Check Connection

This scenario shows how to configure a cellular interface to use up to four separated data interfaces associated to different APNs. As a result, more than one data interface can be used to access the network.

Test ICMP Connectivity

Description

Four different cellular profiles are defined and a cellular interface with four PDP (Packet Data Protocol) contexts is created in DUT0. Once configured, the ‘Ping’ command is used to check the connectivity of all four data interfaces with Google’s public DNS server.

Scenario

Step 1: Set the following configuration in DUT0:

set cellular profile CELPROFILE1 apn oper_apn1.com
set cellular profile CELPROFILE2 apn oper_apn2.com
set cellular profile CELPROFILE3 apn oper_apn3.com
set cellular profile CELPROFILE4 apn oper_apn4.com
set interfaces cellular cell0 encrypted-pin U2FsdGVkX18Nny9JjQIoy58Axdykh931jN8HcqcHFss=
set interfaces cellular cell0 pdp 1 address dhcp
set interfaces cellular cell0 pdp 1 profile CELPROFILE1
set interfaces cellular cell0 pdp 2 address dhcp
set interfaces cellular cell0 pdp 2 profile CELPROFILE2
set interfaces cellular cell0 pdp 3 address dhcp
set interfaces cellular cell0 pdp 3 profile CELPROFILE3
set interfaces cellular cell0 pdp 4 address dhcp
set interfaces cellular cell0 pdp 4 profile CELPROFILE4
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Note

Once the cellular interface is configured, with the following operational command it can be checked if the SIM and registration states are correct.

Step 2: Run command interfaces cellular cell0 show network-status at DUT0 and check if output matches the following regular expressions:

SIM status\s* = OK
Registration state\s* = registered

Note

On the other hand, with the following commands it can be checked if all four cellular interfaces have correctly established the connection to the network.

Step 3: Run command interfaces cellular cell0 pdp 1 show network-data-connection at DUT0 and check if output matches the following regular expressions:

Connection status\s* = connected

Step 4: Run command interfaces cellular cell0 pdp 2 show network-data-connection at DUT0 and check if output matches the following regular expressions:

Connection status\s* = connected

Step 5: Run command interfaces cellular cell0 pdp 3 show network-data-connection at DUT0 and check if output matches the following regular expressions:

Connection status\s* = connected

Step 6: Run command interfaces cellular cell0 pdp 4 show network-data-connection at DUT0 and check if output matches the following regular expressions:

Connection status\s* = connected

Note

Additionally, with the previous operational commands, the IP addresses that have been provided by the operator to be used by each cellular interface are displayed. So, with the following commands, it can be checked if all four cellular interfaces have been correctly configured by the DHCP client.

Step 7: Run command interfaces cellular cell0 pdp 1 show at DUT0 and check if output matches the following regular expressions:

cell0s1\s+\d+.\d+.\d+.\d+\/\d+\s+up\s+up

Step 8: Run command interfaces cellular cell0 pdp 2 show at DUT0 and check if output matches the following regular expressions:

cell0s2\s+\d+.\d+.\d+.\d+\/\d+\s+up\s+up

Step 9: Run command interfaces cellular cell0 pdp 3 show at DUT0 and check if output matches the following regular expressions:

cell0s3\s+\d+.\d+.\d+.\d+\/\d+\s+up\s+up

Step 10: Run command interfaces cellular cell0 pdp 4 show at DUT0 and check if output matches the following regular expressions:

cell0s4\s+\d+.\d+.\d+.\d+\/\d+\s+up\s+up

Note

Once everything above has been verified, we can be sure that all four cellular interfaces have been configured correctly and that there must be connectivity with the network from each of them. The latter can be verified, for example, by pinging Google’s DNS public server.

Step 11: Ping IP address 8.8.8.8 from DUT0:

admin@DUT0$ ping 8.8.8.8 local-address cell0s1 count 1 size 56 timeout 1

Step 12: Ping IP address 8.8.8.8 from DUT0:

admin@DUT0$ ping 8.8.8.8 local-address cell0s2 count 1 size 56 timeout 1

Step 13: Ping IP address 8.8.8.8 from DUT0:

admin@DUT0$ ping 8.8.8.8 local-address cell0s3 count 1 size 56 timeout 1

Step 14: Ping IP address 8.8.8.8 from DUT0:

admin@DUT0$ ping 8.8.8.8 local-address cell0s4 count 1 size 56 timeout 1

Step 15: Run command interfaces cellular cell0 show cell-info at DUT0 and check if output matches the following regular expressions:

GSM\/EDGE info|UMTS info|LTE intrafrequency info|LTE interfrequency info|LTE info - Neighboring GSM|LTE info - Neighboring WCDMA|UMTS Cell ID|UMTS info - Neighboring LTE

Step 16: Run command interfaces cellular cell0 show device-info at DUT0 and check if output matches the following regular expressions:

Temperature\s* = \d+

Step 17: Run command interfaces cellular cell0 show preferred-bands at DUT0 and check if output matches the following regular expressions:

Bands preference\s* = .*\nLTE bands preference\s* = .*

Step 18: Run command interfaces cellular cell0 show signal-quality at DUT0 and check if output matches the following regular expressions:

(CDMA|EVDO|GSM\/GPRS|WCDMA|LTE):\n\s+RSSI \(dBm\)\s* = -?\d+

Step 19: Run command interfaces cellular cell0 show supported-bands at DUT0 and check if output matches the following regular expressions:

Bands\s* = .*\nLTE bands\s* = .*