Router-To-Router Callback With Dcc (Ppp Approach) - 3Com MSR 50 Series Configuration Manual

194 C 6: DCC C
HAPTER ONFIGURATION
Router-to-Router
Callback with DCC (PPP
Approach)
[RouterC-Bri1/0] dialer enable-circular
[RouterC-Bri1/0] dialer isdn-leased 1
Network requirements
Figure 28 presents a scenario where:
Router A and Router B are interconnected via serial interfaces across PSTN.
■
Interface Serial 2/0 on Router A is assigned the IP address of 100.1.1.1/24 and
■
interface Serial 2/0 on Router B is assigned the IP address of 100.1.1.2/24.
Implement PPP callback between Router A and Router B, specifying Router A as
the callback client and Router B as the callback server.
Network diagram
Figure 28 Network for DCC in router-to-router callback
Router A Modem
S2 /0
100 .1 .1.1/24
Callback
Client
Configuration procedure
Solution 1: Use C-DCC to implement PPP callback, allowing the callback server to
make callback decision based on usernames configured in the dialer route
commands.
1 Configure Router A
# Configure a dial access control rule for dialer access group 1.
<RouterA> system-view
[RouterA] dialer-rule 1 ip permit
# Assign an IP address to interface Serial 2/0, configure its physical layer and
C-DCC parameters.
[RouterA] interface serial 2/0
[RouterA-Serial2/0] ip address 100.1.1.1 255.255.255.0
[RouterA-Serial2/0] physical-mode async
[RouterA-Serial2/0] async mode protocol
[RouterA-Serial2/0] dialer enable-circular
[RouterA-Serial2/0] dialer-group 1
[RouterA-Serial2/0] dialer route ip 100.1.1.2 8810052
[RouterA-Serial2/0] link-protocol ppp
[RouterA-Serial2/0] ppp pap local-user usera password simple usera
# Specify interface Serial 2/0 as the callback client.
[RouterA-Serial2/0] ppp callback client
[RouterA-Serial2/0] dialer timer enable 15
[RouterA-Serial2/0] quit
# Configure the user interface to be used and enable modem dialup on it.
8810048 8810052
PSTN
Modem Router B
S2/0
100.1.1.2/24
Callback
Server