[SRX] SRX device can't find LTE SIM card after card is unplugged and plugged back in

Summary:

This article clarifies that if you unplug an LTE SIM card from an SRX device, you need to reboot the device for it to detect the SIM card again; otherwise, the device will not detect it.

Symptoms:

Initially, the LTE SIM card works well. However, when the customer unplugs the card and plugs it back in to the SRX device, the device is not detecting the LTE SIM card.

start shell user root
 vty fwdd

[Tue Feb 25 20:39:29.833 LOG: Debug] mlte_handle_lte_event: handle event 8
[Tue Feb 25 20:39:29.833 LOG: Info] LTE event: Connection attempt: SIM 1, attempt 3, SIM not found.

Observe that the card is not being detected in the above output.

Cause:

Both the LTE mPIM and SIM card are not hot swappable. If you unplug the SIM card from the SRX mPIM and re-plug it, you have to reboot the SRX device so that the device detects the SIM card.

Solution:

To enable the SRX device to detect the LTE SIM card, reboot the device. After reboot, observe that the SRX device can detect the SIM card successfully.

root@jtac-lab> show modem wireless network cl-1/0/0
LTE Connection details
Connected time: 270
IP: 10.78.214.144
Gateway: 10.78.214.145
DNS: 172.26.38.1
IPv6: 2600:380:7056:96f3:96f7:adff:fef3:f7dd
Gatewayv6: 2600:380:7056:96f3:f896:dfff:fec8:7dce
DNSv6: ::
Input bps: 0
Output bps: 0
Bytes Received: 2828
Bytes Transferred: 3080
Packets Received: 27
Packets Transferred: 30
Wireless Modem Network Info
Current Modem Status: Connected
Current Service Status: Normal
Current Service Type: PS
Current Service Mode: LTE
Current Band: B12
Network: ATT
Mobile Country Code (MCC): 310
Mobile Network Code (MNC): 410
Location Area Code (LAC): 65534
Routing Area Code (RAC): 0
Cell Identification: 108701711
Access Point Name (APN): broadband
Public Land Mobile Network (PLMN): ATT
Physical Cell ID (PCI): 408
International Mobile Subscriber Identification (IMSI): 310410825488235
International Mobile Equipment Identification (IMEI/MEID): 359072062651571
Integrate Circuit Card Identity (ICCID): 89014103278254882353
Reference Signal Receiving Power (RSRP): -111
Reference Signal Receiving Quality (RSRQ): -14
Signal to Interference-plus-Noise Ratio (SiNR): N/A
Signal Noise Ratio (SNR): -4
Energy per Chip to Interference (ECIO): 0

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