Network problems

Use this information to resolve issues related to networking.

Cannot wake server using Wake on LAN

Complete the following steps until the problem is resolved:
  1. If you are using the dual-port network adapter and the server is connected to the network using Ethernet 5 connector, check the system-error log or IMM2 system event log (see Event logs), make sure:
    1. Fan 3 is running in standby mode, if Emulex dual port 10GBase-T embedded adapter is installed.

    2. The room temperature is not too high (see Specifications).

    3. The air vents are not blocked.

    4. The air baffle is installed securely.

  2. Reseat the dual-port network adapter.

  3. Turn off the server and disconnect it from the power source; then, wait 10 seconds before restarting the server.

  4. If the problem still remains, replace the dual-port network adapter.

Could not log in using LDAP account with SSL enabled

Complete the following steps until the problem is resolved:
  1. Make sure that the license key is valid.

  2. Generate a new license key and log in again.

Server could not connect to the Wi-fi

Complete the following steps until the problem is resolved:

  1. Log into Lenovo XClarity Controller (change password for the first-time log in). Enable Wi-Fi Connectivity and input the information of the existing Wifi.

    Note: Server supports WPA2 only.
    Figure 1. Network setting
    Network setting
  2. If server still cannot connect to the Wi-fi, repeat step one or check if WLAN module is enabled by using the command through OpenWRT:

    dmesg | grep RTW

    See example:

    oper@OpenWrt:/etc/config$ dmesg | grep RTW
    RTW: module init start
    RTW: rtl88x2be v5.2.21.5_30361.20181019
    RTW: build time: May 30 2019 04:00:44
    RTW: rtl88x2be BT-Coex version = COEX20180824-6666
    RTW: rtw_inetaddr_notifier_register
    RTW: Memory mapped space start: 0x4040000000 len:00010000 flags:00140204, after map:0xffff00000e2d0000
    RTW: CHIP TYPE: RTL8822BE
    RTW: Bus master is enabled. usPciCommand=7
    RTW: PCIe Header Offset =70
    RTW: PCIe Capability =2
    Link Control Register =40
    RTW: Clock Request =0
    

Sever could not be set as WLAN AP mode

Complete the following steps until the problem is resolved:

  1. Log into Lenovo XClarity Controller (change password for the first-time log in). Enable Wi-Fi Connectivity and input the information of AP mode.

    Note: Server supports WPA2 only.
    Figure 2. Network setting
    Network setting
  2. If server still cannot work in AP mode, repeat step one or check the AP mode status by using the command through OpenWRT:

    sudo uci show wireless

    For example:

    oper@OpenWrt:/tmp$ sudo uci show wireless
    wireless.radio0=wifi-device
    wireless.radio0.type='mac80211'
    wireless.radio0.channel='11'
    wireless.radio0.hwmode='11n'
    wireless.radio0.path='soc/3400000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0'
    wireless.radio0.disabled='0'
    wireless.radio0.htmode='HT40'
    wireless.radio0.country='TW'
    wireless.default_radio0=wifi-iface
    wireless.default_radio0.device='radio0'
    wireless.default_radio0.network='wifi_lan_ap'
    wireless.default_radio0.mode='ap'
    wireless.default_radio0.ssid=' SE350_ap3'
    wireless.default_radio0.encryption='psk2'
    wireless.default_radio0.key='password'
    wireless.default_radio0.maxassoc='8'
    oper@OpenWrt:/tmp$
    

LTE connection failed

Complete the following steps until the problem is resolved:

  1. Log into Lenovo XClarity Controller (change password for the first-time log in). Enable LTE Connectivity and apply the change.

    Figure 3. Network setting
    Network setting
  2. To check if LTE module is successfully enabled, connect the server to OpenWRT via SSH (default = 192.168.70.254) and use the command below:

    oper@OpenWrt:/tmp$ sudo ifconfig

    It shows wwan0 if LTE module is successfully enabled. For example:

    oper@OpenWrt:/tmp$ sudo ifconfig 
    …
    wwan0     Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
                      inet addr:10.0.148.227  P-t-P:10.0.148.227  Mask:255.255.255.248
                      inet6 addr: fe80::244a:5b3e:11a9:aee7/64 Scope:Link
                     UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
                     RX packets:110700 errors:0 dropped:0 overruns:0 frame:0
                     TX packets:45977 errors:0 dropped:0 overruns:0 carrier:0
                     collisions:0 txqueuelen:1000
                      RX bytes:160842733 (153.3 MiB)  TX bytes:2001645 (1.9 MiB)

Config LTE in Linux

Complete the following steps until the problem is resolved:

  1. QMI mode is required for LTE mode in Linux. Connect the server to OpenWRT via SSH (default = 192.168.70.254) and use the command below:

    sudo usbmode_switch_telit_openwrt.sh

For example:

oper@OpenWrt:/tmp$ sudo usbmode_switch_telit_openwrt.sh
/sys/bus/usb/devices/2-1
LN940 at MBIM mode, change to QMI mode.
oper@OpenWrt:/tmp$ sudo reboot

LTE setup checklist for Lenovo service

Complete the check list below until the problem is resolved:

  1. Section Check item and detail
    HW

    LTE antennas are installed properly at correct locations

    Antenna cable are well connected on the LTE module

    SE350 support only 4G(LTE). (3G and 5G are not supported)

    USIM is installed properly into SIM holder of wireless adaptor card.

    Make sure to remove AC power adaptor from SE350 system before any installation or removal.

    FW

    XCC, UEFI and Switch board FW are upgraded to the latest version

    SIM

    SIM Selection

    Recommendation to use the below terms while you are checking your carrier.

    1. Carrier’s SIM should support for at least one of LTE band: 1,2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 21, 25, 26, 28, 29, 30, 38, 39, 40, 41,66

    2. SIM supports 4G(LTE)

    3. Form-factor is USIM only

    4. This SIM will be applicable on Laptop or Pad with supportive for data transmission supportive (no voice and SMS)

    5. IOT SIM: In general, IOT SIM & MVNO SIM are not suitable for SE350’s LTE application, but it depends on each division’s carriers.

    Note: SE350 is not compatible in Verizon SIM for now

    SIM Activation

    Bring the IMEI of SE350 to carrier to request for SIM activation. It is best proctice to check with local telecom operator (depends on different carrier policy , some policy might not need it).

    1. Check details with the carrier retail store

    2. Activate the SIM through phone to telecom service (or through SIM activation website).

    APN Setting

    Collect information from SIM card user manual. Generally, it includes information as below, some might have more.

    NAME, APN, PIN code, USER NAME, PASSWROD and Authentication method (CHAP or PAP)

    For example:
    • Name: SB

    • APN: plus.4g

    • UserNmae: plus

    • Password: 4g

    • authentication method: CHAP or PAP

    SE350 supports Open SIM model. For most cases, SE350 contains most common APN setting in default. By enable LTE into XCC_GUI or CLI WWAN, SE350 can be connected to telecom operators.

    PDP type default setting is IPV4, it is also the most common setting. For some carriers that change the PDP type to IPV4V6 or IPV6, it is best practice to check the setting with the selected supplier for PDP type requirement. Then, change to IPV4V6 or IPV6 through commands below:

    sudo uci set network.lte_wan.pdptype='IPV4V6' 
    sudo uci commit network
    sudo /etc/init.d/network restart
    sudo at_command.sh 'at+reset'
    Log files For more detail, see Log file

Register network with selected APN

For some special cases, it is possible to be unregistered from telecom operator. Then registered with your selected APN to network.

Command Lists as below.

AT+COPS=2  
AT+CGDCONT=1,"IPV4V6","<APN>"
AT+COPS=0  

Log file

Log files are collected by CLI commands below for SIM working status and Network Registration Status.

sudo at_command.sh 'at+cpin?'      /** Is SIM well-installed? Is PIN-CODE setting correct? **/ 
sudo at_command.sh 'AT+CIMI'      /** read IMSI **/
sudo uci show network |grep lte  /** check APN, user namve, password, auth, PDP type **/

Check Network Registration status:

'AT+CSQ'  /**search max RF signal quality between ‘device” and all “carriers “ around the device **/ 
'AT+COPS?' /** return wwan’s registered carrier and 4G tech if it’s successful to register to carrier **/    
'AT+CREG?'  /** report CS network registration status –2G/3G/4G **/
'AT+CEREG?' /**report EPS network registration status – 4G **/