Configuring Dialer Interfaces (Required)

Navigate to the Interfaces level in the configuration hierarchy.

1. In the J-Web interface, select Configuration>View and Edit>Edit Configuration.
2. Next to Interfaces, click Configure or Edit.

From the [edit] hierarchy level, 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—For normal mode (when the router is using only one B-channel). Cisco-compatible High-Level Data Link Control is a group of protocols for transmitting data between network points.
• PPP—For normal mode (when the router is using only one ISDN B-channel per call). Point-to-Point Protocol is for communication between two computers using a serial interface.
• Multilink PPP—For multilink mode, when the router is using multiple B-channels per call. Multilink Point-to-Point Protocol (MLPPP) is a protocol for aggregating multiple constituent links into one larger PPP bundle. You can bundle up to eight B-channels.

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 unavailable for the hold-time period. Similarly, an interface is not advertised as up until it remains operational 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. This option is used only to configure a dialer filter.
• 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. This option is used only to configure dialer watch.
• Pool—Name of a group of ISDN interfaces configured to use the dialer interface—for example, isdn-dialer-group.
• Redial delay—Number of seconds to wait before redialing a failed outgoing 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 Pool box, type isdn-dialer-group.
4. 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 pool isdn-dialer-group

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. (The destination IP address is optional.)

Note: If you configure multiple dialer interfaces, ensure that the same IP subnet address is not configured on different dialer interfaces. Configuring the same IP subnet address on multiple dialer interfaces can result in inconsistency in the route and packet loss. The router might route packets through another dialer interface with the IP subnet address instead of through the dialer interface to which the ISDN modem 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 [edit] hierarchy level, enter

   edit interfaces dl0 unit 0

2. Enter

   set family inet address 172.20.10.2 destination 172.20.10.1