User Manual - Configuration Guide (Volume 3)

Chapter 1

Versatile Routing Platform

DDR Configuration

VI. Check whether synchronous/asynchronous serial port is correctly configured as asynchronous mode, and whether Modem is configured

The synchronous/asynchronous serial port must be configured first into asynchronous interface and configured with Modem configuration command, before any DDR configuration can proceed. If the dial configuration command is invisible on synchronous/asynchronous serial port, a frequent cause is that the synchronous/asynchronous serial port has not been configured as asynchronous interface. Now the dial configuration command will be visible, by running the following two configuration commands under this synchronous/asynchronous serial port configuration:

Quidway(config-if-SerialX)# physical-layer async

Quidway(config-if-SerialX)# modem

VII. Check whether synchronous/asynchronous serial port is bound to logical dial interface or directly enables DDR

The synchronous/asynchronous serial port has to be bound to logical dial interface or directly enable DDR, then it can be used in dial connection.

The configuration command for synchronous/asynchronous serial port to directly enable DDR dialer in-band, as shown in the following example (bold-typed):

Quidway(config)# dialer-list 1 protocol ip permit

Quidway(config)# interface serial 0

Quidway(config-if-Serial0)# physical-layer async

Quidway(config-if-Serial0)# modem

Quidway(config-if-Serial0)# ip address 100.1.1.3 255.255.255.0

Quidway(config-if-Serial0)# dialer in-band

Quidway(config-if-Serial0)# dialer-group 1

Quidway(config-if-Serial0)# dialer map ip 100.1.1.1 8810054

The configuration command to bind synchronous/asynchronous serial port to logical dial interface:

The configuration command under Legacy DDR configuration is dialer rotary-group, as shown in the following example (bold-typed part):

Quidway(config)# dialer-list 1 protocol ip permit

Quidway(config)# interface dialer 0

Quidway(config-if-Dialer0)# ip address 100.1.1.1 255.255.255.0

Quidway(config-if-Dialer0)# dialer in-band

Quidway(config-if-Dialer0)# dialer-group 1

Quidway(config-if-Dialer0)# dialer map ip 100.1.1.2 8810055

Quidway(config-if-Dialer0)# dialer map ip 100.1.1.3 8810048

Quidway(config-if-Dialer0)# interface serial 0

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