R0106-HP MSR Router Series Layer 2 - WAN Configuration Guide(V7)

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[RouterA] line tty1
[RouterA-line-tty1] modem enable both
[RouterA-line-tty1] quit
[RouterA] line tty2
[RouterA-line-tty2] modem enable both
2. Configure Router B:
# Create dialer group 1 and configure a dial rule for it.
<RouterB> system-view
[RouterB] dialer-group 1 rule ip permit
# Configure interface Serial 2/1/0 to operate as an asynchronous interface in protocol mode.
[RouterB] interface serial 2/1/0
[RouterB-Serial2/1/0] physical-mode async
[RouterB-Serial2/1/0] async-mode protocol
# Configure an IP address for interface Serial 2/1/0.
[RouterB-Serial2/1/0] ip address 100.1.1.2 255.255.255.0
# Enable traditional DDR on the interface.
[RouterB-Serial2/1/0] dialer circular enable
# Associate dialer group 1 with the interface.
[RouterB-Serial2/1/0] dialer-group 1
# Configure two dial strings for calling Router A.
[RouterB-Serial2/1/0] dialer route ip 100.1.1.1 8810048
[RouterB-Serial2/1/0] dialer route ip 100.1.1.1 8810049
[RouterB-Serial2/1/0] quit
# Enable modem dial-in and dial-out on the user line to be used.
[RouterB] line tty1
[RouterB-line-tty1] modem enable both
3. Configure Router C:
# Create dialer group 1 and configure a dial rule for it.
<RouterC> system-view
[RouterC] dialer-group 1 rule ip permit
# Configure interface Serial 2/1/0 to operate as an asynchronous interface in protocol mode.
[RouterC] interface serial 2/1/0
[RouterC-Serial2/1/0] physical-mode async
[RouterC-Serial2/1/0] async-mode protocol
# Configure an IP address for interface Serial 2/1/0.
[RouterC-Serial2/1/0] ip address 100.1.1.3 255.255.255.0
# Enable traditional DDR on the interface.
[RouterC-Serial2/1/0] dialer circular enable
# Associate dialer group 1 with the interface.
[RouterC-Serial2/1/0] dialer-group 1
# Configure two dial strings for calling Router A.
[RouterC-Serial2/1/0] dialer route ip 100.1.1.1 8810048
[RouterC-Serial2/1/0] dialer route ip 100.1.1.1 8810049
[RouterC-Serial2/1/0] quit
# Enable modem dial-in and dial-out on the user interface to be used.