4000 Router Series Layer 2 - WAN Configuration Guide

[RouterB-Serial1/0:15] dialer circular enable

[RouterB-Serial1/0:15] dialer route ip 202.38.154.1 8810152

[RouterB-Serial1/0:15] dialer-group 1

3. Verify the configuration:

a. Ping 202.38.154.2 on Router A to trigger a call. The log shows that the line for a B channel

on E1 1/0 is up.

b. Ping 202.38.154.2, and the attempt succeeds. No packet is lost.

Configuration example for connecting devices through ISDN

BRI lines running NI

Network requirements

As shown in Figure 31, Router A is connected to Router B through the NI protocol of ISDN BRI lines.

Figure 31 Network diagram

Configuration procedure

In this example, the ISDN BRIs on both Router A and Router B operate in user side mode (the default),

and the interfaces on the device that connect to Router A and Router B in the ISDN network operate in

network side mode.

1. Configure Router A:

# Create dialer access group 1 and configure a dial access rule to trigger calls for IP packets.

<RouterA> system-view

[RouterA] dialer-group 1 rule ip permit

# Assign interface BRI 2/0 an IP address, enable C-DDR on the interface, dial 8810154 to set up

a link for packets destined to host address 202.38.154.2, and add the interface to dialer access

group 1.

[RouterA] interface bri 2/0

[RouterA-Bri2/0] ip address 202.38.154.1 255.255.0.0

[RouterA-Bri2/0] dialer circular enable

[RouterA-Bri2/0] dialer route ip 202.38.154.2 8810154

[RouterA-Bri2/0] dialer-group 1