This article contains a practical collection of useful Juniper MX204 commands for checking PIC and FPC status, port capabilities, interface configuration, hardware inventory, alarms, power supplies and environmental sensors.
Check QSFP28 PIC and Port Capabilities
Display detailed information about PIC 0, including the installed transceiver and supported port speeds:
jkliachev@mx204> show chassis pic fpc-slot 0 pic-slot 0
FPC slot 0, PIC slot 0 information:
Type 4XQSFP28 PIC
State Online
PIC version 0.0
Uptime 761 days, 22 hours, 56 minutes, 6 seconds
PIC port information:
Fiber Xcvr vendor Wave- Xcvr JNPR MSA
Port Cable type type Xcvr vendor part number length Firmware Rev Version
0 100GBASE SR4 MM PRECISION PREQSFP28-AOC03M 850 nm 0.0 REV 01 SFF-8636 ver 2.7
Port speed information:
Port PFE Capable Port Speeds
0 0 4x10GE, 40GE, 100GE
1 0 4x10GE, 40GE, 100GE
2 0 4x10GE, 40GE, 100GE
3 0 4x10GE, 40GE, 100GE
Check SFP+ PIC
Display information about PIC 1, which provides the eight SFP+ ports:
jkliachev@mx204> show chassis pic fpc-slot 0 pic-slot 1
FPC slot 0, PIC slot 1 information:
Type 8XSFPP PIC
State Online
PIC version 0.0
Uptime 761 days, 22 hours, 56 minutes, 5 seconds
Check FPC and PIC Status
Use this command for a quick overview of the MPC and both PICs:
jkliachev@mx204> show chassis fpc pic-status
Slot 0 Online MPC
PIC 0 Online 4XQSFP28 PIC
PIC 1 Online 8XSFPP PIC
Activate 4x100G Ports Only
Example configuration with all four 100G ports enabled on PIC 0 and PIC 1 disabled:
jkliachev@mx204> show configuration chassis fpc 0 | display set
set chassis fpc 0 pic 0 pic-mode 100G
set chassis fpc 0 pic 0 tunnel-services bandwidth 100g
set chassis fpc 0 pic 0 number-of-ports 4
set chassis fpc 0 pic 1 number-of-ports 0
set chassis fpc 0 sampling-instance NETFLOW-INSTANCE
Check Junos Version
root@mx204> show version
Hostname: mx204
Model: mx204
Junos: 23.4R1.9
Check Chassis and System Alarms
Check both chassis-level and system-level alarms:
root@mx204> show chassis alarms
No alarms currently active
root@mx204> show system alarms
No alarms currently active
Activate 3x100G and 8x10G Ports
Example configuration with three 100G ports on PIC 0 and all eight 10G ports on PIC 1:
jkliachev@mx204> show configuration | display set | grep fpc
set chassis fpc 0 pic 0 tunnel-services bandwidth 100g
set chassis fpc 0 pic 0 port 0 speed 100g
set chassis fpc 0 pic 0 port 1 speed 100g
set chassis fpc 0 pic 0 port 2 speed 100g
set chassis fpc 0 pic 1 port 0 speed 10g
set chassis fpc 0 pic 1 port 1 speed 10g
set chassis fpc 0 pic 1 port 2 speed 10g
set chassis fpc 0 pic 1 port 3 speed 10g
set chassis fpc 0 pic 1 port 4 speed 10g
set chassis fpc 0 pic 1 port 5 speed 10g
set chassis fpc 0 pic 1 port 6 speed 10g
set chassis fpc 0 pic 1 port 7 speed 10g
Restart the FPC
After changing the physical port configuration, restart FPC 0:
root@mx204> request chassis fpc restart slot 0
Restart initiated, use "show chassis fpc" to verify
root@mx204>
Message from syslogd@mx204 at Apr 22 05:11:53 ...
mx204 fpc0 CMLC: Chassis Manager terminated
Check 100G and 10G Interfaces
Verify the resulting 100G and 10G interfaces after the FPC configuration:
root@mx204> show interfaces terse | match "et-0/0|xe-0/1"
et-0/0/0 up down
et-0/0/1 down down
et-0/0/2 up down
xe-0/1/0 up down
xe-0/1/1 up down
xe-0/1/2 up down
xe-0/1/3 up down
xe-0/1/4 up down
xe-0/1/5 up down
xe-0/1/6 up down
xe-0/1/7 up down
Check Hardware Inventory
Display the complete hardware inventory, including the chassis, Routing Engine, MPC, PICs, installed transceivers, power supplies and fan trays:
jkliachev@mx204> show chassis hardware
Hardware inventory:
Item Version Part number Serial number Description
Chassis FU424 JNP204 [MX204]
Routing Engine 0 BUILTIN BUILTIN RE-S-1600x8
CB 0 REV 44 750-069579 BCDL9816 JNP204 [MX204]
FPC 0 BUILTIN BUILTIN MPC
PIC 0 BUILTIN BUILTIN 4XQSFP28 PIC
Xcvr 0 REV 01 740-058734 AB231229A01 QSFP-100GBASE-SR4
PIC 1 BUILTIN BUILTIN 8XSFPP PIC
PEM 0 REV 04 740-070749 1F18C060446 JPSU-650W-AC-AO
PEM 1 REV 04 740-070749 1F18C060504 JPSU-650W-AC-AO
Fan Tray 0 Fan Tray, Front to Back Airflow - AFO
Fan Tray 1 Fan Tray, Front to Back Airflow - AFO
Fan Tray 2 Fan Tray, Front to Back Airflow - AFO
Check Power Supply Status
Display detailed information about both power supply modules, including temperature, fan speed, voltage, current, power consumption and load:
jkliachev@mx204> show chassis environment pem
PEM 0 status:
State Online
Airflow Front to Back
Temp Sensor 0 OK 31 degrees C / 87 degrees F
Temp Sensor 1 OK 30 degrees C / 86 degrees F
Firmware version 00.06
Fan Sensor 5970 RPM
DC Output Voltage(V) Current(A) Power(W) Load(%)
11.91 7.00 83 12
Health check Information:
Status: Unsupported
PEM 1 status:
State Online
Airflow Front to Back
Temp Sensor 0 OK 31 degrees C / 87 degrees F
Temp Sensor 1 OK 32 degrees C / 89 degrees F
Firmware version 00.06
Fan Sensor 5940 RPM
DC Output Voltage(V) Current(A) Power(W) Load(%)
11.86 7.00 82 12
Health check Information:
Status: Unsupported
jkliachev@mx204>
Check Temperatures and Fan Status
Display all main temperature sensors, power supply status and fan status:
jkliachev@mx204> show chassis environment
Class Item Status Measurement
Temp CB 0 Top Right Inlet Sensor OK 26 degrees C / 78 degrees F
CB 0 Top Left Inlet Sensor OK 26 degrees C / 78 degrees F
CB 0 Top Right Exhaust Sensor OK 34 degrees C / 93 degrees F
CB 0 Top Left Exhaust Sensor OK 50 degrees C / 122 degrees F
CB 0 CPU Core-0 Temp OK 37 degrees C / 98 degrees F
CB 0 CPU Core-1 Temp OK 37 degrees C / 98 degrees F
CB 0 CPU Core-2 Temp OK 36 degrees C / 96 degrees F
CB 0 CPU Core-3 Temp OK 36 degrees C / 96 degrees F
CB 0 CPU Core-4 Temp OK 35 degrees C / 95 degrees F
CB 0 CPU Core-5 Temp OK 35 degrees C / 95 degrees F
CB 0 CPU Core-6 Temp OK 36 degrees C / 96 degrees F
CB 0 CPU Core-7 Temp OK 35 degrees C / 95 degrees F
FPC 0 EA0_HMC0 Logic die OK 69 degrees C / 156 degrees F
FPC 0 EA0_HMC0 DRAM botm OK 66 degrees C / 150 degrees F
FPC 0 EA0_HMC1 Logic die OK 72 degrees C / 161 degrees F
FPC 0 EA0_HMC1 DRAM botm OK 69 degrees C / 156 degrees F
FPC 0 EA0 Chip OK 78 degrees C / 172 degrees F
FPC 0 EA0-XR0 Chip OK 55 degrees C / 131 degrees F
FPC 0 EA0-XR1 Chip OK 60 degrees C / 140 degrees F
Power PEM 0 OK 31 degrees C / 87 degrees F
PEM 1 OK 30 degrees C / 86 degrees F
Fans Fan Tray 0 Fan 0 OK Spinning at normal speed
Fan Tray 0 Fan 1 OK Spinning at normal speed
Fan Tray 1 Fan 0 OK Spinning at normal speed
Fan Tray 1 Fan 1 OK Spinning at normal speed
Fan Tray 2 Fan 0 OK Spinning at normal speed
Fan Tray 2 Fan 1 OK Spinning at normal speed