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[MX] Backup SPMB x not online on MX2008

0

1

Article ID: KB36290 KB Last Updated: 09 Nov 2020Version: 1.0
Summary:

On MX2008 Series routers that has two Next Generation Routing Engines installed running different Junos OS versions, the backup SPMB x may not come online after Routing Engine switchover. This issue is seen if the old primary RE's version is Junos OS Release 17.4R3, but NOT seen if the old primary RE's version is Junos OS Release 18.1R1 +.

This article clarifies that this is not a hardware issue, but a software one. If the Junos OS version is the same on both Routing Engines, the issue is not seen after RE switchover.

 

Symptoms:

The new backup SPMB 0 does not come online after RE switchover, if the old primary RE's version is Junos OS Release 17.4.

########## Junos version Master re0:17.4R3.16 / Backup re1:19.1R3.9 ##########

User@mx2008-re0> show system information
Model: mx2008
Family: junos
Junos: 17.4R3.16
Hostname: mx2008-re0

User@mx2008-re1> show system information
Model: mx2008
Family: junos
Junos: 19.1R3.9
Hostname: mx2008-re1

User@mx2008-re0> show chassis alarms
No alarms currently active

User@mx2008-re0> show chassis routing-engine
Routing Engine status:
  Slot 0:
    Current state                  Master
    Election priority              Master (default)
    CPU temperature             66 degrees C / 150 degrees F
    DRAM                      49108 MB (49152 MB installed)
    Memory utilization           5 percent
    5 sec CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     1 percent
      Interrupt                  0 percent
      Idle                      99 percent
    1 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     1 percent
      Interrupt                  0 percent
      Idle                      98 percent
    5 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     1 percent
      Interrupt                  0 percent
      Idle                      59 percent
    15 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     0 percent
      Interrupt                  0 percent
      Idle                      26 percent
    Model                          RE-MX2008-X8-64G
    Serial ID                      BUILTIN
    Start time                     2020-10-22 20:47:28 IST
    Uptime                         7 minutes, 22 seconds
    Last reboot reason             0x2000:hypervisor reboot
    Load averages:                 1 minute   5 minute  15 minute
                                       0.23       0.31       0.20
Routing Engine status:
  Slot 1:
    Current state                  Backup
    Election priority              Backup (default)
    CPU temperature             61 degrees C / 141 degrees F
    DRAM                      49104 MB (49152 MB installed)
    Memory utilization           5 percent
    5 sec CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     0 percent
      Interrupt                  0 percent
      Idle                     100 percent
    Model                          RE-MX2008-X8-64G
    Serial ID                      BUILTIN
    Start time                     2020-10-22 18:26:11 IST
    Uptime                         2 hours, 28 minutes, 40 seconds
    Last reboot reason             0x2000:hypervisor reboot
    Load averages:                 1 minute   5 minute  15 minute
                                       0.20       0.21       0.23

User@mx2008-re0> show chassis spmb
Slot 0 information:
  State                          Online
  Start time:                    2020-10-22 20:51:09 IST
  Uptime:                        3 minutes, 42 seconds
Slot 1 information:
  State                          Online - Standby
  Start time:                    2020-10-22 20:51:09 IST
  Uptime:                        3 minutes, 42 seconds

User@mx2008-re0> show chassis environment cb
CB 0 status:
  State                      Online Master
  Inlet1 Temperature         39 degrees C / 102 degrees F
  Inlet2 Temperature         44 degrees C / 111 degrees F
  Inlet3 Temperature         39 degrees C / 102 degrees F
  Inlet4 Temperature         40 degrees C / 104 degrees F
  Exhaust1 Temperature       40 degrees C / 104 degrees F
  Exhaust2 Temperature       46 degrees C / 114 degrees F
  Exhaust3 Temperature       43 degrees C / 109 degrees F
  Exhaust4 Temperature       43 degrees C / 109 degrees F
  Power 1
    1.0 V PHY                    995 mV
    1.15 V                      1153 mV
    1.2 V bias                  1195 mV
    1.5 V                       1501 mV
    1.8 V                       1801 mV
    2.5 V                       2468 mV
    3.3 V bias                  3296 mV
    VCCIO                       1040 mV
  Power 2
    1.1 V                       1099 mV
    3.3 V                       3300 mV
  Power 3
    0.95 V XL710                 919 mV
    1.05 V                      1050 mV
  Power 4
    1.2 V                       1199 mV
    5.0 V                       5000 mV
  Power 5
    1.0 V                       1000 mV
    1.2 V PHY                   1199 mV
  Bus Revision               116
  FPGA Revision              2
CB 1 status:
  State                      Online Standby
  Inlet1 Temperature         37 degrees C / 98 degrees F
  Inlet2 Temperature         41 degrees C / 105 degrees F
  Inlet3 Temperature         38 degrees C / 100 degrees F
  Inlet4 Temperature         39 degrees C / 102 degrees F
  Exhaust1 Temperature       37 degrees C / 98 degrees F
  Exhaust2 Temperature       43 degrees C / 109 degrees F
  Exhaust3 Temperature       42 degrees C / 107 degrees F
  Exhaust4 Temperature       42 degrees C / 107 degrees F
  Power 1
    1.0 V PHY                    986 mV
    1.15 V                      1150 mV
    1.2 V bias                  1189 mV
    1.5 V                       1488 mV
    1.8 V                       1788 mV
    2.5 V                       2471 mV
    3.3 V bias                  3296 mV
    VCCIO                       1028 mV
  Power 2
    1.1 V                       1100 mV
    3.3 V                       3300 mV
  Power 3
    0.95 V XL710                 949 mV
    1.05 V                      1050 mV
  Power 4
    1.2 V                       1199 mV
    5.0 V                       5000 mV
  Power 5
    1.0 V                       1000 mV
    1.2 V PHY                   1200 mV
  Bus Revision               116
  FPGA Revision              2

User@mx2008-re0> request chassis routing-engine master switch
warning: Traffic will be interrupted while the PFE is re-initialized
Toggle mastership between routing engines ? [yes,no] (no) yes

Resolving mastership...

User@mx2008-re1> show chassis routing-engine
Routing Engine status:
  Slot 0:
    Current state                  Backup
    Election priority              Master (default)
    CPU temperature             65 degrees C / 149 degrees F
    DRAM                      49108 MB (49152 MB installed)
    Memory utilization           5 percent
    5 sec CPU utilization:
      User                       1 percent
      Background                 0 percent
      Kernel                     4 percent
      Interrupt                  0 percent
      Idle                      94 percent
    Model                          RE-MX2008-X8-64G
    Serial ID                      BUILTIN
    Start time                     2020-10-22 20:47:28 IST
    Uptime                         10 minutes, 28 seconds
    Last reboot reason             0x2000:hypervisor reboot
    Load averages:                 1 minute   5 minute  15 minute
                                       0.29       0.29       0.20
Routing Engine status:
  Slot 1:
    Current state                  Master
    Election priority              Backup (default)
    CPU temperature             62 degrees C / 143 degrees F
    DRAM                      49104 MB (49152 MB installed)
    Memory utilization           5 percent
    5 sec CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     2 percent
      Interrupt                  0 percent
      Idle                      98 percent
    1 min CPU utilization:
      User                       1 percent
      Background                 0 percent
       Kernel                     2 percent
      Interrupt                  0 percent
      Idle                      89 percent
    5 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     0 percent
      Interrupt                  0 percent
      Idle                      38 percent
    15 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     0 percent
      Interrupt                  0 percent
      Idle                      15 percent
    Model                          RE-MX2008-X8-64G
    Serial ID                      BUILTIN
    Start time                     2020-10-22 18:26:10 IST
    Uptime                         2 hours, 31 minutes, 53 seconds
    Last reboot reason             0x2000:hypervisor reboot
    Load averages:                 1 minute   5 minute  15 minute
                                       0.25       0.23       0.23

User@mx2008-re1> show chassis alarms
2 alarms currently active
Alarm time               Class  Description
2020-10-22 20:57:26 IST  Minor  Backup RE Active
2020-10-22 20:57:26 IST  Major  SPMB 0 not online

User@mx2008-re1> show chassis spmb
Slot 1 information:
  State                          Online
  Start time:                    2020-10-22 20:57:28 IST
  Uptime:                        39 seconds

User@mx2008-re1> show chassis environment cb
CB 0 status:
  State                      Online Standby
  Inlet1 Temperature                      39 degrees C / 102 degrees F
  Inlet2 Temperature                      44 degrees C / 111 degrees F
  Inlet3 Temperature                      40 degrees C / 104 degrees F
  Inlet4 Temperature                      40 degrees C / 104 degrees F
  Exhaust1 Temperature                    40 degrees C / 104 degrees F
  Exhaust2 Temperature                    46 degrees C / 114 degrees F
  Exhaust3 Temperature                    43 degrees C / 109 degrees F
  Exhaust4 Temperature                    44 degrees C / 111 degrees F
  Power 1
    1.0 V PHY                    989 mV
    1.15 V                      1153 mV
    1.2 V bias                  1195 mV
    1.5 V                       1495 mV
    1.8 V                       1798 mV
    2.5 V                       2468 mV
    3.3 V bias                  3296 mV
    VCCIO                       1037 mV
  Power 2
    1.1 V                       1099 mV
    3.3 V                       3300 mV
  Power 3
    0.95 V XL710                 919 mV
    1.05 V                      1050 mV
  Power 4
    1.2 V                       1200 mV
    5.0 V                       5000 mV
  Power 5
    1.0 V                       1000 mV
    1.2 V PHY                   1199 mV
  Bus Revision               116
  FPGA Revision              2
CB 1 status:
  State                      Online Master
  Inlet1 Temperature                      37 degrees C / 98 degrees F
  Inlet2 Temperature                      41 degrees C / 105 degrees F
  Inlet3 Temperature                      38 degrees C / 100 degrees F
  Inlet4 Temperature                      39 degrees C / 102 degrees F
  Exhaust1 Temperature                    37 degrees C / 98 degrees F
  Exhaust2 Temperature                    43 degrees C / 109 degrees F
  Exhaust3 Temperature                    42 degrees C / 107 degrees F
  Exhaust4 Temperature                    43 degrees C / 109 degrees F
  Power 1
    1.0 V PHY                    989 mV
    1.15 V                      1150 mV
    1.2 V bias                  1189 mV
    1.5 V                       1492 mV
    1.8 V                       1795 mV
    2.5 V                       2471 mV
    3.3 V bias                  3296 mV
    VCCIO                       1028 mV
  Power 2
    1.1 V                       1099 mV
    3.3 V                       3300 mV
  Power 3
    0.95 V XL710                 949 mV
    1.05 V                      1050 mV
  Power 4
    1.2 V                       1200 mV
    5.0 V                       5000 mV
  Power 5
    1.0 V                       1000 mV
    1.2 V PHY                   1200 mV
  Bus Revision               116
  FPGA Revision              2

The spmb_restart_timer executes spmb_hw_restart to bring the SPMB online, but SPMB does not come online even after the spmb_hw_restart function is executed continuously.

*** messages ***
Oct 22 20:59:24.804  mx2008-re1 chassisd[25421]: CHASSISD_SPMB_RESTART_TIMEOUT: Attempt 2 to restart SPMB 0 timed out; trying again
Oct 22 21:00:24.806  mx2008-re1 chassisd[25421]: CHASSISD_SPMB_RESTART_TIMEOUT: Attempt 3 to restart SPMB 0 timed out; trying again
Oct 22 21:01:24.823  mx2008-re1 chassisd[25421]: CHASSISD_SPMB_RESTART_TIMEOUT: Attempt 4 to restart SPMB 0 timed out; trying again
Oct 22 21:02:24.832  mx2008-re1 chassisd[25421]: CHASSISD_SPMB_RESTART_TIMEOUT: Attempt 5 to restart SPMB 0 timed out; trying again
Oct 22 21:03:24.846  mx2008-re1 chassisd[25421]: CHASSISD_SPMB_RESTART_TIMEOUT: Attempt 6 to restart SPMB 0 timed out; trying again
Oct 22 21:04:24.857  mx2008-re1 chassisd[25421]: CHASSISD_SPMB_RESTART_TIMEOUT: Attempt 7 to restart SPMB 0 timed out; trying again

########## Junos version Master re0:18.1R3.3 / Backup re1:19.1R3.9 ##########

The new backup SPMB 0 comes online after RE switchover, if the old primary RE's Junos OS version is 18.1 +.

User@mx2008-re0> show system information
Model: mx2008
Family: junos
Junos: 18.1R3.3
Hostname: mx2008-re0

User@mx2008-re1> show system information
Model: mx2008
Family: junos
Junos: 19.1R3.9
Hostname: mx2008-re1

User@mx2008-re0> show chassis alarms
No alarms currently active

User@mx2008-re0> show chassis routing-engine |no-more
Routing Engine status:
  Slot 0:
    Current state                  Master
    Election priority              Master (default)
    CPU temperature             64 degrees C / 147 degrees F
    DRAM                      49108 MB (49152 MB installed)
    Memory utilization           5 percent
    5 sec CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     1 percent
      Interrupt                  0 percent
      Idle                      99 percent
    1 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     1 percent
      Interrupt                  0 percent
      Idle                      99 percent
    5 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     1 percent
      Interrupt                  0 percent
      Idle                      69 percent
    15 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     0 percent
      Interrupt                  0 percent
      Idle                      32 percent
    Model                          RE-MX2008-X8-64G
    Serial ID                      BUILTIN
    Start time                     2020-10-22 20:17:33 IST
    Uptime                         14 minutes
    Last reboot reason             0x2000:hypervisor reboot
    Load averages:                 1 minute   5 minute  15 minute
                                       0.24       0.27       0.20
Routing Engine status:
  Slot 1:
    Current state                  Backup
    Election priority              Backup (default)
    CPU temperature             60 degrees C / 140 degrees F
    DRAM                      49104 MB (49152 MB installed)
    Memory utilization           5 percent
    5 sec CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     0 percent
      Interrupt                  0 percent
      Idle                     100 percent
    Model                          RE-MX2008-X8-64G
    Serial ID                      BUILTIN
    Start time                     2020-10-22 18:26:11 IST
    Uptime                         2 hours, 5 minutes, 18 seconds
    Last reboot reason             0x2000:hypervisor reboot
    Load averages:                 1 minute   5 minute  15 minute
                                       0.12       0.21       0.23

User@mx2008-re0> show chassis spmb
Slot 0 information:
  State                          Online
  Start time:                    2020-10-22 20:28:05 IST
  Uptime:                        3 minutes, 32 seconds
Slot 1 information:
  State                          Online - Standby
  Start time:                    2020-10-22 20:28:06 IST
  Uptime:                        3 minutes, 31 seconds

User@mx2008-re0> show chassis environment cb
CB 0 status:
  State                      Online Master
  Inlet1 Temperature         39 degrees C / 102 degrees F
  Inlet2 Temperature         44 degrees C / 111 degrees F
  Inlet3 Temperature         39 degrees C / 102 degrees F
  Inlet4 Temperature         39 degrees C / 102 degrees F
  Exhaust1 Temperature       39 degrees C / 102 degrees F
  Exhaust2 Temperature       46 degrees C / 114 degrees F
  Exhaust3 Temperature       43 degrees C / 109 degrees F
  Exhaust4 Temperature       43 degrees C / 109 degrees F
  Power 1
    1.0 V PHY                    989 mV
    1.15 V                      1153 mV
    1.2 V bias                  1195 mV
    1.5 V                       1498 mV
    1.8 V                       1804 mV
    2.5 V                       2468 mV
    3.3 V bias                  3296 mV
    VCCIO                       1037 mV
  Power 2
    1.1 V                       1099 mV
    3.3 V                       3299 mV
  Power 3
    0.95 V XL710                 919 mV
    1.05 V                      1050 mV
  Power 4
    1.2 V                       1199 mV
    5.0 V                       5000 mV
  Power 5
    1.0 V                       1000 mV
    1.2 V PHY                   1199 mV
  Bus Revision               116
  FPGA Revision              2
CB 1 status:
  State                      Online Standby
  Inlet1 Temperature         37 degrees C / 98 degrees F
  Inlet2 Temperature         41 degrees C / 105 degrees F
  Inlet3 Temperature         38 degrees C / 100 degrees F
  Inlet4 Temperature         39 degrees C / 102 degrees F
  Exhaust1 Temperature       37 degrees C / 98 degrees F
  Exhaust2 Temperature       43 degrees C / 109 degrees F
  Exhaust3 Temperature       42 degrees C / 107 degrees F
  Exhaust4 Temperature       42 degrees C / 107 degrees F
  Power 1
    1.0 V PHY                    982 mV
    1.15 V                      1150 mV
    1.2 V bias                  1189 mV
    1.5 V                       1492 mV
    1.8 V                       1791 mV
    2.5 V                       2471 mV
    3.3 V bias                  3296 mV
    VCCIO                       1031 mV
  Power 2
    1.1 V                       1099 mV
    3.3 V                       3300 mV
  Power 3
    0.95 V XL710                 949 mV
    1.05 V                      1050 mV
  Power 4
    1.2 V                       1200 mV
    5.0 V                       5000 mV
  Power 5
    1.0 V                       1000 mV
    1.2 V PHY                   1200 mV
  Bus Revision               116
  FPGA Revision              2

User@mx2008-re0> request chassis routing-engine master switch
warning: Traffic will be interrupted while the PFE is re-initialized
Toggle mastership between routing engines ? [yes,no] (no) yes

Resolving mastership...

User@mx2008-re1> show chassis routing-engine
Routing Engine status:
  Slot 0:
    Current state                  Backup
    Election priority              Master (default)
    DRAM                      49108 MB (49152 MB installed)
    Memory utilization           0 percent
    5 sec CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     2 percent
      Interrupt                  0 percent
      Idle                      98 percent
    Model                          RE-MX2008-X8-64G
    Serial ID                      BUILTIN
    Start time                     2020-10-22 20:17:33 IST
    Uptime                         16 minutes, 1 second
    Last reboot reason             0x2000:hypervisor reboot
    Load averages:                 1 minute   5 minute  15 minute
                                       0.27       0.26       0.20
Routing Engine status:
  Slot 1:
    Current state                  Master
    Election priority              Backup (default)
    CPU temperature             60 degrees C / 140 degrees F
    DRAM                      49104 MB (49152 MB installed)
    Memory utilization           5 percent
    5 sec CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     1 percent
      Interrupt                  0 percent
      Idle                      98 percent
    1 min CPU utilization:
      User                       2 percent
      Background                 0 percent
      Kernel                     2 percent
      Interrupt                  0 percent
      Idle                      83 percent
    5 min CPU utilization:
      User                       1 percent
      Background                 0 percent
      Kernel                     1 percent
      Interrupt                  0 percent
      Idle                      31 percent
    15 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     0 percent
      Interrupt                  0 percent
      Idle                      12 percent
    Model                          RE-MX2008-X8-64G
    Serial ID                      BUILTIN
    Start time                     2020-10-22 18:26:11 IST
    Uptime                         2 hours, 7 minutes, 33 seconds
    Last reboot reason             0x2000:hypervisor reboot
    Load averages:                 1 minute   5 minute  15 minute
                                       0.38       0.24       0.23

User@mx2008-re1> show chassis alarms
1 alarms currently active
Alarm time               Class  Description
2020-10-22 20:33:20 IST  Minor  Backup RE Active

User@mx2008-re1> show chassis spmb
Slot 0 information:
  State                          Online - Standby
  Start time:                    2020-10-22 20:33:23 IST
  Uptime:                        25 seconds
Slot 1 information:
  State                          Online
  Start time:                    2020-10-22 20:33:23 IST
  Uptime:                        25 seconds

User@mx2008-re1> show chassis environment cb
CB 0 status:
  State                      Online Standby
  Inlet1 Temperature                      39 degrees C / 102 degrees F
  Inlet2 Temperature                      43 degrees C / 109 degrees F
  Inlet3 Temperature                      39 degrees C / 102 degrees F
  Inlet4 Temperature                      40 degrees C / 104 degrees F
  Exhaust1 Temperature                    39 degrees C / 102 degrees F
  Exhaust2 Temperature                    45 degrees C / 113 degrees F
  Exhaust3 Temperature                    42 degrees C / 107 degrees F
  Exhaust4 Temperature                    43 degrees C / 109 degrees F
  Power 1
    1.0 V PHY                    989 mV
    1.15 V                      1153 mV
    1.2 V bias                  1195 mV
    1.5 V                       1495 mV
    1.8 V                       1798 mV
    2.5 V                       2468 mV
    3.3 V bias                  3296 mV
    VCCIO                       1040 mV
  Power 2
    1.1 V                       1099 mV
    3.3 V                       3300 mV
  Power 3
    0.95 V XL710                 919 mV
    1.05 V                      1050 mV
  Power 4
    1.2 V                       1200 mV
    5.0 V                       5000 mV
  Power 5
    1.0 V                       1000 mV
    1.2 V PHY                   1200 mV
  Bus Revision               116
  FPGA Revision              2
CB 1 status:
  State                      Online Master
  Inlet1 Temperature                      37 degrees C / 98 degrees F
  Inlet2 Temperature                      40 degrees C / 104 degrees F
  Inlet3 Temperature                      38 degrees C / 100 degrees F
  Inlet4 Temperature                      39 degrees C / 102 degrees F
  Exhaust1 Temperature                    37 degrees C / 98 degrees F
  Exhaust2 Temperature                    42 degrees C / 107 degrees F
  Exhaust3 Temperature                    42 degrees C / 107 degrees F
  Exhaust4 Temperature                    42 degrees C / 107 degrees F
  Power 1
    1.0 V PHY                    986 mV
    1.15 V                      1150 mV
    1.2 V bias                  1189 mV
    1.5 V                       1488 mV
    1.8 V                       1782 mV
    2.5 V                       2471 mV
    3.3 V bias                  3296 mV
    VCCIO                       1028 mV
  Power 2
    1.1 V                       1099 mV
    3.3 V                       3300 mV
  Power 3
    0.95 V XL710                 950 mV
    1.05 V                      1050 mV
  Power 4
    1.2 V                       1199 mV
    5.0 V                       5000 mV
  Power 5
    1.0 V                       1000 mV
    1.2 V PHY                   1199 mV
  Bus Revision               116
  FPGA Revision              2

User@mx2008-re0> show chassis hardware
Hardware inventory:
Item             Version  Part number  Serial number     Description
Chassis                                JN1263D3CAFL      MX2008
Midplane         REV 21   750-067705   ABAD3885          Midplane
PMP              REV 01   711-051406   ABAD4065          Power Midplane
FPM Board        REV 07   760-068193   ABDL4524          Front Panel Display
PSM 0            REV 08   740-050037   1EDB6490CBV       DC 52V Power Supply Module
PSM 1            REV 08   740-050037   1EDB6490C26       DC 52V Power Supply Module
PSM 2            REV 08   740-050037   1EDB6490BX7       DC 52V Power Supply Module
PSM 3            REV 08   740-050037   1EDB6490C5R       DC 52V Power Supply Module
PSM 4            REV 08   740-050037   1EDB707005K       DC 52V Power Supply Module
PSM 5            REV 08   740-050037   1EDB6490C8R       DC 52V Power Supply Module
PSM 6            REV 08   740-050037   1EDB6490C8L       DC 52V Power Supply Module
PSM 7            REV 08   740-050037   1EDB6490BTX       DC 52V Power Supply Module
PDM 0            REV 03   740-050036   1EFD6471150       DC Power Dist Module
PDM 1            REV 03   740-050036   1EFD3390110       DC Power Dist Module
Routing Engine 0          BUILTIN      BUILTIN RE-MX2008-X8-64G
Routing Engine 1          BUILTIN      BUILTIN RE-MX2008-X8-64G
CB 0             REV 17   750-067373   ABDN3022          Control Board
CB 1             REV 13   750-067373   ABDK8165          Control Board
SFB 0            REV 13   750-067371   ABDK5367          MX2008 Switch Fabric Board 2
SFB 1            REV 13   750-067371   ABDK5425          MX2008 Switch Fabric Board 2
SFB 2            REV 13   750-067371   ABDN3287          MX2008 Switch Fabric Board 2
SFB 3            REV 13   750-067371   ABDK5362          MX2008 Switch Fabric Board 2
SFB 4            REV 13   750-067371   ABDK5424          MX2008 Switch Fabric Board 2
SFB 5            REV 13   750-067371   ABDK5358          MX2008 Switch Fabric Board 2
SFB 6            REV 13   750-067371   ABDK5419          MX2008 Switch Fabric Board 2
SFB 7            REV 13   750-067371   ABDK5349          MX2008 Switch Fabric Board 2
ADC 4            REV 19   750-043596   ABCV1289          Adapter Card
Fan Tray 0       REV 03   760-052467   ACAZ1393          172mm FanTray - 6 Fans
Fan Tray 1       REV 03   760-052467   ACAZ1446          172mm FanTray - 6 Fans

 

Solution:

The problem is seen if the old primary RE's Junos OS version is 17.4R3, but NOT seen if the old primary RE's Junos OS version is 18.1R1 +, which means that the issue is fixed in Junos OS Release 18.1R1.

This is not a hardware issue, but a software issue. If the Junos OS version is the same on both Routing Engines, the SPMB x problem is not seen after RE switchover.

 

Modification History:

Note: Replaced words that failed to represent the inclusion and diversity Juniper values; in this case master changed to primary in context

 

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