MSR930-LM 3G拨号不成功经验案例

某高速公路收费站配置3G的VPDN应用，发现20多个站点都能正常拨号成功，只有一个站点拨号始终失败，客户反馈所有站点均使用我司的MSR930设备

客户现场配置：

version 5.20, Release 2513P31

interface Cellular-Ethernet1/0

 ip address cellular-allocated

 dialer enable-circular

 dialer-group 1

 dialer number #777

 nat outbound

#

 ip route-static 0.0.0.0 0.0.0.0 Cellular-Ethernet1/0

profile create 1 static jxgsbf.vpdn.jx authentication-mode xxx                //此配置不显示

查看相关的配置，发现在配置上没什么问题，查看display cell结果为：

===============_display cellular all===============

=========================================================

Error: Modem not present.

Modem State:

Hardware Information

====================

Model = DM11-2

Manufacturer = Wistron NeWeb Corp.

Modem Firmware Version = DM11-2-M9615ACETWMLZD45343175  1  [Feb  2 2015 16:46:58]

International Mobile Equipment Identity (IMEI) = 354083060318167

International Mobile Subscriber Identity (IMSI) = 204043641115814

Hardware Version = 20004

Modem Status = Online

Profile Information

====================

Profile index = 1

PDP Type = IPv4v6, Header Compression = OFF

Data Compression = OFF

Access Point Name (APN) = jxgsbf.vpdn.jx

Authentication = CHAP

Username = jxgsbflu@jxgsbf.vpdn.jx

* - Default profile

Network Information

====================

Current Service Status = Limited Regional Service

Registration Status = Searching

Current Roaming Status = Roaming

Current Data Bearer Technology = Unknown

Network Selection Mode = Automatic

Mobile Country Code (MCC) = 460

Mobile Network Code (MNC) = 20

Radio Information

====================

Technology Preference = No preference specified (AUTO)

Technology Selected = GSM

GSM related info

------------------

Current RSSI = -70 dBm

Modem Security Information

====================

PIN Verification = Disabled

PIN Status = PIN Requirement Disabled

Number of PIN Retries Remaining = 3

Number of PUK Retries Remaining = 10

SIM Status = OK

然后对比其他拨号成功站点的配置，发现其他站点使用的拨号接口均为cellular1/0，而非CE接口，于是修改本设备的接口模式：

[H3C]Card-mode slot 1 ppp   配置完成后，再次对接口cellular1/0进行操作，但是又会报如下错误：

profile create 1 static jxgsbf.vpdn.jx authentication-mode none
Error: Running a different mode with the modem.

此报错类型说明，此设备的modem并不支持修改为PPP模式，只能在CE接口下进行配置，至此，怀疑是Modem类型差异，经过对比

拨号失败的设备：

  ===============_display cellular all===============

=========================================================

Error: Modem not present.

Modem State:

Hardware Information

====================

Model = DM11-2

拨号成功的设备：

  ===============_display cellular all===============

=========================================================

Error: Modem not present.

Modem State:

Hardware Information

====================

Model = EM660

经查询：

现场MSR930-LM的自带DM11-2 modem不支持电信3G，可以支持电信4G，建议现场更换为4G卡，或者更坏支持电信3G的MSR930设备