On QFX5100, after an upgrade to 21.4R3-S2, FPC is not detected by the device under 'show chassis fpc', and core dumps are generated during the upgrade process.
{master:0}
root@qfx5100-2> show chassis fpc | refresh 5
---(refreshed at 2024-02-08 16:44:32 CET)---
Temp CPU Utilization (%) CPU Utilization (%) Memory Utilization (%)
Slot State (C) Total Interrupt 1min 5min 15min DRAM (MB) Heap Buffer
0 Empty
root@qfx5100-2> show interfaces descriptions
Interface Admin Link Description
xe-0/0/0 r640-46_em2
xe-0/0/1 r640-46_p1p2
xe-0/0/2 r640-47_em2
xe-0/0/3 r640-47_p1p2
xe-0/0/4 r640-14_em2
xe-0/0/5 r640-14_p1p2
xe-0/0/6 r640-15_em2
xe-0/0/7 r640-15_p1p2
xe-0/0/8 r640-16_em2
xe-0/0/9 r640-16_p1p2
xe-0/0/10 r640-17_em2
xe-0/0/11 r640-17_p1p2
xe-0/0/12 r740-4_em2
xe-0/0/13 r740-4_p1p2
xe-0/0/14 r740-5_em2
xe-0/0/15 r740-5_p1p2
xe-0/0/16 r740-6_em2
xe-0/0/17 r740-6_p1p2
xe-0/0/18 r640-18_em2
xe-0/0/19 r640-18_p1p2
xe-0/0/20 r640-19_em2
xe-0/0/21 r640-19_p1p2
xe-0/0/22 r640-20_em2
xe-0/0/23 r640-20_p1p2
xe-0/0/24 r640-21_em2
xe-0/0/25 r640-21_p1p2
xe-0/0/26 r640-22_em2
xe-0/0/27 r640-22_p1p2
xe-0/0/28 r640-23_em2
xe-0/0/29 r640-23_p1p2
xe-0/0/30 r640-24_em2
xe-0/0/31 r640-24_p1p2
xe-0/0/32 r640-25_em2
xe-0/0/33 r640-25_p1p2
xe-0/0/34 r640-26_em2
xe-0/0/35 r640-26_p1p2
xe-0/0/36 r640-27_em2
xe-0/0/37 r640-27_p1p2
xe-0/0/38 r640-28_em2
xe-0/0/39 r640-28_p1p2
xe-0/0/40 r640-29_em2
xe-0/0/41 r640-29_p1p2
xe-0/0/42 r640-30_em2
xe-0/0/43 r640-30_p1p2
xe-0/0/44 r640-31_em2
xe-0/0/45 r640-31_p1p2
xe-0/0/46 r640-32_em2
xe-0/0/47 r640-32_p1p2
et-0/0/50 to
et-0/0/51 qfx5100-1 et-0/0/51
et-0/0/52 qfx5100-1 et-0/0/52
root@qfx5100-2> show system core-dumps no-forwarding
/var/tmp/*core*: No such file or directory
Host Crash Info:
--------------------------------------------------------------------------
-rw-r--r-- 1 root root 6552807 Feb 8 16:40 /var/crash/core-dcpfe-dcpfe0-0-1707406797.core.tgz
-rw-r--r-- 1 root root 6551890 Feb 8 16:40 /var/crash/core-dcpfe-dcpfe0-1-1707406802.core.tgz
-rw-r--r-- 1 root root 6553749 Feb 9 08:55 /var/crash/core-dcpfe-dcpfe0-3-1707465302.core.tgz
On the Junos QFX5100 platform, after upgrading the system to the affected TVP/5e releases the PFE (Packet forwarding Engine) will crash continuously, and Flexible PIC Concentrators (FPC) will remain down. TVP/5e Junos only needed if mixed VC of QFX5100 & QFX5110 need to form.
TRIGGERS
This issue might be seen if the following conditions are met: * On TVP/5e Junos QFX5100 platform. TVP/5e Junos only needed if mixed VC of QFX5100 & QFX5110 need to form * Upgrading the system to the affected releases
PR to refer to:
Juniper Networks - Problem Report Search
Resolved versions as per PR:
20.2R3-S7, 20.4R3-S7, 21.1R3-S5, 21.3R3-S4, 21.4R3-S3, 22.1R3-S2, 22.2R3, 22.3R3, 22.4R2, 23.1R1, 23.1R2, 23.2R1