Configuring a Dialer Interface (Required)

Navigate to the Interfaces level in the configuration hierarchy.

1. In the configuration editor hierarchy, select Configuration>View and Edit>Edit Configuration.
2. Next to Interfaces, click Configure or Edit.

From the top of the configuration hierarchy, enter

edit interfaces

Create the new interface—for example, dl0.

Adding a description can differentiate between different dialer interfaces—for example, T1–backup.

1. Next to Interface, click Add new entry.
2. In the Interface name box, type dl0.
3. In the Description box, type T1–backup.
4. Click OK.

Create and name the interface:

1. edit dl0
2. set description T1–backup

Configure encapsulation options—for example, cisco-hdlc.

• cisco-hdlc—Cisco-compatible High-Level Data Link Control is a group of protocols for transmitting data between network points.
• ppp—Point-to-Point Protocol is a protocol used for communication between two computers using a serial interface.

1. In the Encapsulation column, next to the new interface, click Edit.
2. From the Encapsulation list, select cisco-hdlc.

Enter

set encapsulation cisco-hdlc

Enter a hold-time value in milliseconds—for example, 60. The hold-time value is used to damp interface transitions. When an interface goes from up to down, it is not advertised as down to the rest of the system until it remains down for the hold-time period. Similarly, an interface is not advertised as up until it remains up for the hold-time period. The hold time is three times the interval at which keepalive messages are sent.

1. In the Hold time section, type 60 in the Down box.
2. In the Up box, type 60.

1. Enter

   set hold-time down 60

2. Enter

   set hold-time up 60

Create the logical unit—for example, 0.

Note:

You can set the logical unit to 0 only, unless you are configuring the dialer interface for Multilink PPP encapsulation.

1. Next to Unit, click Add new entry.
2. In the Interface unit number box, type 0.
3. Next to Dialer options, select Yes, and then click Configure.

Enter

set unit 0

Configure dialer options.

• Activation delay—Time to wait before activating the backup interface once the primary interface is down—for example, 30. Default value is 0 seconds with a maximum value of 60 seconds. Use only for dialer backup and dialer watch.
• Deactivation delay—Time to wait before deactivating the backup interface once the primary interface is up—for example, 30. Default value is 0 seconds with a maximum value of 60 seconds. Use only for dialer backup and dialer watch.
• Idle timeout—Time a connection is idle before disconnecting—for example, 30. Default value is 120 seconds with a range from 0 to 4294967295.
• Initial route check—Time to wait before checking if the primary interface is up—for example, 30. Default value is 120 seconds with a range of 1 to 300 seconds.
• Pool—Name of a group of ISDN interfaces configured to use the dialer interface—for example, 3.
• Redial delay—Number of seconds to wait before redialing an incoming ISDN call. Default value is 3 seconds with a range from 2 to 255.

1. In the Activation delay box, type 60.
2. In the Deactivation delay box, type 30.
3. In the Idle timeout box, type 30.
4. In the Initial route check box, type 30.
5. In the Pool box, type 3.
6. In the Redial delay box, type 5.

1. Enter

   edit unit 0 dialer-options

2. Enter

   set activation-delay 60

3. Enter

   set deactivation-delay 30

4. Enter

   set idle-timeout 30 initial-route-check 30 pool 3

5. Enter

   set redial-delay 5

Configure the remote destination to call—for example, 5551212.

1. Next to Dial string, click Add new entry.
2. In the Dial string box, type 5551212.
3. Click OK.

Enter

set dial-string 5551212

Configure source and destination IP addresses for the dialer interface—for example, 172.20.10.2 and 172.20.10.1.

Note:

Ensure that the same IP subnet address is not configured on different dialer interfaces. Configuring the same IP subnet address on different dialer interfaces can result in inconsistency in the route and packet loss. Packets can be routed through any of the dialer interfaces with the IP subnet address, instead of being routed through the dialer interface to which the ISDN call is mapped.

1. Select Inet under Family, and click Edit.
2. Next to Address, click Add new entry.
3. In the Source box, type 172.20.10.2.
4. In the Destination box, type 172.20.10.1.
5. Click OK.

1. From the top of the configuration hierarchy, enter

   edit interfaces dl0 unit 0

2. Enter

   set family inet address 172.20.10.2

3. Enter

   set family inet address 172.20.10.2 destination 172.20.10.1