Huawei v200r001 user manual Troubleshooting with DDR Debugging Information

User Manual - Configuration Guide (Volume 3)	Chapter 1
Versatile Routing Platform	DDR Configuration

1)Hardware

zWhether modem is connected correctly.

zWhether modem is initialized correctly, whether it is set as non-automatic answer. Refer to Modem section of this manual for details.

zWhether the telephone line is connected correctly.

6)Software

zIf the interface is synchronous/asynchronous, it is not set as asynchronous mode.

zThe modem in and modem out commands are not configured.

zDDR is not enabled.

Fault 3: when the Modem is connected, the opposite party still cannot be pinged through.

Troubleshooting: the cause may be one of the followings:

zWhether the encapsulation of two ends is consistent.

zIf encapsulation ppp is used, whether the authentication is configured correctly at both ends.

zDDR is not enabled.

zThe receiving end is configured with dialer map, but there is no dialer map matching the calling end.

1.8.3Troubleshooting with DDR Debugging Information

I.How to acquire DDR debugging information

Execute the following commands in privileged user mode, to see DDR debugging information:

Quidway# debug dialer event Quidway# debug dialer packet Quidway(config)# logging on

II.The debugging information displayed when DDR can interwork with the opposite end

Information displayed at the calling end:

DDRtry to find routing to 100.1.1.2 on interface Serial0 DDRit is an interesting packet

DDRFind a dialer map matching the address

DDRTry to find a free channel to dial 8810052on the interface DDRDialing 8810052 on interface Serial0 of interface Serial0 DDREnqueue this packet

DDRtry to find routing to 100.1.1.2 on interface Serial0 DDRit is an interesting packet

DDRFind a dialer map matching the address

DDRA link is connecting by this dialer map, waiting this link DDREnqueue this packet

DDRtry to find routing to 100.1.1.2 on interface Serial0 DDRit is an interesting packet

DDRFind a dialer map matching the address

DDRA link is connecting by this dialer map, waiting this link DDREnqueue this packet

DDRtry to find routing to 100.1.1.2 on interface Serial0 DDRit is an interesting packet

DDRFind a dialer map matching the address

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