Contents

Introduction

Prerequisites

Requirements

Components Used

Troubleshoot

Device not Attached to 5G Band

Confirm the Cellular Interface of the Device is not Assigned an IP Address

Confirm the Device Detects the SIM

Confirm the Device Actively Uses Required SIM

Verify the Modem Firmware is Updated and SIM Information is Populated

Check the Radio values

Valid Radio Ranges

Confirm Whether the PS State is Attached or not

Check Profile Configuration and Correct APN is in Use

Confirm that the Detected Network, MCC and MNC Values are Correct

Force Change to Correct MCC and MNC Values

Check the Available PLMNs

Related Information

Introduction

This document describes how to do prechecks on PIM module when it is deployed and to confirm that the cellular interface is assigned an IP address.

Prerequisites

Requirements

Cisco recommends that you have basic knowledge of these topics:

- 5G Cellular Network Basics

- Cisco P-5GS6-GL module

- Cisco IOS® XE and Cisco IOS® CG

Components Used

The information in this document is based on these software and hardware versions:

- Cisco C8300 with Cisco IOS® XE version 17.06.03a with a P-5GS6-GL module plugged in.

This applies to a P-5GS6-GL module connected to a router in a controller mode in SD-WAN.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, ensure that you understand the potential impact of any command.

Troubleshoot

Device not Attached to 5G Band

1. Ensure with the carrier that the acquired network plan is activated for 5G band.

2. Confirm with the carrier about 5G coverage area in the zone the 5G device is placed.

Confirm the Cellular Interface of the Device is not Assigned an IP Address

ISR#sh ip int brief

Interface              IP-Address      OK? Method Status                Protocol

GigabitEthernet0/0/0   172.16.173.10  YES other  up                    up

GigabitEthernet0/0/1   unassigned      YES unset  up                    up

Gi0/0/1.2989           10.10.22.74     YES other  up                    up

GigabitEthernet0/0/2   unassigned      YES unset  down                  down

GigabitEthernet0/0/3   10.244.182.1    YES other  up                    up

GigabitEthernet0/0/4   unassigned      YES unset  down                  down

GigabitEthernet0/0/5   unassigned      YES unset  down                  down

Cellular0/2/0          unassigned      YES IPCP   up                    up

Cellular0/2/1          unassigned      YES IPCP   administratively down down

Sdwan-system-intf      10.244.182.1    YES unset  up                    up

Loopback65528          192.168.1.1     YES other  up                    up

NVI0                   unassigned      YES unset  up                    up

Tunnel0                172.16.173.138  YES TFTP   up                    up

Tunnel2989001          10.10.22.74     YES TFTP   up                    up

Confirm the Device Detects the SIM

ISR#sh controllers cellular 0/X/0 details

Cellular Dual SIM details:

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

SIM 0 is present

SIM 1 is not present

SIM 0 is active SIM

ISR#sh cellular 0/X/0 security

Active SIM = 0

SIM switchover attempts = 0

Card Holder Verification (CHV1) = Disabled

SIM Status = OK

SIM User Operation Required = None

Number of CHV1 Retries remaining = 3

Confirm the Device Actively Uses Required SIM

ISR#sh controllers cellular 0/2/0 details

Cellular Dual SIM details:

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

SIM 0 is present

SIM 1 is not present

SIM 0 is active SIM

Verify the Modem Firmware is Updated and SIM Information is Populated

If the SIM information is not populated, ensure the SIM is inserted and not defective:

isr#show cellular 0/X/0 all

Hardware Information

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

Modem Firmware Version = M0H.020202

Host Firmware Version = A0H.000292

Device Model ID = FN980

International Mobile Subscriber Identity (IMSI) = XXXXXXXXXXXXXXX

International Mobile Equipment Identity (IMEI) = XXXXXXXXXXXXXXX

Integrated Circuit Card ID (ICCID) = XXXXXXXXXXXXXXXXXXXX

Mobile Subscriber Integrated Services

Digital Network-Number (MSISDN) = XXXXXXXXXX

*

*

Check the Radio values

If radio values are out of valid ranges, ensure all antennas are connected and not defective.

Valid Radio Ranges

RSSI: “Good” value is greater than -80 dBm (such as 79 is greater than -80)

RSRP: “Good” value is greater than -105 dBm (such as-104 is greater than -105)

RSRQ: “Good” value is greater than -12 dBm (such as 11 is greater than -12)

SNR: “Good” value is greater than 5 dBm (6 is better than 5)

The RSSI = -128 dBm usually means that the modem is down or the antennas are not connected. No radio signal at all.

Isr#sh cellular 0/2/0 radio

*

Current RSSI = -65 dBm

Current RSRP = -94 dBm

Current RSRQ = -12 dB

Current SNR = 8.4  dB

*

*

Confirm Whether the PS State is Attached or not

If PS state is not attached, make sure the correct APN is in use and provisioned on carrier side:

isr#sh cellular 0/2/0 network

Current System Time = Sun Jan 6 3:11:7 1980

Current Service Status = No service

Current Service = Unknown

Current Roaming Status = Home

Network Selection Mode = Automatic

Network = 420 212

Mobile Country Code (MCC) = 420

Mobile Network Code (MNC) = 4

Packet switch domain(PS) state = Not attached

Registration state(EMM) = Searching/Not Registered

EMM Sub State = No IMSI

Tracking Area Code (TAC) = 0

Cell ID = 0

Network MTU = Not Available

Check Profile Configuration and Correct APN is in Use

isr#show cellular 0/x/0 profile

Profile password Encryption level =  7

Profile 1 = INACTIVE* **

--------

PDP Type = IPv4

Access Point Name (APN) = SAMIS.M2M

Authentication = None

Profile 2 = INACTIVE

--------

PDP Type = IPv4v6

Access Point Name (APN) = ims

Authentication = None

Profile 5 = INACTIVE

--------

PDP Type = IPv4

Access Point Name (APN) = SAMIS.M2M

Authentication = None

* - Default profile

** - LTE attach profile

Configured default profile for active SIM 0 is profile 1.

Confirm that the Detected Network, MCC and MNC Values are Correct

isr#sh cellular 0/2/0 network

Current System Time = Sun Jan 6 3:11:7 1980

Current Service Status = No service

Current Service = Unknown

Current Roaming Status = Home

Network Selection Mode = Automatic

Network = 420 212

Mobile Country Code (MCC) = 420

Mobile Network Code (MNC) = 4

Packet switch domain(PS) state = Not attached

Registration state(EMM) = Searching/Not Registered

EMM Sub State = No IMSI

Tracking Area Code (TAC) = 0

Cell ID = 0

Network MTU = Not Available

If the values shown are incorrect, confirm using https://www.mcc-mnc.com/:

Force Change to Correct MCC and MNC Values

1. Shutdown the cellular interface:

conf t

int cellular 0/X/0

shut

2. Perform a PLMN search, this forces the modem search for available networks in the area:

cellular 0/X/0 lte plmn search    //This command is entered in PRIV mode, no config mode.

3. Once the PLMN search is completed, see the available networks with:

show cellular 0/X/0 network

4. Select the desired network with:

cellular 0/X/0 lte plmn select manual MCC MNC INDX RAT    //Enter the desired MCC,MNC,INDX and RAT from above output

5. To force select the desired network :

cellular 0/X/0 lte plmn select force MCC MNC INDX RAT   //Enter the desired MCC,MNC,INDX and RAT from above output

Check the Available PLMNs

isr#sh cellular 0/2/0 network

Current System Time = Tue Jan 8 23:43:48 1980

Current Service Status = No service

Current Service = Unknown

Current Roaming Status = Roaming

Network Selection Mode = Automatic

Network = Zain KSA

Mobile Country Code (MCC) = 420

Mobile Network Code (MNC) = 4

Packet switch domain(PS) state = Not attached

Registration state(EMM) = Not registered

EMM Sub State = Attach needed

Tracking Area Code (TAC) = 0

Cell ID = 0

Available PLMNs at  =  11:31:30 AST Thu Nov 21 2024

Idx MCC MNC RAT     Desc

1   420 1   lte     stc

2   420 3   lte     Mobily

3   420 4   lte     Zain KSA

Related Information

- Hardware Installation Guide

- Software configuration guide for PIM

- Modem Firmware Upgrade guide (CG and PIM)