How do I configure a 3G interface on an AR router

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When WCDMA is used, the procedure for configuring a 3G interface is as follows:
[Huawei] apn profile 3gprofile //Create an APN profile.
[Huawei-apn-profile-3gprofile] apn 3GNET
[Huawei-apn-profile-3gprofile] user name 3guser password cipher Password@123 authentication-mode auto
[Huawei-apn-profile-3gprofile] quit
[Huawei] dialer-rule //Configure a dialer ACL.
[Huawei-dialer-rule] dialer-rule 1 ip permit
[Huawei-dialer-rule] quit
[Huawei] interface cellular 0/0/0
[Huawei-Cellular0/0/0] link-protocol ppp
[Huawei-Cellular0/0/0] ip address ppp-negotiate //Configure an IP address through PPP negotiation.
[Huawei-Cellular0/0/0] ppp ipcp dns request //Configure a DNS server address through PPP negotiation.
[Huawei-Cellular0/0/0] dialer enable-circular //Enable C-DCC.
[Huawei-Cellular0/0/0] dialer-group 1 //Associate Cellular0/0/0 to the dialer access group.
[Huawei-Cellular0/0/0] dialer number *99# //Configure a dialer number for calling the remote end.
[Huawei-Cellular0/0/0] mode wcdma wcdma-precedence //Configure a network connection mode.
[Huawei-Cellular0/0/0] apn-profile 3gprofile //Bind the APN profile to the 3G cellular interface.
[Huawei-Cellular0/0/0] shutdown
[Huawei-Cellular0/0/0] undo shutdown
[Huawei-Cellular0/0/0] quit

When CDMA2000 is used, the procedure for configuring a 3G interface is as follows:
[Huawei] dialer-rule //Configure a dialer ACL.
[Huawei-dialer-rule] dialer-rule 1 ip permit
[Huawei-dialer-rule] quit
[Huawei] interface cellular 0/0/0
[Huawei-Cellular0/0/0] link-protocol ppp
[Huawei-Cellular0/0/0] ip address ppp-negotiate //Configure an IP address through PPP negotiation.
[Huawei-Cellular0/0/0] ppp ipcp dns request //Configure a DNS server address through PPP negotiation.
[Huawei-Cellular0/0/0] dialer enable-circular //Enable C-DCC.
[Huawei-Cellular0/0/0] dialer-group 1 //Associate Cellular0/0/0 to the dialer access group.
[Huawei-Cellular0/0/0] dialer number #777 //Configure a dialer number for calling the remote end.
[Huawei-Cellular0/0/0] mode cdma hybrid //Configure a network reconnection mode.
[Huawei-Cellular0/0/0] quit

Other related questions:
How to configure a sub-interface on an AR router
A sub-interface is a virtual interface configured on a physical interface. It is generally used for the communication between a physical link and multiple remote ends. Sub-interfaces include: Ethernet sub-interfaces, Eth-Trunk sub-interfaces, PON sub-interfaces, ATM sub-interfaces, and FR sub-interfaces. Configure a sub-interface as follows: [Huawei] interface ethernet 2/0/0 [Huawei-Ethernet2/0/0] undo portswitch //Switch the current interface to a Layer-3 interface. [Huawei-Ethernet2/0/0] quit [Huawei] interface ethernet 2/0/0.1 //Enter the view of the sub-interface.

How do I configure NQA on the AR router
The procedure for configuring NQA on the AR router is as follows: 1. Run the system-view command to enter the system view. 2. Run the nqa test-instance command to create an NQA test instance. 3. Run the test-type command to configure the type of the NQA test instance. 4. Configure mandatory parameters based on the type of the NQA test instance. (For the NQA test instance of ICMP, the destination IP address needs to be specified. For the NQA test instance of DHCP, the source interface for sending DHCP Request messages needs to be specified. For the NQA test instance of DNS, the destination domain name needs to be specified. 5. Configure optional parameters as needed, for example, test period and timeout interval. 6. Configure association. The NQA test instance can be associated with VRRP and static route.

Why do I fail to configure a sub-interface on an AR router
Before configuring a sub-interface, confirm that: - The physical interface corresponding to the sub-interface is connected properly. - The physical interface is switched to a Layer-3 interface. A sub-interface can be configured only on a Layer-3 interface that can be allocated with an IP address.

How do I locate the 3G dialup failure on an AR
Run the display cellular interface-number network command to check the value of the Current Service Status field. - When the value of the Current Service Status field is Service Available, the 3G service is available. Check the following configurations: 1. Check whether the dialer number is configured correctly. 2. If the 3G interface is connected to the WCDMA network or a network that is compatible with the WCDMA network, check whether the APN is configured correctly. 3. Check whether the authentication mode, user name, and password are configured correctly. 4. Check whether the dialer ACL is configured correctly. 5. Check whether static routes are configured correctly. - When the value of the Current Service Status field is No Service, the 3G service is unavailable. Check the following configurations: 1. If the 3G interface is connected to the WCDMA network or a network that is compatible with the WCDMA network, run the display cellular interface-number network command to check values of the Mobile Country Code (MCC), Mobile Network Code (MNC), and Mobile Operator Information fields and check whether the PLMN selected by the 3G modem is consistent with that of the carrier. If the 3G interface is connected to the CDMA2000 network or a network that is compatible with the CDMA2000 network, you can skip this step. 2. Run the display cellular interface-number radio command to check the value of the Current RSSI field. 3. Check whether the 3G data card is supported by the AR. 4. Run the display cellular interface-number radio command to check the value of the SIM Status field and check whether the SIM, USIM, or UIM card status is normal. 5. Check whether the 3G hardware (including the 3G data card/3G interface card/3G model), SIM/USIM/UIM card, or 3G antenna is damaged, not properly installed, or not fastened. 6. Check whether the angle of the 3G antennas is proper. 7. Check whether 3G/2G services are enabled on the SIM, USIM, or UIM card and whether the users owe fees. 8. Run the display cellular interface-number radio command to check the value of the PIN Status field.

Method used to configure IPSec on the 3G interface of the AR
Huawei AR series routers can dynamically obtain IP addresses from a service provider to access public network using a 3G interface, and establish IPSec connections with the headquarters. This function applies to V200R002C00 and later versions and all models of the AR. For details, see Typical Configuration Examples.

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