Description

Post upgrading the BIOS from "CDEN_P_EX1_00.15.01.00" to "CDEN_P_EX1_00.20.01.00" ET-(0/1/0 & 0/1/1) went down or not shown under "show interface terse" output.

Symptoms

This issue might been seen if the following conditions are meet:
  • Device is EX4400-48F
  • BIOS is upgraded from "CDEN_P_EX1_00.15.01.00" to "CDEN_P_EX1_00.20.01.00"
  • QSFP-100G-CWDM4 is used on PIC1
Note: The SFPs details are present under "show chassis hardware". But under "show interface terse" output the interface is not present. 
root@switch> show chassis hardware
Hardware inventory:
Item             Version  Part number  Serial number     Description
Chassis                                YK1010101011      EX4400-48F
Pseudo CB 0
Routing Engine 0          BUILTIN      BUILTIN           RE-EX4400-48F
  mmcsd0 19680 MB  MMCHC               220402F9          eMMC Disk
  usb0 (addr 0.1) XHCI root HUB 0      0x8086            uhub0
FPC 0            REV 11   650-114385   YK4322300019      EX4400-48F
  CPU                     BUILTIN      BUILTIN           FPC CPU
  PIC 1          REV 11   650-114385   YK4322300019      2x100G QSFP28 VCP
    Xcvr 0       REV 01   740-061408   G0000000011       QSFP-100G-CWDM4
    Xcvr 2       REV 01   740-061408   G1100000000       QSFP-100G-CWDM4

Solution

Post BIOS upgrade, the HGoE and Network-port mode will be cleared, and the mode of switch will be default back to HiGiG mode on EX4400. So, If the ports are configured to Network-port or HGoE then there will be service impact.
To restore the port back to network-port you have to use the command:
root@switch> request virtual-chassis mode network-port reboot
 

How to verify that the ports are HiGiG, HGoE or network-port.

  • Network-port mode:

root@switch> show virtual-chassis mode
fpc0:
--------------------------------------------------------------------------
Current mode :  network-port mode


root@switch> show virtual-chassis vc-port
fpc0:
--------------------------------------------------------------------------
root@switch>

 

  • HiGiG Mode:

root@switch> show virtual-chassis mode
fpc0:
--------------------------------------------------------------------------
Current mode : Virtual Chassis with similar devices


root@switch> show virtual-chassis vc-port
fpc0:
--------------------------------------------------------------------------
Interface   Type              Trunk  Status       Speed        Neighbor
or                             ID                 (mbps)       ID  Interface
PIC / Port
1/0         Configured         -1    Down         50000
1/1         Configured         -1    Down         50000
1/2         Configured         -1    Down         50000
1/3         Configured         -1    Down         50000

 

  • HGoE Mode:

root@switch> show virtual-chassis mode
fpc0:
--------------------------------------------------------------------------
Current mode : Virtual Chassis with hgoe mode enabled


root@switch> show virtual-chassis vc-port
fpc0:
--------------------------------------------------------------------------
Interface   Type              Trunk  Status       Speed        Neighbor
or                             ID                 (mbps)       ID  Interface
PIC / Port
1/0         Configured         -1    Down         100000
1/1         Configured         -1    Down         100000

 

Modification History

2023/07/19: First Draft

Related Information

https://www.juniper.net/documentation/us/en/software/junos/virtual-chassis-fabric/topics/ref/command/request-virtual-chassis-mode-mixed-ex-series.html