C-Dcc Application - 3Com MSR 50 Series Configuration Manual

180 C 6: DCC C
HAPTER ONFIGURATION

C-DCC Application

"Router-to-PC Callback with DCC" on page 198
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"NT Server-to-Router Callback with DCC" on page 200
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"Circular Dial String Backup and Internet Access with DCC" on page 202
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Network requirements
On a network segment are located three routers: Router A with the IP address of
100.1.1.1/24, Router B with the IP address of 100.1.1.2/24, and Router C with the
IP address of 100.1.1.3/24.
Configure C-DCC to allow Router A to call Router B and Router C from multiple
interfaces while disabling Router B and Router C from calling each other.
Network diagram
Figure 22 Network diagram for a C-DCC application
S 2/0
Router A
S 2/1
Dialer 0
100 .1 .1.1/24
Configuration procedure
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 Dialer0, associate dialer access group 1 with the
interface, enable C-DCC, and configure dial strings for calling Router B and Router
C.
[RouterA] interface dialer 0
[RouterA-Dialer0] dialer enable-circular
[RouterA-Dialer0] ip address 100.1.1.1 255.255.255.0
[RouterA-Dialer0] dialer-group 1
[RouterA-Dialer0] dialer route ip 100.1.1.2 8810052
[RouterA-Dialer0] dialer route ip 100.1.1.3 8810063
[RouterA-Dialer0] quit
# Set interface Serial 2/1 to work in asynchronous protocol mode and assign it to
dialer circular group 0.
Modem
8810048 8810052
PSTN
8810049 8810063
Modem
Router B
S2/0
100 .1 .1.2/24
Modem
Modem
Router C
S2/0
100 .1 .1.3/24