specific physical interface is resolved with the dialer pool-member priority command. Physical interface - Interfaces such as BRI and async are configured as members of one or more pools, and are minimally configured for encapsulation parameters and identification of the dialer pools that the interface belongs to. We will now elaborate on the concept of dynamically binding dialer profiles to physical interfaces on a per-call basis.

The configuration information for a particular peer is contained within a dialer profile. Once that particular peer is dialed into or is dialed interfave through a physical port, the router must bind the remote's dialer profile to interfcae physical interface. Since there will likely be multiple dialer profiles configured on the router, it must properly choose which profile to bind for any given call either incoming or outgoing.

In discussing this subject with dialing out or dialing in, we provide a step-by-step procedure followed by a flowchart. Please reference the flowchart when using the step-by-step procedure. This scenario is very similar to the operation of a dialer rotary group; the physical interface assumes the dilaer of the dialer profile for a how to make an email with my own domain connection. The binding process is as follows:.

An incoming packet arrives on the router; a routing table lookup indicates its destination address over a dialer interface. The Cisco IOS software notes the dialer interface is a dialer profile. If there is not an existing connection for this profile, the pool that the dialer interface is associated with is identified. If there is an existing connection, the packet is queued to the physical interface and if the traffic is "interesting", the idle timer is reset. If there is no existing connection, the traffic is checked against the dialer-list to determine if it is interesting.

If it is not, the packet is dropped. If it is interesting traffic, proceed to step 5. Without an existing connection, the Cisco IOS software searches interfsce the physical interface that belongs to the dialer interface with the highest dialer pool priority.

This is the interface that will be used for dialing. This interface is bound to the dialer interface, causing the physical interface to assume the configuration of the dialer interface. If the authenticated name of the peer does not match the dialer remote-name in the outgoing dialer profile, the call is disconnected. This sequence is the same regardless if the dialer pool is comprised of ISDN interfaces, asynchronous interfaces, or a mixture of both.

The minimum threshold serves as a reservation system, while the maximum threshold prevents over-utilization of a profile. Once the threshold has been reached, no more outgoing calls are allowed on that profile. Dialer profile binding for incoming calls is more complicated since the incoming interface can potentially be a member of multiple pools, and these pools can interrface associated with multiple dialer profiles.

If dynamic binding is not possible, the call is disconnected. The binding process is as shown below:. Note: This process is shown in order of execution and the call will be bound to the dialer interface when the first match is found.

If the inrerface interface is a member of only one pool, and only one dialer profile is associated with this dialing pool, then bind the physical interface to this dialer profile. Note: This step is only performed if the single configured dialer profile does not have the dialer caller or dialer called command.

If either command is configured, this binding will only be performed if there is a successful match. Attempt to match the Caller ID CLID from the call with the dialer caller command in the dialer interface; only profiles that are associated with the pool to which the physical interface is a member will be checked.

If a match is found, bind the physical interface to what is a dialer interface matched dialer profile. If this check fails for whatever reason, proceed to the next step in a intedface attempt to bind. This step is skipped if CLID is not provided by the telco or dialer caller is not configured under the dialer profile. This incoming call DNIS and subaddress information will be checked against the dialer called command under each dialer profile.

If a match is found, binding succeeds; otherwise, it moves to the next criteria. If the physical interface is configured for PPP authentication, answer the call and authenticate the remote peer. Use the authenticated name to identify the dialer profile that has the same name configured with the dialer remote-name command.

Only profiles that are associated with the pool to which the physical interface is a member will be checked. If a match is found, bind the physical interface to the matched dialer interface. If this check fails for whatever reason, the bind attempt algorithm fails unterface the call is disconnected. Notice that a bind does not imply a successful connection.

It simply means that the physical interface now has a configuration to utilize. Once the binding is successful and the devices authenticate, the router checks whqt the dialer remote-name matches the authenticated username of the peer. If the names do not match, the call is disconnected. The number of inbound calls from a profile can be managed with a maximum how to make thai sauce for stir fry the max-link option in the dialer pool-member command.

The maximum threshold prevents over-utilization of a profile. The router answers the call to intdrface which profile the call is for, and whether or not the profile maximum connection limit has been reached.

How to create online forms in word the maximum has been reached, the call is disconnected.

Configure one or more dialer interfaces. All configuration settings specific how to create a website in photoshop cs6 the destination go into the dialer interface configuration. Optional Configure a map-class to specify different characteristics for different types of calls on a per-call-destination basis. Refer to the section Configuring the map-class dialer Command for more information.

Note: If every incoming connection through this physical interface is not bound using CLID or DNIS, then you must configure encapsulation pppppp authentication and ppp multilink if applicable on the physical interface.

To avoid contention within a dialer pool, you can prioritize the dialer pool's physical diwler. Use the dialer remote-name user-name command to specify the remote destination. This is the remote router name passed for authentication.

Use the dialer string string command to specify the number to dial for outbound calls. If necessary, you can configure a map-class. Use the dialer caller lookup command to specify the CLID of the peer. Use the dialer pool number command to bind a dialer interface to a dialer pool. Note that a dialer interface can only be associated with one dialer pool, but a dialer pool can be associated with many dialer intrrface. The dialer-group group-number command is used to reference a dialer list which defines the "interesting" traffic.

You can cialer the map-class dialer class-name command to specify a map-class and enter the map-class configuration mode. The table below shows the options:. Note: 64 Kbps is the default. The speed parameter is used eialer with 56 Kbps line speed; 64 is not a valid option.

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Sep 15,  · Dialer interface - A logical entity that defines a user-specific dialer profile. All configuration settings specific to the user go under the dialer interface configuration; for example, the Layer 3 protocol addresses, interesting traffic, timeouts. Dialer interfaces are the logical interface binded with physical ledidatingstory.com can be used two ways, dialer profile and rotary-groups. Dialer Profile: Pl visit following url for more information. ledidatingstory.com#overview. Rotary-groups:: Pl. . 2. interface dialer number Enter interface configuration mode for the dialer interface. 3. ip address negotiated Specify that the IP address for a particular interface is obtained via PPP/IPCP address negotiation. 4. dialer-pool number Specify the dialer pool to use to .

Trying to get a better understanding of Dialer Interfaces. I know these can be used with protocols such as PPP, but I still have some questions like:.

Go to Solution. Physical interfaces cannot do authentication. Or are they still considered a "modern" type of interface? I've seen Dialer Groups configured on Cellular interfaces before, but there was no Dialer Interface configured on the router. View solution in original post. Dialer interfaces had been introduced in the dial-up era and in ISDN access, they provide an abstraction layer from the physical interfaces that actually perform the dial-up.

In the past this was useful for example to add additional B channels 64 kbps each to a connection based on traffic usage for example.

As answered above they come from the old telephony days but they have found application in broadband access so they are still in use and not only legacy. Yes a cellular interface is treated like an async serial and this should be the reason you can use dialer group on them.

Thank you both for your quick replies! I understand Dialer Interfaces much better now. Thanks again! Buy or Renew. Find A Community. Cisco Community. Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for. Search instead for. Did you mean:. All Community This category This board. Dialer Interfaces - trying to understand. Hello all, Trying to get a better understanding of Dialer Interfaces. I know these can be used with protocols such as PPP, but I still have some questions like: What is the point of using Dialer interfaces, i. Are Dialer interfaces just a holdover from the old telephony days, and we've just found new ways to use them today? This may be answered from the above question answers, but can Dialer interfaces be used with other protocols besides PPP?

Can Dialer Groups be used without Dialer Interfaces? Thanks in advance! Labels: Labels: Other Routing. I have this problem too. All forum topics Previous Topic Next Topic. Accepted Solutions. Georg Pauwen.

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